动物营养学报2026，Vol.38Issue(5)：3417-3430,14.DOI:10.12418/CJAN2026.273
育雏期雪域白鸡的理想氨基酸模式研究
Ideal Amino Acid Pattern for Xueyu White Chickens during Brooding Period
摘要
Abstract
This study aimed to investigate the ideal amino acid(AA)pattern for Xueyu white chickens during brooding period.In experiment 1,the AA partial deletion method was used.A total of 176 fifteen-day-old fe-male Xueyu white chicks were used.Sixteen birds(8 replicates of 2 birds each)were euthanized at the start of the experiment for initial body composition determination.The remaining 160 birds were randomly assigned to 10 groups,each group with 8 replicates of 2 birds per replicate.The positive control(PC)group was fed a corn-soybean meal diet containing 18.84%intact protein and 20.05%crude protein(CP)formulated according to the recommended nutrient requirements for growing laying hens in the Chicken Feeding Standard(NY/T 33-2004).Low-protein group 1(LC1 group)was fed a corn-soybean meal diet containing 18.22%intact protein,with the contents of six target essential amino acids[EAAs:lysine(Lys),methionine(Met),argi-nine(Arg),threonine(Thr),valine(Val),isoleucine(Ile)]meeting 100%of the recommended levels.Low-protein group 2(LC2 group)was fed a corn-soybean meal diet containing 14.42%intact protein,with the six target EAAs meeting 80%of the recommended levels.The balanced diet group(BD group)was fed a corn-soybean meal balanced diet formulated by adding crystalline AAs to the diet of LC2 group,ensuring that the six target EAAs met 100%of the recommended levels.The remaining six groups were EAA partial deletion groups(Lys,Met,Arg,Thr,Val and Ile groups),fed corn-soybean meal diets in which 20%of the corre-sponding EAA was deleted by reducing the addition of crystalline AAs based on the BD diet.The experiment lasted for 21 days.In experiment 2,the standardized ileal AA digestibility of corn and soybean meal was deter-mined.A total of 126 twenty-two-day-old female Xueyu white chicks were randomly divided into 3 groups with 6 replicates per group and 7 birds per replicate.The three groups were fed a corn diet,a soybean meal diet or a nitrogen-free diet for 4 days,respectively.The results showed as follows:nitrogen retention(NR)and nitro-gen retention rate in the BD group were significantly higher than those in the PC,LC1 and LC2 groups(P＜0.05).Compared with the BD group,both NR and nitrogen retention rate decreased to some extent in the six EAA partial deletion groups,among which NR in the Thr group and nitrogen retention rate in the Met group decreased significantly(P＜0.05).Among the six EAA partial deletion groups,the Met group had the lowest nitrogen retention rate compared with the BD group,indicating that Met was the first limiting AA in the bal-anced diet for Xueyu white chickens during the brooding period.Based on NR,the post-absorptive ideal AAs pattern was calculated as Lys∶Met∶Arg∶Thr∶Val∶Ile=100∶41∶117∶75∶72∶69.In this pattern,the ratios of Met and Thr relative to Lys were 11%and 14%higher than those recommended in the Chicken Feeding Stand-ard(NY/T 33-2004),respectively.By determining the standardized ileal AA digestibility of corn and soy-bean meal,the corrected ideal digestible AAs pattern of the balanced diet was obtained as Lys∶Met∶Arg∶Thr∶Val∶Ile=100∶43∶126∶78∶75∶72.In conclusion,this study established the ideal AA pattern for Xueyu white chickens during the brooding period.This pattern indicates higher requirements for Met and Thr relative to Lys compared with the Chicken Feeding Standard(NY/T 33-2004).These results provide a scientific basis for precise nutrition and feed formulation for Xueyu white chickens during the brooding period.[Chinese Journal of Animal Nutrition,2026,38(5):3417-3430]关键词
雪域白鸡/理想氨基酸模式/氨基酸部分扣除法/氮存留/标准回肠氨基酸消化率Key words
Xueyu white chickens/ideal amino acid pattern/amino acid partial deletion method/nitrogen re-tention/standardized ileal amino acid digestibility分类
农业科技引用本文复制引用
刘振华,玄玥,李姗姗,穆亚东,白世平,赵小玲,徐梦琦,张克英,冯静,王建萍,丁雪梅,曾秋凤,刘艳..育雏期雪域白鸡的理想氨基酸模式研究[J].动物营养学报,2026,38(5):3417-3430,14.基金项目
国家重点研发计划项目(2022YFD1600902) （2022YFD1600902）
新疆维吾尔自治区重点研发计划(2022B02057-2) （2022B02057-2）
新疆维吾尔自治区"天山英才"计划项目 （）
