1、what is total yield of eggs of hyline w36 from onset of egg production to 80 weeks of age? a、15 b、22 c、13 d、25
2、what is the feed conversion ratio of modern commercial laying breed? ( ) a、2.8:1 b、1.5:1 c、2:1 d、3.5:1
3、how long does arbor acres grow to 2kg? ( ) a、35 days b、28 days c、42 days d、49 days
4、what is the feed conversion ratio of arbor acres achieving market weight?( ) a、3.5:1 b、3:1 c、1.6:1 d、2:1
5、what is the ratio of ducks reared in china accounting for total number in the world? ( ) a、over 60 % b、over 20 % c、over 40 % d、over 80 %
6、how many chickens were reared in china in 2017? ( ) a、8 billion b、5 billion c、6 billion d、7 billion
7、which country is not in top 3 for total number of chickens according to data from fao stat? ( ) a、indonesia b、us c、china d、brazil
8、what is average consumption of eggs per person every year in china? ( ) a、15 kg b、12 kg c、18 kg d、23 kg
9、what is the proportion of poultry meat accounting for total meat consumption in china? ( ) a、21.6 % b、64.9 % c、8.3 % d、5.2 %
10、what is nutritional characteristics of eggs? ( ) a、high contents of protein b、high concentration of energy c、high contents of fat d、nutrient balance
11、what is the rank of the number of laying hens reared in china in the world? ( ) a、1 b、5 c、2 d、3
12、what is the rank of the number of broiler chickens reared in us in the world? ( ) a、3 b、2 c、1 d、5
13、which is the wrong description for the problems in chinese poultry industry? ( ) a、genetic potential of breeds is not full utilized b、despite of maintaining a large population, small scale poultry farms are the majority of poultry industry c、rearing and managing levels need be improved d、export amount of eggs ranks no. 1 in the world
14、rational drug use is the most important for control of poultry diseases ( )
15、modern poultry production has realized automatic supplies of feed and water, collection of eggs and removal of feces
16、deep processing of poultry eggs and meat can increase the additional value of products ( )
17、proteins in eggs is characterized as amino acid balance and have high digestibility among animal proteins ( )
18、china is a major country rearing poultry. poultry industry contributes the most to gdp among all animal husbandry industries. ( )
chapter 1 homework
1、what are the characteristics of modern poultry production?
2、to describe key technologies in mordern poultry industry in brief
3、to analyze disadvantages of small scale poultry farm as the majority of poultry industry?
chapter 2 poultry biology
chapter 2 unit test
1、what is the digestive organ that is known as “food crusher” ? ( ) a、crop b、gizzard c、proventriculus d、liver
2、which organ or anatomic structure do chickens not have? ( ) a、crop b、urinary bladder c、air sac d、bursa of fabricius
3、how many air sacs do chickens have? ( ) a、7 b、6 c、9 d、10
4、which organ have a function of food storage for a short time? ( ) a、gizzard b、crop c、proventriculus d、liver
5、who is the ancestor of chicken? ( ) a、red junglefowl b、black-necked gallus c、gallus sonneratii d、green tailed jungle fowl
6、what is the body temperature of adult chicken? ( ) a、36.5 ℃ b、38 ℃ c、39 ℃ d、41 ℃
7、which is a right description about physiological characteristic of chicken? ( ) a、chicken has a higher body temperature than mammals b、the density of sperm is high, but the viability of sperm is poor c、chicken has sweat gland d、chicken has a low metabolic rate
8、which is a right description about the function of comb? ( ) a、heat loss b、phenotype of comb have been fixed into single comb in all modern chicken breeds c、comb belongs to a skin derivative and mainly consists of connective tissue with little blood vessels d、combs of cock and hen have no significant difference in size
9、one type of comb will exclusively exist within one breed ( )
10、the content of fiber should range from 2.5 % to 5.0 % as fiber can’t be efficiently digested in cecum
11、only right ovary and oviduct develop in chicken
12、chickens have high feed utilized efficiency as they have a long intestinal tract
13、avian erythrocyte is smaller than that of mammals and does not have a nucleus
14、chick, duck and goose do not have a mature priapus
15、the jejunum and ileum are bounded by the yolk stalk (meckel’s diverticulum)
chapter 2 homework
1、what does the germinal disc consist of?
2、what is the vaned (contour) feather?
3、what does the digestive system consist of?
4、to simply describe physiological characteristics of chicken
5、what is the function of air sac?
chapter 3 poultry breed
chapter 3 unit test
1、what is the purpose of white leghorn? a、meat production b、egg production c、dual-purposes of egg and meat d、for game or pet
2、what contribute much to high production performance of modern breeds originated from multiple way hybrid system? a、interaction of gene and environment b、additive effect c、epistatic effect d、heterosis
3、when we sex chicks using gold/silver sex-linked genes, which is the right mating mode? a、zszs×zsw b、zszs×zsw c、zszs×zsw d、zszs×zsw
4、what is the purpose of cornish? a、egg production b、for game and pet c、dual-purpose of egg and meat d、meat production
5、which is used as father line in multiple way hybrid system? a、white leghorn b、cornish c、orpington d、australorps
6、which is used as mother line in meat-type hybrid breeds? a、white plymouth rock b、white leghorn c、rhode island red d、cornish
7、which is a standard breed laying white egg? a、white recessive rock b、hy-line brown c、rhode island red d、white leghorn
8、what is the slow feather defined as? a、primaries is longer than primary coverts b、primaries is shorter than primary coverts c、primaries is longer than secondaries d、primaries is shorter than secondaries
9、which is the right option below during sexing chicks using fast/slow feather genes? a、male chicks show slow feather b、to cross fast-feathered hen with slow-feathered cock c、fast feather is defined as primaries is longer than primary coverts d、chicks can be successfully sexed within 48 hours after hatched
10、why is the dwarf gene not used to sex identification of chicks? a、the dw is not a sex-linked gene b、the dw reduces body weight of chicks c、it is difficult to measure phenotype of chicks with the dw gene d、there is no difference between male and female chicks with the dw gene
chapter 3 homework
1、poultry breed
2、strain
3、advantages of cross breeding system
4、hen-day eggs
5、hen-housed eggs
6、advantages of molecular marker-assisted selection
chapter 4 artificial incubation
chapter 4 unit test
1、the chick embryo changed from allantoic chorionic respiration to lung respiration on the ( ) day a、19 b、12 c、19 d、15
2、the development of chicken embryo can be divided into two stages: in vivo and in vitro, in which the in vitro development period is ( ) days a、21 b、22 c、1 d、26
3、the critical temperature of chicken embryo development is ( ) a、23.9 ℃ b、37.8℃ c、26 ℃ d、33 ℃
4、the characteristic of unfertilized egg is ( ) a、no blood vessels were found in the eggs after 5 days of incubation b、after 10 days of incubation, the allantoic bag is closed c、see hemolysis ring 8 days after hatching d、after 24 hours of incubation, no blood vessels were found in the eggs
5、the time for the chicken embryo to move the plate (drop the plate) is ( ) a、19 days b、12 days c、14 days d、17 days
6、the period of the second death peak of chicken embryo was ( ) a、18～19 days b、3～5 days c、7～10 days d、12～14 days
7、in the hatching process of breeding eggs, three times of laying are usually arranged, and the first laying is usually carried out in ( ) a、the fifth day b、the 10th day c、17 days d、19 days
8、the appropriate humidity required for chicken embryos during incubation period is ( ) a、50～60 % b、40～50 % c、60～70 % d、75 %
9、the appropriate thickness of an egg shell is ( ) mm a、0.33~0.35 b、0.2~0.25 c、0.25~0.3 d、0.35~0.4
10、the suitable humidity for breeding eggs is ( ) a、75~80% b、50~55% c、55~60% d、65~70%
12、in order to keep abreast of the development of chicken embryos, non-sperm eggs and dead eggs are usually picked out on the ( ) day of hatching. a、5 b、10 c、12 d、17
13、the typical characteristic of the dead embryo egg is ( ). a、hemolytic ring on egg body surface b、the egg body is covered with fine blood vessels c、eggs have no blood vessels d、impaired chamber boundaries
14、during production, chickens should have a fertilized egg hatchability above ( ) to be qualified a、90% b、60% c、70% d、80%
15、the identification of female and male of rectum should be carried out within ( ) hours after birth a、12 b、8 c、10 d、24
16、the appropriate humidity required for chicken embryos at the hatching stage is ( ) a、75% b、60% c、90% d、80%
17、the gastrointestinal function of the chicken embryo, which can open its mouth to swallow the protein in amniotic fluid, occurs on ( ) day. a、12 days b、5 days c、19 days d、17 days
19、the correct description of incubation indicators is ( ) a、the fertilization rate is generally above 90% b、the hatching rate of fertilized eggs is generally above 90% c、the rate of healthy young is generally more than 90% d、the probability of producing a healthy female chick from a single breeding egg is 36.5 percent e、the probability of obtaining a healthy female chick from one breeding egg is 50 percent
20、incubator functions include ( ). a、take air b、turn the egg c、maintain a constant humidity d、maintain a constant temperature e、maintain constant light
21、internal factors affecting the incubation effect include ( ). a、quality of eggs b、nutritional intake and health of breeders c、incubation conditions d、management of breeding eggs e、incubation technology
22、disinfection methods for eggs include ( ) a、immerse with 0.1% iodine solution b、formaldehyde fumigation c、0.5% potassium permanganate leaching d、75% alcohol immersion e、0.1% lime milk immersion
23、the methods of chick sex identification include ( ). a、identification of gold and silver plumes b、identification of fast and slow plumes c、reversal anal discrimination d、crown type identification e、short stature gene identification
24、the correct description for the differentiation of male and female in chickens is ( ). a、visible reproductive eminence in roosters b、meconium should be discharged first c、hens with visible growth humps d、it should be identified within 48 hours of birth e、the genital eminence is located at the 12 o 'clock position of the anus
25、the following are the characteristics of "normal embryo egg". a、there are blood vessels on the surface of the egg body b、occasionally, embryonic eyes are visible c、18 the weather chamber has been tilted d、there are hemolytic rings in the egg e、blurred chamber boundaries
26、the correct description of the allantoic sac is ( ) a、function of the lungs during embryonic development b、grow close to the eggshell c、it has the function of absorbing calcium from eggshell d、kidney function during early embryonic development e、gradually fuses with the amniotic membrane
27、what is correct about the selection of eggs? a、moderate-sized eggs hatch the most b、eggshell color has little effect on hatchability of breeding eggs c、eggshell cleanliness affects the hatchability of breeding eggs d、oval eggs hatch best e、the larger the egg, the higher the hatching rate
28、the embryonic membranes that provide oxygen for the development of the embryo include ( ) a、allantoic chorionic membrane b、the yolk sac c、amniotic membrane d、inner eggshell membrane e、outer eggshell membrane
29、the yolk sac appears on the second day of incubation and its main function is to provide nutrients and oxygen to the embryo. ( )
30、the development of an embryo is divided into two stages: maternal development and extraternal development, of which the extraternal development stage is the incubation stage. ( )
31、the incubation temperature, humidity and ventilation should be increased in the later incubation period. ( )
32、on the sixth day of incubation, water from the egg white floods into the yolk, causing the yolk to grow in size. ( )
33、the optimal incubation temperature of chicken embryos is 37.8℃. ( )
34、constant temperature incubation is easier to operate, but variable temperature incubation is more in line with the rules of embryo development ( )
35、in the process of embryo incubation, the relative humidity in the incubator is too low, which will increase the water loss rate of embryo eggs ( ).
36、during the incubation of embryos, the same relative humidity is required during incubation and hatching. ( )
37、the ideal egg shape index is between 0.72 and 0.75 ( )
38、disinfection of breeding eggs for three times is beneficial to improve the hatching rate of breeding eggs. ( )
39、the amniotic membrane and the chorionic membrane are the same type of membrane, and both develop from the ectoderm of the blastocyst ( )
40、the amniotic membrane protects the embryo from mechanical impact. ( )
41、the allantoic chorionic membrane provides the embryo with nutrients from the yolk and calcium from the eggshell
42、for the first six days of incubation, an embryo is powered mainly by carbohydrates. ( )
43、temperature has a great influence on incubation. if the incubation temperature is higher than the optimal temperature needed for the development of chicken embryos, it will accelerate the development of chicken embryos and shorten the incubation period ( ).
44、the temperature and humidity of the hatching period should be slightly higher than that of the hatching period ( )
45、in all kinds of birds, the larger the embryo, the longer the incubation period.
chapter 4 unit homework
1、critical temperature
2、seal the door
3、the types and functions of the embryonic membrane are briefly described.
4、describe three methods in which an embryo obtains oxygen
5、briefly describes the constant temperature hatching and variable temperature hatching and the comparison of their advantages and disadvantages.
6、explain the meaning of egg turning
chapter 5 rearing and management of laying hens
chapter 5 unit test
1、the appropriate light time in laying period is ( ). a、16 hours b、11 hours c、12 hours d、24 hours
2、( )distance should be reserved for each adult laying hen when feeding in a trough a、8cm b、5cm c、15cm d、20cm
3、the adult weight of medium layer is about ( ). a、1.7kg b、1.3kg c、3kg d、2.5kg
4、which of the following farming methods cannot separate chicken and feces ( ) a、woodland stocking b、online nursing c、stepped cages d、full overlap cages
5、the brood period of laying hens usually refers to ( ) a、0-6 weeks b、0-3 weeks c、0-10 weeks d、0-17 weeks
6、special attention should be paid to the addition of ( ) in order to meet the nutritional requirements of chick plumage a、methionine b、lysine c、threonine d、tyrosine
7、chicks should be first used in the house a、drinking water b、open food c、disinfect d、vaccination
8、it is suitable to use ( ) as starter food for chicks a、crushed corn b、full-price granular material c、soybean meal d、young chicken
9、the feeding principle of less feeding and more frequent feeding should be adopted in the brood period, and the appropriate feeding interval is ( ) hours a、3 b、1 c、6 d、8
10、the feeding condition of chicks can be known according to ( ) a、crop filling b、behavior c、feces d、how often you drink water
11、the correct way to drink water for chicks is ( ) a、5% glucose in water. b、give chickens cool tap water c、make sure to clean the water fountain once a week. d、add antibiotics to water
12、the body temperature of newly hatched chicks is ( ) a、39.2 b、37.5 c、41 d、36.5
13、reasons for using long period of light in brood period ( ) a、get familiar with the environment so that the chicks have more time to eat and drink. b、stimulate gonadal development c、heating d、increase the time of activity and promote muscle growth.
14、the principle of ( ) should be adopted in the light time of brood stage a、diminishing b、incremental c、constant d、high before low after low
15、growing period is to control sexual maturity, and illumination time should be used ( ) a、constant b、incremental c、decline d、first low, then high
16、the appropriate humidity range in brood stage is ( ) a、56%-70% b、40-60% c、70-80% d、80 to 90 percent
17、what is correct in describing the nutritional characteristics of adult chicken feed ( )? a、the energy level is basically the same, but the protein level is lower than the chicken feed. b、high energy and high protein c、low energy and high protein d、increasing the amount of various amino acids added
18、the purpose of feeding gravel is ( ) a、help grind food b、calcium supplements c、promote food emptying d、increase satiety
19、the evenness of chicken population is related to ( ) a、initial production concentration b、egg production rate at the peak of egg production c、time to sexual maturity d、availability of feed protein
20、the qualified standard for uniformity of chicken flock is ( ) a、70-76% b、60-75% c、77% -- 83% d、>83%
21、which of the following factors affect the evenness of the flock ( ) a、feeding density b、temperature c、lighting d、ventilation
22、the vaccine usually given at birth is ( ) a、malik b、bursa of fabricius c、newcastle disease d、bird flu
23、which of the following vaccines is administered most frequently in the standby phase ( ) a、new clade and two combined seedlings b、bursa of fabricius freeze-dried seedlings c、chicken pox d、avian cholera
24、generally, the time between the first laying day and the peak laying time is ( ) weeks a、4-6 b、1-2 c、3-4 d、6-10
25、the normal weekly drop in laying rate after peak laying is ( ) a、0.5%-1% b、2% c、3% d、5%
26、under normal conditions, peak egg production of commercial layer breeds can last ( ) months a、4-7 b、1-2 c、3-4 d、8
27、the nutrient that has the greatest influence on laying performance of laying hens is ( ) a、energy b、protein c、methionine d、cysteine
28、generally, the supplemental amount of calcium in the feed of laying hens is ( ) a、3.5-4.5% b、1-2% c、1.5-2.5% d、2.5-3%
29、forms of calcium in eggshells a、calcium carbonate b、calcium phosphate c、calcium bisphosphate d、calcium bicarbonate
30、ambient temperature above ( ) will affect feeding and laying of laying hens a、27 b、24 c、30 d、33
31、the most effective cooling measures are ( ) a、wet curtain cooling method b、spray cooling method c、paint the outside of the chicken house white to radiate heat. d、open the window for ventilation.
32、forced molting should be carried out at ( ) a、late stage of egg production b、before birth c、the period of increasing laying rate d、peak egg production
33、the purpose of extending the illumination time during the laying period is ( ) a、stimulate ovulation b、make sure the chickens have enough foraging time and enough energy c、keep layers excited d、promote the absorption of calcium
34、the normal concentration of adult cocks per sperm collection is ( ) ml a、0.5-1 b、0.05-0.1 c、1-2 d、2-3
35、the suitable ratio of natural mating between males and females is ( ) a、male: female = 1:10 b、male: female = 3:10 c、male: female = 1:25 d、male: female = 3:1
36、at present, forced molting is mainly used in ( ) a、breeding chicken b、commercial laying hens c、young chicken d、chickens at the peak of egg production.
37、the purpose of increasing the ambient temperature during the operation period during the mild moulting procedure is ( ) a、to get chickens to reduce feed intake in a gentler way b、to prevent chickens from catching colds due to their weakened resistance c、increase egg production d、reduced death rate
38、the unreasonable dietary nutrient level of laying hens during laying period is ( ) a、crude protein is 10% ~ 13% b、metabolizable energy 10 mj/kg c、calcium is 2.5% d、crude protein 16% e、metabolizable energy 12 mj/kg
39、the unreasonable feeding management of laying hens during laying period is ( ) a、light control during growth b、increase the calcium content in the feed c、free feeding during peak egg season d、feeding during peak period of egg production
40、the purpose of cutting off the chick's beak is ( ) a、prevent pecking b、avoid bringing feed into the discharge tank when feeding c、avoid bringing feed into the discharge tank when feeding d、speed up feeding
41、because chick's digestive function is weak, its diet must meet the following conditions ( ). a、feed palatability is good b、the digestibility of the feed is high c、the feed is low in fibre d、the nutritional value of feed is high
42、in practice, adding grit to feed during growing period can improve digestibility of feed. but the addition of gravel must be careful ( ) a、additive amount b、gravel granularity c、breed of bred chicken d、the weight of a breeding chicken
43、the three stages of laying hens can be divided into ( ) a、growing period b、the brood period c、egg production period d、peak egg production e、backup period
44、the advantages of the all-in-all-out management system include ( ) a、easy to manage b、it is good for epidemic prevention. c、high feed conversion rate d、energy conservation e、it is beneficial to increase the breeding density
45、the correct description of the advantages of stocking is ( ). a、to cater to the natural habits of the chicken b、small investment c、chickens are not prone to chest and leg disease. d、high production performance e、high feed conversion rate
46、the correct description of the advantages of cage breeding is ( ). a、high stocking density b、save feed c、easy to collect eggs d、the chicken looks good. e、small investment
47、causes of poor thermoregulation in chicks ( ) a、inadequate function of the thermoregulatory center b、less subcutaneous fat and sparse feathers c、large surface area per unit weight, fast heat dissipation d、poor self-heat production capacity e、slow metabolism of nutrients
48、physiological characteristics of chicks include ( ) a、to grow and develop rapidly. b、fast heart rate c、imperfect thermoregulation d、poor resistance to disease e、low feed conversion rate
49、what is correct about the description of the characteristics of the enclosed chicken coop? a、strong environmental control ability b、high energy consumption c、high breeding density d、low cost e、the internal environment is greatly influenced by the external environment.
50、what are the behaviors of chicks when the brood temperature is too high ( ) a、keep away from heat sources. b、restless and restless c、increased breathing rate d、increased frequency of eating and drinking e、sleepiness
51、when the brood temperature is low, the behavior of chicks is ( ) a、trembling scream b、in a crowd c、close to a heat source d、increased breathing rate e、to move around
52、the correct description of the effect of light in poultry production is ( ) a、promote egg production b、affects the intake and drinking water of chickens c、promote molting d、stimulate appetite e、stimulate the immune system
53、what are the negative effects of high density of chicken house ( ) a、increased pressure on disease prevention and control b、it is easy to grab food c、predisposed to pecking d、the air quality is getting worse. e、early moulting time
54、the correct description of the physiological characteristics of adult chickens is ( ). a、the functions are getting better. b、complete sexual maturation c、perfect body maturation d、somatic maturation and sexual maturation are completed simultaneously e、complete body maturation first
55、measures to regulate sexual maturation include ( ) a、adjusting the lighting time b、regulating the growth rate of chickens c、adjust feeding density d、regulating the temperature of the chicken coop e、adjusting the evenness of the chicken population
56、the correct description of the source of calcium in eggshells is ( ). a、60% to 70% is provided by dietary calcium. b、30% to 40% is provided by medullary bone c、all supplied by calcium in the feed d、30% to 40% is provided by cortical bone e、supplied by gravel
57、what is correct in describing the implementation purpose of the phased feeding method ( )? a、save feed b、prevention of excessive fat deposition at the later stage of egg production c、it is beneficial to improve the performance of laying eggs in the later stage of laying d、it is beneficial to improve the performance of egg production during peak period. e、it is beneficial to increase the body weight of laying hens at the later stage of laying
58、what is correct about description of appearance characteristics of high-yield laying hens is ( ) a、the comb is red and warm. b、wide interpubic distance c、anal moisture is easy to dilate d、have a strong appetite e、the feathers are neat and shiny in the late stage of laying
59、what is correct about the description of the compulsory moulting scheme under the livestock law ( ) a、the basic elements of animal husbandry method are cut off water, cut off feed, and shorten light. b、the mortality rate should be kept under 3%. c、weight should be reduced by 25-30% d、the preparation period, implementation period and recovery period e、the mortality rate should be kept below 5%.
60、the feeding of laying hens can be divided into three stages, but the time points of different breeds are different. ( )
61、there are two schemes of three-stage feeding and two-stage feeding for laying hens. ( )
62、in the production, the commonly used chicken coop has the open and the closed two kinds, the open chicken coop feeding density can be higher than the closed feeding. ( )
63、one of the reasons why chick's digestive function is not perfect is that chick's digestive enzymes secrete less. ( )
64、in order to meet the needs of chick feather growth, attention must be paid to the level of lysine in the diet. ( )
65、the key link of chick rearing is to pay attention to the time of drinking water and starting food, and the whole price feed must be used for starting food. ( )
66、a measure of the intake of chicks is the crop, which is usually 8% eight hours after opening. ( )
67、with the increase of the age of chicks, chick feed was changed to adult feed at 7 weeks of age. the protein content of adult chicken feed must be higher than that of chick feed. ( )
68、in practice, the replacement of brooding chicken feed to laying chicken feed should be done step by step, usually requiring a transition time of 5 to 6 days. ( )
69、the only light receptor in poultry is the hypothalamus. ( )
70、in production practice, if three-stage feeding is adopted, the age of 22 to 32 weeks is the increasing period of laying rate. ( )
71、chickens grow rapidly, and if nutrient supply is insufficient at the brood stage, the impact on their growth and development can be quickly compensated for by nutrient enhancement at the later stage. ( )
72、the body temperature of 22 chicks increased gradually from 4 days of age to 41 ~ 42℃ at 10 days of age, and the thermoregulation function of chicks tended to be perfect at about 3 weeks of age. ( )
73、feeding time of adult chickens should be determined according to the actual body weight and plantar length of the chickens ( )
74、granite gravel should be selected as feeding gravel ( )
75、early completion of sexual maturation is beneficial to prolonging the laying period
76、the principle of total nutrient supply for laying hens in stage feeding method is lower in the beginning and higher in the end ( )
77、light duration of laying hens should be gradually shortened with the decrease of laying rate ( )
78、the utilization time of 75 roosters should start from 17 weeks of age ( )
79、the laying performance of chickens in the second laying cycle was higher than that in the first laying cycle ( )
80、the evenness mainly affected the growth of the chicken population, but had little effect on laying performance
chapter 5 unit homework
1、describe the physiological characteristics of chicks.
2、briefly summarize the key points of brood management
3、what are the causes of poor thermoregulation in chicks?
4、what is uniformity and what are the factors that affect uniformity?
5、what are the factors of poor digestive function in chicks?
6、what are the types of hen houses and what are their advantages and disadvantages?
7、what is the egg laying curve?
8、what is all in all out system?
chapter 6 feeding and management of broiler chickens
chapter 6 unit test
1、which of the following statements is correct about the advantages of free-range chickens？ a、meat and eggs are of good quality b、it has higher feed conversion rate c、separated from feces, chickens are less prone to infectious diseases d、high production performance
2、sudden death syndrome usually occurs in ( ) broilers. a、fast growth b、light weight c、high quality yellow-feather d、less than 3 weeks of age
3、when the laying rate of broilers reaches ( ), it is called the first-egg age. a、5% b、6% c、7% d、8%
4、the dietary energy level of fast-growing broilers in middle and late period is ( ). a、13.4 mj/kg b、10.0 mj/kg c、12.0 mj/kg d、14.5 mj/kg
5、which description is correct about the characteristics of high quality broilers. a、meat quality is good b、fast growth c、it has higher feed conversion rate d、short growth cycle
6、variation of feed conversion rate with growth of broilers is（ ） a、gradual increase b、gradually reduce c、remains unchanged d、first decrease then increase
7、which of the following substances is not associated with the flavor of chicken. a、vitamin b、free amino acid c、intermuscular fat d、hypoxanthine nucleotide
8、which practice is wrong when broilers are marketed .( ) a、the chicken should be caught by both wings, with a maximum of 3-4 birds allowed in each hand. b、stop feeding the chicken 4-6 hours before into the cage, but do not stop water supply. c、lift or remove all equipment before catching the chicken to avoid damaging the chicken or breaking the equipment during catching. d、keep the light as low as possible, or use blue bulbs to reduce the bird's vision. e、try to keep quiet while catching the chickens to avoid crowding caused by panicked chickens.
9、the nutritional supply characteristic of fast-growing broilers is ( ). a、high energy and high protein b、low energy and low protein c、low energy and high protein d、high energy and low protein
10、in order to reduce feed waste, the thickness of the feed should not exceed the trough ( ). a、1/3 b、1/2 c、2/3 d、1/4
11、the ideal laying rate of white feathered broiler breeders at 25 weeks of age is ( ). a、5% b、10% c、20% d、50%
12、what is the main transmitting vector of coccidiosis.（ ） a、faeces b、pm2.5 dust c、droplet d、feather chip
13、what are the main causes of ascites syndrome.( ) a、a lack of oxygen b、a lack o selenium c、long-term use of furazolidone d、the brood temperature is high e、high humidity in brood
14、the factors that affect the feed intake of broilers are ( ) a、the environment temperature b、feed shape c、illumination time d、palatability of feed e、farming system
15、which option is correct in describing the advantages of broiler flat breeding.( ) a、it can effectively prevent chest cysts b、reduce the risk of leg disease c、high rearing density d、high feed conversion rate e、with full feathers and good marketable when it marketed
16、reasons for the separation of male and female broilers in fast-growing broilers are ( ). a、different nutritional needs b、different growth rates c、different environmental temperature requirements d、different degree of restrict feeding
17、the age of 15-18 weeks is the period of rapid development of the reproductive system of broilers. which restriction scheme should be adopted at this stage.( ) a、loose b、feeding 6 and restrict 1 c、feeding 5 and restrict 2 d、strict e、feeding 4 and restrict 3
18、the significance of restricted feeding are ( ). a、control the body weight of broilers and avoid overweight b、controlled sexual maturity c、less abdominal fat deposition d、save the feed e、improve disease resistance
19、which are the correct descriptions of the characteristics of modern broiler production.（ ） a、scale of feeding b、product normalization c、integration of operation and management d、product simplification e、production technology standardization
20、the following ( ) belong to broiler breeds. a、avian b、cobb c、arbor acres plus d、lohmann brown classic
21、which are the correct descriptions of "satiety shock" in broilers. ( ) a、it is easy to occur on feeding day b、it can be prevented by drinking water ahead of time c、it is easy to occur under a loose feeding restriction scheme d、it has nothing to do with feeding restriction e、it is related to long light
22、which of the following is correct in describing the physiological and growth characteristics of male white - feathered broilers. （ ） a、can make good use of high protein feed b、the accumulation of body fat and abdominal fat was lower than that of hens c、the feed conversion rate of cocks was higher than that of hens at the same week of age d、feather growth is slower in cocks than in hens e、marketing time is usually earlier than the hen
23、white feather fast-growing broiler can use woodland free range rearing.( )
24、feeding restriction should be combined with light control.（ ）
25、in order to make broilers eat more and grow rapidly, 24 hours of light should be used。（ ）
26、the brood time of early fast-growing broilers is 0-3 weeks of age.
27、light time should not be too long in the rearing process of fast-growing broilers, otherwise sudden death is easily to occur.（ ）
28、the cradle of the broiler industry is france.（ ）
29、arbor acres plus (aa chicken) is a standard breed. （ ）
30、white feather fast-growing broiler farmers can raise up to 10 batches of chicken in a year.( )
31、the main purpose of rotational grazing is to keep the chickens sufficiently active.（ ）
32、if the chicken coop is not ventilated, broilers are prone to ascites syndrome.( )
33、the coccidiosis of broiler chickens is related to flat rearing.( )
34、the relative weight gain of broilers decreases with increasing age.
35、in order to improve the economic benefit, modern broiler production adopts the "all-in-all-out" feeding system. ( )
chapter 6 unit homework
1、please briefly describe what are the characteristics of modern broiler production?
2、please briefly explain the reasons and advantages of keeping broilers in separate groups?
3、please briefly describe the characteristics of the growth and development of broiler chickens?
4、describe the concept and significance of restricted feeding for broiler breeders?
5、please briefly describe the concept of free-range chickens and its advantages and disadvantages.
6、please briefly describe the causes of thoracic cysts in broiler chickens and what are the main measures?
chapter 7 feeding and management of waterfowl
chapter 7 unit test
1、how much diameter of pellet feed is the best starting feed for ducklings, which is beneficial to ducklings feeding.( ) a、0.2-0.3cm b、1-2cm c、0.5-1cm d、0.4-0.6cm
2、in order to familiarize breeding ducks with the laying environment as soon as possible, laying nest are usually placed in ( ) weeks of age during production. a、22～24 b、16~18 c、18～20 d、25～27
3、when do ducks usually lay eggs? ( ) a、1-5 a.m b、about 10 a.m c、2-3 p.m d、6-8 p.m
4、the rest period of breeding geese is generally ( ) months. a、5～9 b、3～4 c、1~2 d、not more than a month
5、usually, the proportion of unsaturated fatty acids in fatty liver is ( ). a、65%～68% b、40~52% c、60% d、13~17%
6、the seasonal requirement of force-feeding is （ ） a、spring and autumn b、autumn and winter c、winter and spring d、summer and autumn
7、compared with land birds, waterfowl ( ) is very developed. a、plumule b、contour feather c、line feather d、big scythe feather
8、shaoxing duck is a famous laying duck variety in china, with an annual egg yield of up to ( ). a、280 b、150 c、200 d、350
9、force-feeding of waterfowl can exceed（ ）times the normal intake a、3~5 times b、0.5 times c、1~2 times d、5~6 times
10、feeding time of meat duck breeds used for roasting ducks should start at（ ）week of age. a、5~6 b、1~2 c、3~4 d、7~8
11、the liver feed ratio for duck fatty liver production is（ ） a、1：25~35 b、1：5~7 c、1：10~13 d、1：1.5~2
12、the liver feed ratio for goose fatty liver production is（ ） a、1：35~40 b、1：10~15 c、1：2~3 d、1：25~30
13、the nutritional value of fatty liver is reflected in ( ) a、high content of unsaturated fatty acid b、high protein content and balanced amino acids c、high in saturated fatty acids d、high in fat-soluble vitamins
14、cherry valley duck belongs to （ ） a、meat duck b、laying duck c、meat and egg combination d、domestic duck breeds
15、shaoxing duck belongs to （ ） a、laying duck b、meat duck c、meat and egg combination d、cultivated breed
16、according to the data released by fao in 2013, the proportion of duck breeding in china of the world is about ( ). a、60% b、20% c、40% d、80%
17、adult geese may pluck velvet ( ) times a year. a、6-7 b、1-2 c、3-4 d、6
18、the main uses of geese include （ ） a、meat b、fatty liver c、velvet d、egg e、view and admire
19、what is the biological basis of cold tolerance in waterfowl（ ） a、it has developed plumule b、it has developed subcutaneous fat c、its activity is large d、it has large food intake and strong ability of self-heating e、it has developed contour feather
20、what is the correct description of the biological characteristics of waterfowl（ ） a、regularity of life b、hydrophilicity c、cold resistance d、solitude e、longevity
21、what is the reason for the low fecundity of geese（ ） a、seasonal estrus b、mate selection c、late maturity d、low hatching rate of fertilized eggs
22、what can the force-feeding technology be used for（ ） a、fatty liver production b、meat duck production c、broiler production d、laying duck production e、layer production
23、what can be used as a force-feeding（ ） a、corn b、grease c、bran d、soybean meal e、fish meal
24、force-feeding of waterfowl fatty liver production begins in （ ） a、after body maturation b、large geese aged 15-16 weeks c、broilers aged 13-15 weeks d、5 ~ 6 weeks old e、presexual maturation
25、what is the reason for the high price of fatty liver. （ ） a、high liver to feed ratio b、high death rate c、commercial speculation d、long production cycle e、difficult in technology
26、force-feeding is the key technique in the production of fatty liver.（ ）
27、muscovy ducks are sterile.( )
28、cherry valley duck is bred from peking duck. ( )
29、“chao kou” is the first time waterfowl go swimming after they come out of their shells.( )
30、duck's downn can be collected by hot water unhair removal. ( )
31、the suitable time to market for meat ducks is 6 weeks old. （ ）
32、breeding ducks need not be restricted feeding during the growing period. ( )
33、geese are not allowed to graze in the starting period .（ ）
34、generally, geese begin to brood when they lay 9~14 eggs, and their nesting behavior seriously affects egg production.
35、the quality of live plucking velvet is superior to wet plucking velvet.
36、when live plucking feathers, the whole body of a goose or duck can be plucked.( )
37、.fatty liver is red due to improper storage（ ）
38、the forage tolerance of waterfowl was higher than that of land fowl（ ）
39、the laying performance of laying ducks is similar to that of laying hens（ ）
40、semi-muscovy ducklings are sterile.
chapter 7 unit homework
1、what is plucking down feather while waterfowls are alive?
2、what is the forced-feeding technique?
3、please briefly describe the advantages of plucking waterfowl down feather alive.
4、please briefly describe the biological characteristics of waterfowl.
5、please briefly describe the causes of low reproductive capacity in geese.
final examination
final examination of poultry science
1、what is total yield of eggs of hyline w36 from onset of egg production to 80 weeks of age? ( ) kg a、22 b、15 c、13 d、25
2、what is the feed conversion ratio of modern commercial laying breed? ( ) a、2:1 b、2.8:1 c、1.5:1 d、3.5:1
3、how long does arbor acres grow to 2kg? ( ) a、35 days b、28 days c、42 day d、49 days
4、what is the feed conversion ratio of arbor acres achieving market weight? ( ) a、1.6:1 b、2:1 c、3:1 d、3.5:1
5、what is the ratio of ducks reared in china accounting for total number in the world? ( ) a、over 60 % b、over 20 % c、over 40 % d、over 80 %
6、how many chickens were reared in china in 2017? ( ) a、5 billion b、6 billion c、7 billion d、8 billion
7、which country is not in top 3 for total number of chickens according to data from fao stat? ( ) a、brazil b、us c、china d、indonesia
8、what is average consumption of eggs per person every year in china? ( ) a、18 kg b、15 kg c、12 kg d、23 kg
9、what is the proportion of poultry meat accounting for total meat consumption in china? ( ) a、21.6% b、64.9% c、8.3% d、5.2%
10、what is nutritional characteristics of eggs? ( ) a、nutrient balance b、high contents of protein c、high concentration of energy d、high contents of fat
11、what is the rank of the number of laying hens reared in china in the world? ( ) a、1 b、5 c、2 d、3
12、what is the rank of the number of broiler chickens reared in us in the world? ( ) a、1 b、5 c、2 d、3
13、which is the wrong description for the problems in chinese poultry industry? ( ) a、genetic potential of breeds is not full utilized b、despite of maintaining a large population, small scale poultry farms are the majority of poultry industry c、rearing and managing levels need be improved d、export amount of eggs rank no. 1 in the world
14、what is the digestive organ that is known as “food crusher” ? ( ) a、gizzard b、crop c、proventriculus d、liver
15、which organ or anatomic structure do chickens not have? ( ) a、urinary bladder b、crop c、air sac d、bursa of fabricius
16、how many air sacs do chickens have? ( ) a、7 b、6 c、9 d、10
17、which organ have a function of food storage for a short time? ( ) a、gizzard b、crop c、proventriculus d、liver
18、who is the ancestor of chicken? a、red junglefowl b、black-necked gallus c、gallus sonneratii d、green tailed jungle fowl
19、what is the body temperature of chicken? a、36.5 ℃ b、38 ℃ c、39 ℃ d、41 ℃
20、which is a right description about physiological characteristic of chicken? a、chicken has a higher body temperature than mammals b、the density of sperm is high, but the viability of sperm is poor c、chicken has sweat gland d、chicken has a slow metabolic rate
21、which is a right description about the function of comb? a、heat loss b、phenotype of comb have been fixed into single comb in all modern chicken breeds c、comb belongs to a skin derivative and mainly consists of connective tissue with little blood vessels d、combs of cock and hen have no significant difference in size
22、what is the purpose of white leghorn? a、egg production b、meat production c、dual-purpose d、for game or pet
23、what contribute much to high production performance of modern breeds originated from multiple way hybrid system? a、heterosis b、interaction of gene and environment c、additive effect d、epistatic effect
24、when we sex chicks using gold/silver sex-linked genes, which is the right mating mode? a、zszs×zsw b、zszs×zsw c、zszs×zsw d、zszs×zsw
25、what is the purpose of cornish? a、meat production b、egg production c、for game and pet d、dual-purpose of egg and meat
26、which is used as father line in multiple way hybrid system? a、cornish b、white leghorn c、orpington d、australorps
27、which is used as mother line in meat-type hybrid breeds? a、white plymouth rock b、white leghorn c、rhode island red d、cornish
28、which is a standard breed laying white egg? a、white recessive rock b、hyline brown c、rhode island red d、white leghorn
29、what is the slow feather defined as? a、primaries is longer than primary coverts b、primaries is shorter than primary coverts c、primaries is longer than secondaries d、primaries is shorter than secondaries
30、which is the right option below during sexing chicks using fast/slow feather genes? a、male chicks show slow feather b、to cross fast-feathered hen with slow-feathered cock c、fast feather is defined as primaries is longer than primary coverts d、to successfully sex chicks within 48 hours after hatched
31、why is the dwarf gene not used to sex identification of chicks? a、there is no difference between male and female chicks with the dw gene b、the dw is not a sex-linked gene c、the dw reduces body weight of chicks d、it is difficult to measure phenotype of chicks with the dw gene
32、the chick embryo changed from allantoic chorionic respiration to lung respiration on the ( ) day. a、19 b、12 c、10 d、15
33、the development of chicken embryo can be divided into two stages: in vivo and in vitro, in which the in vitro development period is ( ) days. a、21 b、22 c、1 d、26
34、the critical temperature of chicken embryo development is ( ). a、23.9 ℃ b、37.8°c c、26°c d、33°c
35、the characteristic of unfertilized egg is ( ) a、no blood vessels were found in the eggs after 5 days of incubation. b、after 10 days of incubation, the allantoic bag is closed. c、see hemolysis ring 8 days after hatching d、after 24 hours of incubation, no blood vessels were found in the eggs.
36、the time for the chicken embryo to move the plate (drop the plate) is ( ). a、19 days b、12 days c、14 days d、17 days
37、the period of the second death peak of chicken embryo was ( ). a、18～19 days b、3～5 days c、7～10 days d、12～14 days
38、in the hatching process of breeding eggs, three times of laying are usually arranged, and the first laying is usually carried out in ( ). a、the fifth day b、the 10th day c、17 days d、19 days
39、the appropriate humidity required for chicken embryos during incubation period is ( ) a、50～60% b、40～50% c、60～70% d、75 %
40、the appropriate thickness of an egg shell is ( ) mm. a、0.33~0.35 b、0.2~0.25 c、0.25~0.3 d、0.35~0.4
41、the suitable humidity for breeding eggs is ( ). a、75~80% b、50~55% c、55~60% d、65~70%
43、in order to keep abreast of the development of chicken embryos, non-sperm eggs and dead eggs are usually picked out on the ( ) day of hatching. a、5 b、10 c、12 d、17
44、the typical characteristic of the dead embryo egg is ( ). a、hemolytic ring on egg body surface b、the egg body is covered with fine blood vessels c、eggs have no blood vessels d、impaired chamber boundaries
45、during production, chickens should have a fertilized egg hatchability above ( ) to be qualified a、90% b、60% c、70% d、80%
46、the identification of female and male of rectum should be carried out within ( ) hours after birth a、12 b、8 c、10 d、24
47、the appropriate humidity required for chicken embryos at the hatching stage is ( ) a、75% b、60% c、90% d、80%
48、the gastrointestinal function of the chicken embryo, which can open its mouth to swallow the protein in amniotic fluid, occurs on ( ) day. a、12 days b、5 days c、19 days d、17 days
49、the appropriate light time in laying period is ( ). a、16 hours b、11 hours c、12 hours d、24 hours
50、( ) distance should be reserved for each adult laying hen when feeding in a trough a、8cm b、5cm c、15cm d、20cm
51、the adult weight of medium layer is about ( ). a、1.7 kg b、1.3 kg c、3kg d、2.5kg
52、which of the following farming methods cannot separate chicken and feces ( ) a、woodland stocking b、online nursing c、stepped cages d、full overlap cages
53、the brood period of laying hens usually refers to ( ) a、0-6 weeks b、0-3 weeks c、0-10 weeks d、0-17 weeks
54、special attention should be paid to the addition of ( ) in order to meet the nutritional requirements of chick plumage a、methionine b、lysine c、threonine d、tyrosine
55、chicks should be first used in the house a、drinking water b、open food c、disinfect d、vaccination
56、it is suitable to use ( ) as starter food for chicks a、crushed corn b、full-price granular material c、soybean meal d、oung chicken
57、the feeding principle of less feeding and more frequent feeding should be adopted in the brood period, and the appropriate feeding interval is ( ) hours a、3 b、1 c、6 d、8
58、the feeding condition of chicks can be known according to ( ) a、crop filling b、behavior c、feces d、how often you drink water
59、the correct way to drink water for chicks is ( ) a、5% glucose in water b、give chickens cool tap water c、make sure to clean the water fountain once a week. d、add antibiotics to water
60、the body temperature of newly hatched chicks is ( ) a、39.2 b、37.5 c、41 d、36.5
61、reasons for using long period of light in brood period ( ) a、get familiar with the environment so that the chicks have more time to eat and drink. b、stimulate gonadal development c、heating d、increase the time of activity and promote muscle growth.
62、the principle of ( ) should be adopted in the light time of brood stage a、diminishing b、incremental c、constant d、high before low after low
63、growing period is to control sexual maturity, and illumination time should be used ( ) a、constant b、incremental c、decline d、first low, then high
64、the appropriate humidity range in brood stage is ( ) a、56%-70% b、40-60% c、70-80% d、80 to 90 percent
65、what is correct in describing the nutritional characteristics of adult chicken feed ( )? a、the energy level is basically the same, but the protein level is lower than the chicken feed. b、high energy and high protein c、low energy and high protein d、increasing the amount of various amino acids added
66、the purpose of feeding gravel is ( ) a、help grind food b、calcium supplements c、promote food emptying d、increase satiety
67、the evenness of chicken population is related to ( ) a、initial production concentration b、egg production rate at the peak of egg production c、time to sexual maturity d、availability of feed protein
68、the qualified standard for uniformity of chicken flock is ( ) a、70-76% b、60-75% c、77% -- 83% d、>83%
69、which of the following factors affect the evenness of the flock ( ) a、feeding density b、temperature c、lighting d、ventilation
70、the vaccine usually given at birth is ( ) a、malik b、bursa of fabricius c、newcastle disease d、bird flu
71、which of the following vaccines is administered most frequently in the standby phase ( ) a、new clade and two combined seedlings b、bursa of fabricius freeze-dried seedlings c、chicken pox d、avian cholera
72、generally, the time between the first laying day and the peak laying time is ( ) weeks a、4-6 b、1-2 c、3-4 d、6
73、the normal weekly drop in laying rate after peak laying is ( ) a、0.5%-1% b、2% c、3% d、5%
74、60.under normal conditions, peak egg production of commercial layer breeds can last ( ) months a、4-7 b、1-2 c、3-4 d、8
75、the nutrient that has the greatest influence on laying performance of laying hens is ( ) a、energy b、protein c、methionine d、cysteine
76、generally, the supplemental amount of calcium in the feed of laying hens is ( ) a、3.5-4.5% b、1-2% c、1.5-2.5% d、2.5-3%
77、forms of calcium in eggshells a、calcium carbonate b、calcium phosphate c、calcium bisphosphate d、calcium bicarbonate
78、ambient temperature above ( ) will affect feeding and laying of laying hens a、27 b、24 c、30 d、33
79、the most effective cooling measures are ( ) a、wet curtain cooling method b、spray cooling method c、paint the outside of the chicken house white to radiate heat. d、open the window for ventilation.
80、forced molting should be carried out at ( ) a、late stage of egg production b、before birth c、the period of increasing laying rate d、peak egg production
81、the purpose of extending the illumination time during the laying period is ( ) a、stimulate ovulation b、make sure the chickens have enough foraging time and enough energy c、keep layers excited d、promote the absorption of calcium
82、the normal concentration of adult cocks per sperm collection is ( ) ml a、0.5-1 b、0.05-0.1 c、1-2 d、2- 3
83、the suitable ratio of natural mating between males and females is ( ) a、male: female = 1:10 b、male: female = 3:10 c、male: female = 1:25 d、male: female = 3:1
84、at present, forced molting is mainly used in ( ) a、breeding chicken b、commercial laying hens c、young chicken d、chickens at the peak of egg production
85、the purpose of increasing the ambient temperature during the operation period during the mild moulting procedure is ( ) a、to get chickens to reduce feed intake in a gentler way b、to prevent chickens from catching colds due to their weakened resistance c、increase egg production d、reduced death rate
86、which of the following statements is correct about the advantages of free-range chickens？ a、meat and eggs are of good quality b、it has higher feed conversion rate c、separated from feces, chickens are less prone to infectious diseases d、high production performance
87、sudden death syndrome usually occurs in ( ) broilers. a、fast growth b、light weight c、high quality yellow-feather d、less than 3 weeks of age
88、when the laying rate of broilers reaches ( ), it is called the first-egg age. a、5% b、6% c、7% d、8%
89、the dietary energy level of fast-growing broilers in middle and late period is ( ). a、13.4 mj/kg b、10.0 mj/kg c、12.0 mj/kg d、14.5 mj/kg
90、which description is correct about the characteristics of high quality broilers. a、meat quality is good b、fast growth c、it has higher feed conversion rate d、short growth cycle
91、variation of feed conversion rate with growth of broilers is（ ）. a、gradual increase b、gradually reduce c、remains unchanged d、first decrease then increase
92、which of the following substances is not associated with the flavor of chicken.（ ） a、vitamin b、free amino acid c、intermuscular fat d、hypoxanthine nucleotide
93、which practice is wrong when broilers are marketed .( ) a、the chicken should be caught by both wings, with a maximum of 3-4 birds allowed in each hand. b、stop feeding the chicken 4-6 hours before into the cage, but do not stop water supply. c、lift or remove all equipment before catching the chicken to avoid damaging the chicken or breaking the equipment during catching. d、keep the light as low as possible, or use blue bulbs to reduce the bird's vision. e、try to keep quiet while catching the chickens to avoid crowding caused by panicked chickens.
94、the nutritional supply characteristic of fast-growing broilers is ( ). a、high energy and high protein b、low energy and low protein c、low energy and high protein d、high energy and low protein
95、in order to reduce feed waste, the thickness of the feed should not exceed the trough a、1/3 b、1/2 c、2/3 d、1/4
96、the ideal laying rate of white feathered broiler breeders at 25 weeks of age is ( ). a、5% b、10% c、20% d、50%
97、what is the main transmitting vector of coccidiosis.（ ） a、faeces b、pm2.5 dust c、droplet d、feather chip
98、how much diameter of pellet feed is the best starting feed for ducklings, which is beneficial to ducklings feeding.( ) a、0.2-0.3cm b、1-2cm c、0.5-1cm d、0.4-0.6cm
99、in order to familiarize breeding ducks with the laying environment as soon as possible, laying nest are usually placed in ( ) weeks of age during production. a、22～24 b、16~18 c、18～20 d、25～27
100、when do ducks usually lay eggs? ( ) a、1-5 a.m b、about 10 a.m c、2-3 p.m d、6-8 p.m
101、the rest period of breeding geese is generally ( ) months. a、5～9 b、3～4 c、1~2 d、not more than a month
102、usually, the proportion of unsaturated fatty acids in fatty liver is ( ) a、65%～68% b、40~52% c、60% d、13~17%
103、the seasonal requirement of force-feeding is （ ） a、spring and autumn b、autumn and winter c、winter and spring d、summer and autumn
104、compared with land birds, waterfowl ( ) is very developed. a、plumule b、contour feather c、line feather d、big scythe feather
105、shaoxing duck is a famous laying duck variety in china, with an annual egg yield of up to ( ). a、280 b、150 c、200 d、350
106、force-feeding of waterfowl can exceed（ ）times the normal intake a、3~5 times b、0.5 times c、1~2 times d、5~6 times
107、feeding time of meat duck breeds used for roasting ducks should start at（ ）week of age. a、5~6 b、1~2 c、3~4 d、7~8
108、the liver feed ratio for duck fatty liver production is（ ） a、1：25~35 b、1：5~7 c、1：10~13 d、1：1.5~2
109、the liver feed ratio for goose fatty liver production is（ ） a、1：35~40 b、1：10~15 c、1：2~3 d、1：25~30
110、the nutritional value of fatty liver is reflected in ( ) a、high content of unsaturated fatty acid b、high protein content and balanced amino acids c、high in saturated fatty acids d、high in fat-soluble vitamins
111、cherry valley duck belongs to （ ）. a、meat duck b、laying duck c、meat and egg combination d、domestic duck breeds
112、shaoxing duck belongs to （ ） a、laying duck b、meat duck c、meat and egg combination d、cultivated breed
113、according to the data released by fao in 2013, the proportion of duck breeding in china of the world is about ( ). a、60% b、20% c、40% d、80%
114、adult geese may pluck velvet ( ) times a year. a、6-7 b、1-2 c、3-4 d、5
116、the correct description of incubation indicators is ( ). a、the fertilization rate is generally above 90% b、the hatching rate of fertilized eggs is generally above 90% c、the rate of healthy young is generally more than 90% d、the probability of producing a healthy female chick from a single breeding egg is 36.5 percent e、the probability of obtaining a healthy female chick from one breeding egg is 50 percent
117、incubator functions include ( ). a、take air b、turn the egg c、maintain a constant humidity d、maintain a constant temperature e、maintain constant light
118、internal factors affecting the incubation effect include ( ). a、quality of eggs b、nutritional intake and health of breeders c、incubation conditions d、management of breeding eggs e、incubation technology
119、disinfection methods for eggs include ( ) a、immerse with 0.1% iodine solution b、formaldehyde fumigation c、0.5% potassium permanganate leaching d、75% alcohol immersion e、0.1% lime milk immersion
120、the methods of chick sex identification include ( ) a、identification of gold and silver plumes b、identification of fast and slow plumes c、reversal anal discrimination d、crown type identification e、short stature gene identification
121、the correct description for the differentiation of male and female in chickens is ( ). a、visible reproductive eminence in roosters b、meconium should be discharged first c、hens with visible growth humps d、it should be identified within 48 hours of birth e、the genital eminence is located at the 12 o 'clock position of the anus
122、the following are the characteristics of "normal embryo egg". a、there are blood vessels on the surface of the egg body b、occasionally, embryonic eyes are visible c、18 the weather chamber has been tilted d、there are hemolytic rings in the egg e、blurred chamber boundaries
123、the correct description of the allantoic sac is ( ) a、function of the lungs during embryonic development b、grow close to the eggshell c、it has the function of absorbing calcium from eggshell d、kidney function during early embryonic development e、gradually fuses with the amniotic membrane
124、what is correct about the selection of eggs? a、moderate-sized eggs hatch the most b、eggshell color has little effect on hatchability of breeding eggs c、eggshell cleanliness affects the hatchability of breeding eggs d、oval eggs hatch best e、the larger the egg, the higher the hatching rate
125、the embryonic membranes that provide oxygen for the development of the embryo include ( ) a、allantoic chorionic membrane b、the yolk sac c、amniotic membrane d、inner eggshell membrane e、outer eggshell membrane
126、the unreasonable dietary nutrient level of laying hens during laying period is ( ) a、crude protein is 10% ~ 13% b、metabolizable energy 10 mj/kg c、calcium is 2.5% d、crude protein 16% e、metabolizable energy 12 mj/kg
127、the unreasonable feeding management of laying hens during laying period is ( ) a、light control during growth b、increase the calcium content in the feed c、free feeding during peak egg season d、feeding during peak period of egg production
128、the purpose of cutting off the chick's beak is ( ) a、prevent pecking b、avoid bringing feed into the discharge tank when feeding c、avoid bringing feed into the discharge tank when feeding d、speed up feeding
129、because chick's digestive function is weak, its diet must meet the following conditions ( ). a、feed palatability is good b、the digestibility of the feed is hig c、the feed is low in fibre d、the nutritional value of feed is high
130、in practice, adding grit to feed during growing period can improve digestibility of feed. but the addition of gravel must be careful ( ) a、additive amount b、gravel granularity c、breed of bred chicken d、the weight of a breeding chicken
131、the three stages of laying hens can be divided into ( ) a、growing period b、the brood period c、egg production period d、peak egg production e、backup period
132、the advantages of the all-in-all-out management system include ( ) a、easy to manage b、it is good for epidemic prevention. c、high feed conversion rate d、energy conservation e、it is beneficial to increase the breeding density
133、the correct description of the advantages of stocking is ( ) a、to cater to the natural habits of the chicken b、small investment c、chickens are not prone to chest and leg disease. d、high production performance e、high feed conversion rate
134、the correct description of the advantages of cage breeding is ( ). a、high stocking density b、save feed c、easy to collect eggs d、the chicken looks good. e、small investment
135、causes of poor thermoregulation in chicks ( ) a、inadequate function of the thermoregulatory center b、less subcutaneous fat and sparse feathers c、large surface area per unit weight, fast heat dissipation d、poor self-heat production capacity e、slow metabolism of nutrients
136、physiological characteristics of chicks include ( ) a、to grow and develop rapidly b、fast heart rate c、imperfect thermoregulation d、poor resistance to disease e、low feed conversion rate
137、what is correct about the description of the characteristics of the enclosed chicken coop? a、strong environmental control ability b、high energy consumption c、high breeding density d、low cost e、the internal environment is greatly influenced by the external environment.
138、what are the behaviors of chicks when the brood temperature is too high ( ) a、keep away from heat sources b、restless and restless c、increased breathing rate d、increased frequency of eating and drinking e、sleepiness
139、when the brood temperature is low, the behavior of chicks is ( ) a、trembling scream b、in a crowd c、close to a heat source d、increased breathing rate e、to move around
140、the correct description of the effect of light in poultry production is ( ) a、promote egg production b、affects the intake and drinking water of chickens c、promote molting d、stimulate appetite e、stimulate the immune system
141、what are the negative effects of high density of chicken house ( ) a、increased pressure on disease prevention and control b、it is easy to grab food c、predisposed to pecking d、the air quality is getting worse. e、early moulting time
142、the correct description of the physiological characteristics of adult chickens is ( ). a、the functions are getting better. b、complete sexual maturation c、perfect body maturation d、somatic maturation and sexual maturation are completed simultaneously e、complete body maturation first
143、measures to regulate sexual maturation include ( ) a、adjusting the lighting time b、regulating the growth rate of chickens c、adjust feeding density d、regulating the temperature of the chicken coop e、adjusting the evenness of the chicken population
144、the correct description of the source of calcium in eggshells is ( ). a、60% to 70% is provided by dietary calcium b、30% to 40% is provided by medullary bone c、all supplied by calcium in the feed d、30% to 40% is provided by cortical bone e、supplied by gravel
145、what is correct in describing the implementation purpose of the phased feeding method ( )? a、save feed b、prevention of excessive fat deposition at the later stage of egg production c、it is beneficial to improve the performance of laying eggs in the later stage of laying d、it is beneficial to improve the performance of egg production during peak period. e、it is beneficial to increase the body weight of laying hens at the later stage of laying
146、what is correct about description of appearance characteristics of high-yield laying hens is ( ) a、the comb is red and warm. b、wide interpubic distance c、anal moisture is easy to dilate d、have a strong appetite e、the feathers are neat and shiny in the late stage of laying
147、what is correct about the description of the compulsory moulting scheme under the livestock law ( ) a、the basic elements of animal husbandry method are cut off water, cut off feed, and shorten light. b、the mortality rate should be kept under 3%. c、weight should be reduced by 25-30% d、the preparation period, implementation period and recovery period e、the mortality rate should be kept below 5%.
148、what are the main causes of ascites syndrome.( ) a、a lack of oxygen b、a lack o selenium c、long-term use of furazolidone d、the brood temperature is high e、high humidity in brood
149、the factors that affect the feed intake of broilers are ( )。 a、the environment temperature b、feed shape c、illumination time d、palatability of feed e、farming system
150、which option is correct in describing the advantages of broiler flat breeding.( ) a、it can effectively prevent chest cysts b、reduce the risk of leg disease c、high rearing density d、high feed conversion rate e、with full feathers and good marketable when it marketed
151、reasons for the separation of male and female broilers in fast-growing broilers are ( ). a、different nutritional needs b、different growth rates c、different environmental temperature requirements d、different degree of restrict feeding
152、the age of 15-18 weeks is the period of rapid development of the reproductive system of broilers. which restriction scheme should be adopted at this stage.( ) a、loose b、feeding 6 and restrict 1 c、feeding 5 and restrict 2 d、strict e、feeding 4 and restrict 3
153、the significance of restricted feeding are ( ). a、control the body weight of broilers and avoid overweight b、controlled sexual maturity c、less abdominal fat deposition d、save the feed (right answer) e、improve disease resistance
154、which are the correct descriptions of the characteristics of modern broiler production.（ ） a、scale of feeding b、product normalization c、integration of operation and management d、product simplification e、production technology standardization
155、the following ( ) belong to broiler breeds. a、avian b、cobb c、arbor acres plus d、lohmann brown classic
156、which are the correct descriptions of "satiety shock" in broilers. ( ) a、it is easy to occur on feeding day b、it can be prevented by drinking water ahead of time c、it is easy to occur under a loose feeding restriction scheme d、it has nothing to do with feeding restriction e、it is related to long light
157、which of the following is correct in describing the physiological and growth characteristics of male white - feathered broilers. （ ） a、can make good use of high protein feed b、the accumulation of body fat and abdominal fat was lower than that of hens c、the feed conversion rate of cocks was higher than that of hens at the same week of age d、feather growth is slower in cocks than in hens e、marketing time is usually earlier than the hen
158、the main uses of geese include （ ）. a、meat b、fatty liver c、velvet d、egg e、view and admire
159、what is the biological basis of cold tolerance in waterfowl（ ） a、it has developed plumule b、it has developed subcutaneous fat c、its activity is large d、it has large food intake and strong ability of self-heating e、it has developed contour feather
160、what is the correct description of the biological characteristics of waterfowl（ ） a、regularity of life b、hydrophilicity c、cold resistance d、solitude e、longevity
161、what is the reason for the low fecundity of geese（ ） a、seasonal estrus b、mate selection c、late maturity d、low hatching rate of fertilized eggs
162、what can the force-feeding technology be used for（ ） a、fatty liver production b、meat duck production c、broiler production d、laying duck production e、layer production
163、what can be used as a force-feeding（） a、corn b、grease c、bran d、soybean meal e、fish meal
164、force-feeding of waterfowl fatty liver production begins in （ ） a、after body maturation b、large geese aged 15-16 weeks c、broilers aged 13-15 weeks d、5 ~ 6 weeks old e、presexual maturation
165、what is the reason for the high price of fatty liver. （ ） a、high liver to feed ratio b、high death rate c、commercial speculation d、long production cycle e、difficult in technology
166、rational drug use is the most important for control of poultry diseases ( )
167、modern poultry production has realize automatic supplies of feed and water, collection of eggs and removal of feces
168、further processing of poultry eggs and meat can increase the additional value of products （ ）
169、proteins in eggs is characterized as amino acid balance and have high digestability among animal proteins ( )
170、china is a major country rearing poultry. poultry industry contributes the most to gdp among all animal husbandry industries. ( )
171、one type of comb will exclusively exist within a breed ( )
172、the content of fiber should range from 2.5 % to 5.0 % as fiber can’t be efficiently digested in cecum
173、only right ovary and oviduct develop in chicken
174、chicks have high feed utilized efficiency as they have a long intestinal tract
175、avian erythrocyte is smaller than that of mammals and have not a nucleus
176、chick, duck and goose do not have a mature priapus
177、the jejunum and ileum are bounded by the yolk stalk (meckel’s diverticulum)
178、the yolk sac appears on the second day of incubation and its main function is to provide nutrients and oxygen to the embryo. ( )
179、the development of an embryo is divided into two stages: maternal development and extraternal development, of which the extraternal development stage is the incubation stage. ( )
180、the incubation temperature, humidity and ventilation should be increased in the later incubation period. ( )
181、on the sixth day of incubation, water from the egg white floods into the yolk, causing the yolk to grow in size. ( )
182、the optimal incubation temperature of chicken embryos is 37.8℃. ( )
183、constant temperature incubation is easier to operate, but variable temperature incubation is more in line with the rules of embryo development ( )
184、in the process of embryo incubation, the relative humidity in the incubator is too low, which will increase the water loss rate of embryo eggs ( ).
185、during the incubation of embryos, the same relative humidity is required during incubation and hatching. ( )
186、the ideal egg shape index is between 0.72 and 0.75 ( )
187、disinfection of breeding eggs for three times is beneficial to improve the hatching rate of breeding eggs. ( )
188、the amniotic membrane and the chorionic membrane are the same type of membrane, and both develop from the ectoderm of the blastocyst ( )
189、the amniotic membrane protects the embryo from mechanical impact. ( )
190、the allantoic chorionic membrane provides the embryo with nutrients from the yolk and calcium from the eggshell
191、for the first six days of incubation, an embryo is powered mainly by carbohydrates. ( )
192、temperature has a great influence on incubation. if the incubation temperature is higher than the optimal temperature needed for the development of chicken embryos, it will accelerate the development of chicken embryos and shorten the incubation period ( ).
193、the temperature and humidity of the hatching period should be slightly higher than that of the hatching period ( )
194、in all kinds of birds, the larger the embryo, the longer the incubation period.
195、the feeding of laying hens can be divided into three stages, but the time points of different breeds are different. ( )
196、there are two schemes of three-stage feeding and two-stage feeding for laying hens. ( )
197、in the production, the commonly used chicken coop has the open and the closed two kinds, the open chicken coop feeding density can be higher than the closed feeding. ( )
198、one of the reasons why chick's digestive function is not perfect is that chick's digestive enzymes secrete less. ( )
199、in order to meet the needs of chick feather growth, attention must be paid to the level of lysine in the diet. ( )
200、the key link of chick rearing is to pay attention to the time of drinking water and starting food, and the whole price feed must be used for starting food. ( )
201、a measure of the intake of chicks is the crop, which is usually 8% eight hours after opening. ( )
202、with the increase of the age of chicks, chick feed was changed to adult feed at 7 weeks of age. the protein content of adult chicken feed must be higher than that of chick feed. ( )
203、in practice, the replacement of brooding chicken feed to laying chicken feed should be done step by step, usually requiring a transition time of 5 to 6 days. ( )
204、the only light receptor in poultry is the hypothalamus. ( )
205、in production practice, if three-stage feeding is adopted, the age of 22 to 32 weeks is the increasing period of laying rate. ( )
206、chickens grow rapidly, and if nutrient supply is insufficient at the brood stage, the impact on their growth and development can be quickly compensated for by nutrient enhancement at the later stage. ( )
207、the body temperature of 22 chicks increased gradually from 4 days of age to 41 ~ 42℃ at 10 days of age, and the thermoregulation function of chicks tended to be perfect at about 3 weeks of age. ( )
208、feeding time of adult chickens should be determined according to the actual body weight and plantar length of the chickens ( )
209、granite gravel should be selected as feeding gravel ( )
210、early completion of sexual maturation is beneficial to prolonging the laying period
211、the principle of total nutrient supply for laying hens in stage feeding method is lower in the beginning and higher in the end ( )
212、light duration of laying hens should be gradually shortened with the decrease of laying rate ( )
213、utilization time of 75 roosters should start from 17 weeks of age ( )
214、the laying performance of chickens in the second laying cycle was higher than that in the first laying cycle ( )
215、the evenness mainly affected the growth of the chicken population, but had little effect on laying performance
216、white feather fast-growing broiler can use woodland free range rearing.( )
217、feeding restriction should be combined with light control.（）
218、in order to make broilers eat more and grow rapidly, 24 hours of light should be used。（ ）
219、the brood time of early fast-growing broilers is 0-3 weeks of age.
220、light time should not be too long in the rearing process of fast-growing broilers, otherwise sudden death is easily to occur.（ ）
221、the cradle of the broiler industry is france.（ ）
222、arbor acres plus (aa chicken) is a standard breed. （ ）
223、white feather fast-growing broiler farmers can raise up to 10 batches of chicken in a year.( )
224、the main purpose of rotational grazing is to keep the chickens sufficiently active.（ ）
225、if the chicken coop is not ventilated, broilers are prone to ascites syndrome.( )
226、the coccidiosis of broiler chickens is related to flat rearing.( )
227、the relative weight gain of broilers decreases with increasing age.
228、in order to improve the economic benefit, modern broiler production adopts the "all-in-all-out" feeding system. ( )
229、force-feeding is the key technique in the production of fatty liver.（）
230、muscovy ducks are sterile.( )
231、cherry valley duck is bred from peking duck. ( )
232、“chao kou” is the first time waterfowl go swimming after they come out of their shells.( )
233、duck's downn can be collected by hot water unhair removal. ( )
234、the suitable time to market for meat ducks is 6 weeks old. （ ）
235、breeding ducks need not be restricted feeding during the growing period. ( )
236、geese are not allowed to graze in the starting period .（ ）
237、generally, geese begin to brood when they lay 9~14 eggs, and their nesting behavior seriously affects egg production.
238、the quality of live plucking velvet is superior to wet plucking velvet.
239、when live plucking feathers, the whole body of a goose or duck can be plucked.( )
240、fatty liver is red due to improper storage（ ）
241、the forage tolerance of waterfowl was higher than that of land fowl（ ）
242、the laying performance of laying ducks is similar to that of laying hens（ ）
243、semi-muscovy ducklings are sterile.
final examination
final examination of poultry science
1、what is total yield of eggs of hyline w36 from onset of egg production to 80 weeks of age? ( ) kg a、22 b、15 c、13 d、25
2、what is the feed conversion ratio of modern commercial laying breed? ( ) a、2:1 b、2.8:1 c、1.5:1 d、3.5:1
3、how long does arbor acres grow to 2kg? ( ) a、35 days b、28 days c、42 day d、49 days
4、what is the feed conversion ratio of arbor acres achieving market weight? ( ) a、1.6:1 b、2:1 c、3:1 d、3.5:1
5、what is the ratio of ducks reared in china accounting for total number in the world? ( ) a、over 60 % b、over 20 % c、over 40 % d、over 80 %
6、how many chickens were reared in china in 2017? ( ) a、5 billion b、6 billion c、7 billion d、8 billion
7、which country is not in top 3 for total number of chickens according to data from fao stat? ( ) a、brazil b、us c、china d、indonesia
8、what is average consumption of eggs per person every year in china? ( ) a、18 kg b、15 kg c、12 kg d、23 kg
9、what is the proportion of poultry meat accounting for total meat consumption in china? ( ) a、21.6% b、64.9% c、8.3% d、5.2%
10、what is nutritional characteristics of eggs? ( ) a、nutrient balance b、high contents of protein c、high concentration of energy d、high contents of fat
11、what is the rank of the number of laying hens reared in china in the world? ( ) a、1 b、5 c、2 d、3
12、what is the rank of the number of broiler chickens reared in us in the world? ( ) a、1 b、5 c、2 d、3
13、which is the wrong description for the problems in chinese poultry industry? ( ) a、genetic potential of breeds is not full utilized b、despite of maintaining a large population, small scale poultry farms are the majority of poultry industry c、rearing and managing levels need be improved d、export amount of eggs rank no. 1 in the world
14、what is the digestive organ that is known as “food crusher” ? ( ) a、gizzard b、crop c、proventriculus d、liver
15、which organ or anatomic structure do chickens not have? ( ) a、urinary bladder b、crop c、air sac d、bursa of fabricius
16、how many air sacs do chickens have? ( ) a、7 b、6 c、9 d、10
17、which organ have a function of food storage for a short time? ( ) a、gizzard b、crop c、proventriculus d、liver
18、who is the ancestor of chicken? a、red junglefowl b、black-necked gallus c、gallus sonneratii d、green tailed jungle fowl
19、what is the body temperature of chicken? a、36.5 ℃ b、38 ℃ c、39 ℃ d、41 ℃
20、which is a right description about physiological characteristic of chicken? a、chicken has a higher body temperature than mammals b、the density of sperm is high, but the viability of sperm is poor c、chicken has sweat gland d、chicken has a slow metabolic rate
21、which is a right description about the function of comb? a、heat loss b、phenotype of comb have been fixed into single comb in all modern chicken breeds c、comb belongs to a skin derivative and mainly consists of connective tissue with little blood vessels d、combs of cock and hen have no significant difference in size
22、what is the purpose of white leghorn? a、egg production b、meat production c、dual-purpose d、for game or pet
23、what contribute much to high production performance of modern breeds originated from multiple way hybrid system? a、heterosis b、interaction of gene and environment c、additive effect d、epistatic effect
24、when we sex chicks using gold/silver sex-linked genes, which is the right mating mode? a、zszs×zsw b、zszs×zsw c、zszs×zsw d、zszs×zsw
25、what is the purpose of cornish? a、meat production b、egg production c、for game and pet d、dual-purpose of egg and meat
26、which is used as father line in multiple way hybrid system? a、cornish b、white leghorn c、orpington d、australorps
27、which is used as mother line in meat-type hybrid breeds? a、white plymouth rock b、white leghorn c、rhode island red d、cornish
28、which is a standard breed laying white egg? a、white recessive rock b、hyline brown c、rhode island red d、white leghorn
29、what is the slow feather defined as? a、primaries is longer than primary coverts b、primaries is shorter than primary coverts c、primaries is longer than secondaries d、primaries is shorter than secondaries
30、which is the right option below during sexing chicks using fast/slow feather genes? a、male chicks show slow feather b、to cross fast-feathered hen with slow-feathered cock c、fast feather is defined as primaries is longer than primary coverts d、to successfully sex chicks within 48 hours after hatched
31、why is the dwarf gene not used to sex identification of chicks? a、there is no difference between male and female chicks with the dw gene b、the dw is not a sex-linked gene c、the dw reduces body weight of chicks d、it is difficult to measure phenotype of chicks with the dw gene
32、the chick embryo changed from allantoic chorionic respiration to lung respiration on the ( ) day. a、19 b、12 c、10 d、15
33、the development of chicken embryo can be divided into two stages: in vivo and in vitro, in which the in vitro development period is ( ) days. a、21 b、22 c、1 d、26
34、the critical temperature of chicken embryo development is ( ). a、23.9 ℃ b、37.8°c c、26°c d、33°c
35、the characteristic of unfertilized egg is ( ) a、no blood vessels were found in the eggs after 5 days of incubation. b、after 10 days of incubation, the allantoic bag is closed. c、see hemolysis ring 8 days after hatching d、after 24 hours of incubation, no blood vessels were found in the eggs.
36、the time for the chicken embryo to move the plate (drop the plate) is ( ). a、19 days b、12 days c、14 days d、17 days
37、the period of the second death peak of chicken embryo was ( ). a、18～19 days b、3～5 days c、7～10 days d、12～14 days
38、in the hatching process of breeding eggs, three times of laying are usually arranged, and the first laying is usually carried out in ( ). a、the fifth day b、the 10th day c、17 days d、19 days
39、the appropriate humidity required for chicken embryos during incubation period is ( ) a、50～60% b、40～50% c、60～70% d、75 %
40、the appropriate thickness of an egg shell is ( ) mm. a、0.33~0.35 b、0.2~0.25 c、0.25~0.3 d、0.35~0.4
41、the suitable humidity for breeding eggs is ( ). a、75~80% b、50~55% c、55~60% d、65~70%
43、in order to keep abreast of the development of chicken embryos, non-sperm eggs and dead eggs are usually picked out on the ( ) day of hatching. a、5 b、10 c、12 d、17
44、the typical characteristic of the dead embryo egg is ( ). a、hemolytic ring on egg body surface b、the egg body is covered with fine blood vessels c、eggs have no blood vessels d、impaired chamber boundaries
45、during production, chickens should have a fertilized egg hatchability above ( ) to be qualified a、90% b、60% c、70% d、80%
46、the identification of female and male of rectum should be carried out within ( ) hours after birth a、12 b、8 c、10 d、24
47、the appropriate humidity required for chicken embryos at the hatching stage is ( ) a、75% b、60% c、90% d、80%
48、the gastrointestinal function of the chicken embryo, which can open its mouth to swallow the protein in amniotic fluid, occurs on ( ) day. a、12 days b、5 days c、19 days d、17 days
49、the appropriate light time in laying period is ( ). a、16 hours b、11 hours c、12 hours d、24 hours
50、( ) distance should be reserved for each adult laying hen when feeding in a trough a、8cm b、5cm c、15cm d、20cm
51、the adult weight of medium layer is about ( ). a、1.7 kg b、1.3 kg c、3kg d、2.5kg
52、which of the following farming methods cannot separate chicken and feces ( ) a、woodland stocking b、online nursing c、stepped cages d、full overlap cages
53、the brood period of laying hens usually refers to ( ) a、0-6 weeks b、0-3 weeks c、0-10 weeks d、0-17 weeks
54、special attention should be paid to the addition of ( ) in order to meet the nutritional requirements of chick plumage a、methionine b、lysine c、threonine d、tyrosine
55、chicks should be first used in the house a、drinking water b、open food c、disinfect d、vaccination
56、it is suitable to use ( ) as starter food for chicks a、crushed corn b、full-price granular material c、soybean meal d、oung chicken
57、the feeding principle of less feeding and more frequent feeding should be adopted in the brood period, and the appropriate feeding interval is ( ) hours a、3 b、1 c、6 d、8
58、the feeding condition of chicks can be known according to ( ) a、crop filling b、behavior c、feces d、how often you drink water
59、the correct way to drink water for chicks is ( ) a、5% glucose in water b、give chickens cool tap water c、make sure to clean the water fountain once a week. d、add antibiotics to water
60、the body temperature of newly hatched chicks is ( ) a、39.2 b、37.5 c、41 d、36.5
61、reasons for using long period of light in brood period ( ) a、get familiar with the environment so that the chicks have more time to eat and drink. b、stimulate gonadal development c、heating d、increase the time of activity and promote muscle growth.
62、the principle of ( ) should be adopted in the light time of brood stage a、diminishing b、incremental c、constant d、high before low after low
63、growing period is to control sexual maturity, and illumination time should be used ( ) a、constant b、incremental c、decline d、first low, then high
64、the appropriate humidity range in brood stage is ( ) a、56%-70% b、40-60% c、70-80% d、80 to 90 percent
65、what is correct in describing the nutritional characteristics of adult chicken feed ( )? a、the energy level is basically the same, but the protein level is lower than the chicken feed. b、high energy and high protein c、low energy and high protein d、increasing the amount of various amino acids added
66、the purpose of feeding gravel is ( ) a、help grind food b、calcium supplements c、promote food emptying d、increase satiety
67、the evenness of chicken population is related to ( ) a、initial production concentration b、egg production rate at the peak of egg production c、time to sexual maturity d、availability of feed protein
68、the qualified standard for uniformity of chicken flock is ( ) a、70-76% b、60-75% c、77% -- 83% d、>83%
69、which of the following factors affect the evenness of the flock ( ) a、feeding density b、temperature c、lighting d、ventilation
70、the vaccine usually given at birth is ( ) a、malik b、bursa of fabricius c、newcastle disease d、bird flu
71、which of the following vaccines is administered most frequently in the standby phase ( ) a、new clade and two combined seedlings b、bursa of fabricius freeze-dried seedlings c、chicken pox d、avian cholera
72、generally, the time between the first laying day and the peak laying time is ( ) weeks a、4-6 b、1-2 c、3-4 d、6
73、the normal weekly drop in laying rate after peak laying is ( ) a、0.5%-1% b、2% c、3% d、5%
74、60.under normal conditions, peak egg production of commercial layer breeds can last ( ) months a、4-7 b、1-2 c、3-4 d、8
75、the nutrient that has the greatest influence on laying performance of laying hens is ( ) a、energy b、protein c、methionine d、cysteine
76、generally, the supplemental amount of calcium in the feed of laying hens is ( ) a、3.5-4.5% b、1-2% c、1.5-2.5% d、2.5-3%
77、forms of calcium in eggshells a、calcium carbonate b、calcium phosphate c、calcium bisphosphate d、calcium bicarbonate
78、ambient temperature above ( ) will affect feeding and laying of laying hens a、27 b、24 c、30 d、33
79、the most effective cooling measures are ( ) a、wet curtain cooling method b、spray cooling method c、paint the outside of the chicken house white to radiate heat. d、open the window for ventilation.
80、forced molting should be carried out at ( ) a、late stage of egg production b、before birth c、the period of increasing laying rate d、peak egg production
81、the purpose of extending the illumination time during the laying period is ( ) a、stimulate ovulation b、make sure the chickens have enough foraging time and enough energy c、keep layers excited d、promote the absorption of calcium
82、the normal concentration of adult cocks per sperm collection is ( ) ml a、0.5-1 b、0.05-0.1 c、1-2 d、2- 3
83、the suitable ratio of natural mating between males and females is ( ) a、male: female = 1:10 b、male: female = 3:10 c、male: female = 1:25 d、male: female = 3:1
84、at present, forced molting is mainly used in ( ) a、breeding chicken b、commercial laying hens c、young chicken d、chickens at the peak of egg production
85、the purpose of increasing the ambient temperature during the operation period during the mild moulting procedure is ( ) a、to get chickens to reduce feed intake in a gentler way b、to prevent chickens from catching colds due to their weakened resistance c、increase egg production d、reduced death rate
86、which of the following statements is correct about the advantages of free-range chickens？ a、meat and eggs are of good quality b、it has higher feed conversion rate c、separated from feces, chickens are less prone to infectious diseases d、high production performance
87、sudden death syndrome usually occurs in ( ) broilers. a、fast growth b、light weight c、high quality yellow-feather d、less than 3 weeks of age
88、when the laying rate of broilers reaches ( ), it is called the first-egg age. a、5% b、6% c、7% d、8%
89、the dietary energy level of fast-growing broilers in middle and late period is ( ). a、13.4 mj/kg b、10.0 mj/kg c、12.0 mj/kg d、14.5 mj/kg
90、which description is correct about the characteristics of high quality broilers. a、meat quality is good b、fast growth c、it has higher feed conversion rate d、short growth cycle
91、variation of feed conversion rate with growth of broilers is（ ）. a、gradual increase b、gradually reduce c、remains unchanged d、first decrease then increase
92、which of the following substances is not associated with the flavor of chicken.（ ） a、vitamin b、free amino acid c、intermuscular fat d、hypoxanthine nucleotide
93、which practice is wrong when broilers are marketed .( ) a、the chicken should be caught by both wings, with a maximum of 3-4 birds allowed in each hand. b、stop feeding the chicken 4-6 hours before into the cage, but do not stop water supply. c、lift or remove all equipment before catching the chicken to avoid damaging the chicken or breaking the equipment during catching. d、keep the light as low as possible, or use blue bulbs to reduce the bird's vision. e、try to keep quiet while catching the chickens to avoid crowding caused by panicked chickens.
94、the nutritional supply characteristic of fast-growing broilers is ( ). a、high energy and high protein b、low energy and low protein c、low energy and high protein d、high energy and low protein
95、in order to reduce feed waste, the thickness of the feed should not exceed the trough a、1/3 b、1/2 c、2/3 d、1/4
96、the ideal laying rate of white feathered broiler breeders at 25 weeks of age is ( ). a、5% b、10% c、20% d、50%
97、what is the main transmitting vector of coccidiosis.（ ） a、faeces b、pm2.5 dust c、droplet d、feather chip
98、how much diameter of pellet feed is the best starting feed for ducklings, which is beneficial to ducklings feeding.( ) a、0.2-0.3cm b、1-2cm c、0.5-1cm d、0.4-0.6cm
99、in order to familiarize breeding ducks with the laying environment as soon as possible, laying nest are usually placed in ( ) weeks of age during production. a、22～24 b、16~18 c、18～20 d、25～27
100、when do ducks usually lay eggs? ( ) a、1-5 a.m b、about 10 a.m c、2-3 p.m d、6-8 p.m
101、the rest period of breeding geese is generally ( ) months. a、5～9 b、3～4 c、1~2 d、not more than a month
102、usually, the proportion of unsaturated fatty acids in fatty liver is ( ) a、65%～68% b、40~52% c、60% d、13~17%
103、the seasonal requirement of force-feeding is （ ） a、spring and autumn b、autumn and winter c、winter and spring d、summer and autumn
104、compared with land birds, waterfowl ( ) is very developed. a、plumule b、contour feather c、line feather d、big scythe feather
105、shaoxing duck is a famous laying duck variety in china, with an annual egg yield of up to ( ). a、280 b、150 c、200 d、350
106、force-feeding of waterfowl can exceed（ ）times the normal intake a、3~5 times b、0.5 times c、1~2 times d、5~6 times
107、feeding time of meat duck breeds used for roasting ducks should start at（ ）week of age. a、5~6 b、1~2 c、3~4 d、7~8
108、the liver feed ratio for duck fatty liver production is（ ） a、1：25~35 b、1：5~7 c、1：10~13 d、1：1.5~2
109、the liver feed ratio for goose fatty liver production is（ ） a、1：35~40 b、1：10~15 c、1：2~3 d、1：25~30
110、the nutritional value of fatty liver is reflected in ( ) a、high content of unsaturated fatty acid b、high protein content and balanced amino acids c、high in saturated fatty acids d、high in fat-soluble vitamins
111、cherry valley duck belongs to （ ）. a、meat duck b、laying duck c、meat and egg combination d、domestic duck breeds
112、shaoxing duck belongs to （ ） a、laying duck b、meat duck c、meat and egg combination d、cultivated breed
113、according to the data released by fao in 2013, the proportion of duck breeding in china of the world is about ( ). a、60% b、20% c、40% d、80%
114、adult geese may pluck velvet ( ) times a year. a、6-7 b、1-2 c、3-4 d、5
116、the correct description of incubation indicators is ( ). a、the fertilization rate is generally above 90% b、the hatching rate of fertilized eggs is generally above 90% c、the rate of healthy young is generally more than 90% d、the probability of producing a healthy female chick from a single breeding egg is 36.5 percent e、the probability of obtaining a healthy female chick from one breeding egg is 50 percent
117、incubator functions include ( ). a、take air b、turn the egg c、maintain a constant humidity d、maintain a constant temperature e、maintain constant light
118、internal factors affecting the incubation effect include ( ). a、quality of eggs b、nutritional intake and health of breeders c、incubation conditions d、management of breeding eggs e、incubation technology
119、disinfection methods for eggs include ( ) a、immerse with 0.1% iodine solution b、formaldehyde fumigation c、0.5% potassium permanganate leaching d、75% alcohol immersion e、0.1% lime milk immersion
120、the methods of chick sex identification include ( ) a、identification of gold and silver plumes b、identification of fast and slow plumes c、reversal anal discrimination d、crown type identification e、short stature gene identification
121、the correct description for the differentiation of male and female in chickens is ( ). a、visible reproductive eminence in roosters b、meconium should be discharged first c、hens with visible growth humps d、it should be identified within 48 hours of birth e、the genital eminence is located at the 12 o 'clock position of the anus
122、the following are the characteristics of "normal embryo egg". a、there are blood vessels on the surface of the egg body b、occasionally, embryonic eyes are visible c、18 the weather chamber has been tilted d、there are hemolytic rings in the egg e、blurred chamber boundaries
123、the correct description of the allantoic sac is ( ) a、function of the lungs during embryonic development b、grow close to the eggshell c、it has the function of absorbing calcium from eggshell d、kidney function during early embryonic development e、gradually fuses with the amniotic membrane
124、what is correct about the selection of eggs? a、moderate-sized eggs hatch the most b、eggshell color has little effect on hatchability of breeding eggs c、eggshell cleanliness affects the hatchability of breeding eggs d、oval eggs hatch best e、the larger the egg, the higher the hatching rate
125、the embryonic membranes that provide oxygen for the development of the embryo include ( ) a、allantoic chorionic membrane b、the yolk sac c、amniotic membrane d、inner eggshell membrane e、outer eggshell membrane
126、the unreasonable dietary nutrient level of laying hens during laying period is ( ) a、crude protein is 10% ~ 13% b、metabolizable energy 10 mj/kg c、calcium is 2.5% d、crude protein 16% e、metabolizable energy 12 mj/kg
127、the unreasonable feeding management of laying hens during laying period is ( ) a、light control during growth b、increase the calcium content in the feed c、free feeding during peak egg season d、feeding during peak period of egg production
128、the purpose of cutting off the chick's beak is ( ) a、prevent pecking b、avoid bringing feed into the discharge tank when feeding c、avoid bringing feed into the discharge tank when feeding d、speed up feeding
129、because chick's digestive function is weak, its diet must meet the following conditions ( ). a、feed palatability is good b、the digestibility of the feed is hig c、the feed is low in fibre d、the nutritional value of feed is high
130、in practice, adding grit to feed during growing period can improve digestibility of feed. but the addition of gravel must be careful ( ) a、additive amount b、gravel granularity c、breed of bred chicken d、the weight of a breeding chicken
131、the three stages of laying hens can be divided into ( ) a、growing period b、the brood period c、egg production period d、peak egg production e、backup period
132、the advantages of the all-in-all-out management system include ( ) a、easy to manage b、it is good for epidemic prevention. c、high feed conversion rate d、energy conservation e、it is beneficial to increase the breeding density
133、the correct description of the advantages of stocking is ( ) a、to cater to the natural habits of the chicken b、small investment c、chickens are not prone to chest and leg disease. d、high production performance e、high feed conversion rate
134、the correct description of the advantages of cage breeding is ( ). a、high stocking density b、save feed c、easy to collect eggs d、the chicken looks good. e、small investment
135、causes of poor thermoregulation in chicks ( ) a、inadequate function of the thermoregulatory center b、less subcutaneous fat and sparse feathers c、large surface area per unit weight, fast heat dissipation d、poor self-heat production capacity e、slow metabolism of nutrients
136、physiological characteristics of chicks include ( ) a、to grow and develop rapidly b、fast heart rate c、imperfect thermoregulation d、poor resistance to disease e、low feed conversion rate
137、what is correct about the description of the characteristics of the enclosed chicken coop? a、strong environmental control ability b、high energy consumption c、high breeding density d、low cost e、the internal environment is greatly influenced by the external environment.
138、what are the behaviors of chicks when the brood temperature is too high ( ) a、keep away from heat sources b、restless and restless c、increased breathing rate d、increased frequency of eating and drinking e、sleepiness
139、when the brood temperature is low, the behavior of chicks is ( ) a、trembling scream b、in a crowd c、close to a heat source d、increased breathing rate e、to move around
140、the correct description of the effect of light in poultry production is ( ) a、promote egg production b、affects the intake and drinking water of chickens c、promote molting d、stimulate appetite e、stimulate the immune system
141、what are the negative effects of high density of chicken house ( ) a、increased pressure on disease prevention and control b、it is easy to grab food c、predisposed to pecking d、the air quality is getting worse. e、early moulting time
142、the correct description of the physiological characteristics of adult chickens is ( ). a、the functions are getting better. b、complete sexual maturation c、perfect body maturation d、somatic maturation and sexual maturation are completed simultaneously e、complete body maturation first
143、measures to regulate sexual maturation include ( ) a、adjusting the lighting time b、regulating the growth rate of chickens c、adjust feeding density d、regulating the temperature of the chicken coop e、adjusting the evenness of the chicken population
144、the correct description of the source of calcium in eggshells is ( ). a、60% to 70% is provided by dietary calcium b、30% to 40% is provided by medullary bone c、all supplied by calcium in the feed d、30% to 40% is provided by cortical bone e、supplied by gravel
145、what is correct in describing the implementation purpose of the phased feeding method ( )? a、save feed b、prevention of excessive fat deposition at the later stage of egg production c、it is beneficial to improve the performance of laying eggs in the later stage of laying d、it is beneficial to improve the performance of egg production during peak period. e、it is beneficial to increase the body weight of laying hens at the later stage of laying
146、what is correct about description of appearance characteristics of high-yield laying hens is ( ) a、the comb is red and warm. b、wide interpubic distance c、anal moisture is easy to dilate d、have a strong appetite e、the feathers are neat and shiny in the late stage of laying
147、what is correct about the description of the compulsory moulting scheme under the livestock law ( ) a、the basic elements of animal husbandry method are cut off water, cut off feed, and shorten light. b、the mortality rate should be kept under 3%. c、weight should be reduced by 25-30% d、the preparation period, implementation period and recovery period e、the mortality rate should be kept below 5%.
148、what are the main causes of ascites syndrome.( ) a、a lack of oxygen b、a lack o selenium c、long-term use of furazolidone d、the brood temperature is high e、high humidity in brood
149、the factors that affect the feed intake of broilers are ( )。 a、the environment temperature b、feed shape c、illumination time d、palatability of feed e、farming system
150、which option is correct in describing the advantages of broiler flat breeding.( ) a、it can effectively prevent chest cysts b、reduce the risk of leg disease c、high rearing density d、high feed conversion rate e、with full feathers and good marketable when it marketed
151、reasons for the separation of male and female broilers in fast-growing broilers are ( ). a、different nutritional needs b、different growth rates c、different environmental temperature requirements d、different degree of restrict feeding
152、the age of 15-18 weeks is the period of rapid development of the reproductive system of broilers. which restriction scheme should be adopted at this stage.( ) a、loose b、feeding 6 and restrict 1 c、feeding 5 and restrict 2 d、strict e、feeding 4 and restrict 3
153、the significance of restricted feeding are ( ). a、control the body weight of broilers and avoid overweight b、controlled sexual maturity c、less abdominal fat deposition d、save the feed (right answer) e、improve disease resistance
154、which are the correct descriptions of the characteristics of modern broiler production.（ ） a、scale of feeding b、product normalization c、integration of operation and management d、product simplification e、production technology standardization
155、the following ( ) belong to broiler breeds. a、avian b、cobb c、arbor acres plus d、lohmann brown classic
156、which are the correct descriptions of "satiety shock" in broilers. ( ) a、it is easy to occur on feeding day b、it can be prevented by drinking water ahead of time c、it is easy to occur under a loose feeding restriction scheme d、it has nothing to do with feeding restriction e、it is related to long light
157、which of the following is correct in describing the physiological and growth characteristics of male white - feathered broilers. （ ） a、can make good use of high protein feed b、the accumulation of body fat and abdominal fat was lower than that of hens c、the feed conversion rate of cocks was higher than that of hens at the same week of age d、feather growth is slower in cocks than in hens e、marketing time is usually earlier than the hen
158、the main uses of geese include （ ）. a、meat b、fatty liver c、velvet d、egg e、view and admire
159、what is the biological basis of cold tolerance in waterfowl（ ） a、it has developed plumule b、it has developed subcutaneous fat c、its activity is large d、it has large food intake and strong ability of self-heating e、it has developed contour feather
160、what is the correct description of the biological characteristics of waterfowl（ ） a、regularity of life b、hydrophilicity c、cold resistance d、solitude e、longevity
161、what is the reason for the low fecundity of geese（ ） a、seasonal estrus b、mate selection c、late maturity d、low hatching rate of fertilized eggs
162、what can the force-feeding technology be used for（ ） a、fatty liver production b、meat duck production c、broiler production d、laying duck production e、layer production
163、what can be used as a force-feeding（） a、corn b、grease c、bran d、soybean meal e、fish meal
164、force-feeding of waterfowl fatty liver production begins in （ ） a、after body maturation b、large geese aged 15-16 weeks c、broilers aged 13-15 weeks d、5 ~ 6 weeks old e、presexual maturation
165、what is the reason for the high price of fatty liver. （ ） a、high liver to feed ratio b、high death rate c、commercial speculation d、long production cycle e、difficult in technology
166、rational drug use is the most important for control of poultry diseases ( )
167、modern poultry production has realize automatic supplies of feed and water, collection of eggs and removal of feces
168、further processing of poultry eggs and meat can increase the additional value of products （ ）
169、proteins in eggs is characterized as amino acid balance and have high digestability among animal proteins ( )
170、china is a major country rearing poultry. poultry industry contributes the most to gdp among all animal husbandry industries. ( )
171、one type of comb will exclusively exist within a breed ( )
172、the content of fiber should range from 2.5 % to 5.0 % as fiber can’t be efficiently digested in cecum
173、only right ovary and oviduct develop in chicken
174、chicks have high feed utilized efficiency as they have a long intestinal tract
175、avian erythrocyte is smaller than that of mammals and have not a nucleus
176、chick, duck and goose do not have a mature priapus
177、the jejunum and ileum are bounded by the yolk stalk (meckel’s diverticulum)
178、the yolk sac appears on the second day of incubation and its main function is to provide nutrients and oxygen to the embryo. ( )
179、the development of an embryo is divided into two stages: maternal development and extraternal development, of which the extraternal development stage is the incubation stage. ( )
180、the incubation temperature, humidity and ventilation should be increased in the later incubation period. ( )
181、on the sixth day of incubation, water from the egg white floods into the yolk, causing the yolk to grow in size. ( )
182、the optimal incubation temperature of chicken embryos is 37.8℃. ( )
183、constant temperature incubation is easier to operate, but variable temperature incubation is more in line with the rules of embryo development ( )
184、in the process of embryo incubation, the relative humidity in the incubator is too low, which will increase the water loss rate of embryo eggs ( ).
185、during the incubation of embryos, the same relative humidity is required during incubation and hatching. ( )
186、the ideal egg shape index is between 0.72 and 0.75 ( )
187、disinfection of breeding eggs for three times is beneficial to improve the hatching rate of breeding eggs. ( )
188、the amniotic membrane and the chorionic membrane are the same type of membrane, and both develop from the ectoderm of the blastocyst ( )
189、the amniotic membrane protects the embryo from mechanical impact. ( )
190、the allantoic chorionic membrane provides the embryo with nutrients from the yolk and calcium from the eggshell
191、for the first six days of incubation, an embryo is powered mainly by carbohydrates. ( )
192、temperature has a great influence on incubation. if the incubation temperature is higher than the optimal temperature needed for the development of chicken embryos, it will accelerate the development of chicken embryos and shorten the incubation period ( ).
193、the temperature and humidity of the hatching period should be slightly higher than that of the hatching period ( )
194、in all kinds of birds, the larger the embryo, the longer the incubation period.
195、the feeding of laying hens can be divided into three stages, but the time points of different breeds are different. ( )
196、there are two schemes of three-stage feeding and two-stage feeding for laying hens. ( )
197、in the production, the commonly used chicken coop has the open and the closed two kinds, the open chicken coop feeding density can be higher than the closed feeding. ( )
198、one of the reasons why chick's digestive function is not perfect is that chick's digestive enzymes secrete less. ( )
199、in order to meet the needs of chick feather growth, attention must be paid to the level of lysine in the diet. ( )
200、the key link of chick rearing is to pay attention to the time of drinking water and starting food, and the whole price feed must be used for starting food. ( )
201、a measure of the intake of chicks is the crop, which is usually 8% eight hours after opening. ( )
202、with the increase of the age of chicks, chick feed was changed to adult feed at 7 weeks of age. the protein content of adult chicken feed must be higher than that of chick feed. ( )
203、in practice, the replacement of brooding chicken feed to laying chicken feed should be done step by step, usually requiring a transition time of 5 to 6 days. ( )
204、the only light receptor in poultry is the hypothalamus. ( )
205、in production practice, if three-stage feeding is adopted, the age of 22 to 32 weeks is the increasing period of laying rate. ( )
206、chickens grow rapidly, and if nutrient supply is insufficient at the brood stage, the impact on their growth and development can be quickly compensated for by nutrient enhancement at the later stage. ( )
207、the body temperature of 22 chicks increased gradually from 4 days of age to 41 ~ 42℃ at 10 days of age, and the thermoregulation function of chicks tended to be perfect at about 3 weeks of age. ( )
208、feeding time of adult chickens should be determined according to the actual body weight and plantar length of the chickens ( )
209、granite gravel should be selected as feeding gravel ( )
210、early completion of sexual maturation is beneficial to prolonging the laying period
211、the principle of total nutrient supply for laying hens in stage feeding method is lower in the beginning and higher in the end ( )
212、light duration of laying hens should be gradually shortened with the decrease of laying rate ( )
213、utilization time of 75 roosters should start from 17 weeks of age ( )
214、the laying performance of chickens in the second laying cycle was higher than that in the first laying cycle ( )
215、the evenness mainly affected the growth of the chicken population, but had little effect on laying performance
216、white feather fast-growing broiler can use woodland free range rearing.( )
217、feeding restriction should be combined with light control.（）
218、in order to make broilers eat more and grow rapidly, 24 hours of light should be used。（ ）
219、the brood time of early fast-growing broilers is 0-3 weeks of age.
220、light time should not be too long in the rearing process of fast-growing broilers, otherwise sudden death is easily to occur.（ ）
221、the cradle of the broiler industry is france.（ ）
222、arbor acres plus (aa chicken) is a standard breed. （ ）
223、white feather fast-growing broiler farmers can raise up to 10 batches of chicken in a year.( )
224、the main purpose of rotational grazing is to keep the chickens sufficiently active.（ ）
225、if the chicken coop is not ventilated, broilers are prone to ascites syndrome.( )
226、the coccidiosis of broiler chickens is related to flat rearing.( )
227、the relative weight gain of broilers decreases with increasing age.
228、in order to improve the economic benefit, modern broiler production adopts the "all-in-all-out" feeding system. ( )
229、force-feeding is the key technique in the production of fatty liver.（）
230、muscovy ducks are sterile.( )
231、cherry valley duck is bred from peking duck. ( )
232、“chao kou” is the first time waterfowl go swimming after they come out of their shells.( )
233、duck's downn can be collected by hot water unhair removal. ( )
234、the suitable time to market for meat ducks is 6 weeks old. （ ）
235、breeding ducks need not be restricted feeding during the growing period. ( )
236、geese are not allowed to graze in the starting period .（ ）
237、generally, geese begin to brood when they lay 9~14 eggs, and their nesting behavior seriously affects egg production.
238、the quality of live plucking velvet is superior to wet plucking velvet.
239、when live plucking feathers, the whole body of a goose or duck can be plucked.( )
240、fatty liver is red due to improper storage（ ）
241、the forage tolerance of waterfowl was higher than that of land fowl（ ）
242、the laying performance of laying ducks is similar to that of laying hens（ ）