南京农业大学学报2025，Vol.48Issue(2)：427-435,9.DOI:10.7685/jnau.202402016
28日龄白羽肉鸡不同来源小麦标准回肠氨基酸消化率评定及其预测方程研究
Evaluation of standardized ileal amino acid digestibility of 28-day-old white-feathered broilers from different sources of wheat and establishment of its predictive equation
摘要
Abstract
[Objectives]The aim of this experiment was to determine the standardized ileal amino acid digestibility(SIDAA)of wheat in 28-day-old white-feathered broiler chickens,and to establish multiple linear regression equations between the conventional nutritional content of wheat and the standardized ileal amino acid digestibility of broiler chickens.[Methods]A total of 330 healthy white-feathered Arbor Acres(AA)broilers of 28-day-old with the similar body weight were randomly divided into 11 groups with 6 replicates in each group and 5 chickens in each replicate.One kind of nitrogen-free diet and 10 kinds of wheat diets were fed for 3 days.[Results]The average values of bulk density,and the content of gross energe(GE),dry matter(DM),crude protein(CP),ether extract(EE),crude ash(Ash),coarse fiber(CF),neutral detergent fiber(NDF),acid detergent fiber(ADF),nitrogen-free extract(NFE),starch,hemicellulose,phytic acid for 10 different sources of wheat were 832 g·L-1,17.6 MJ·kg-1,88.42%,14.33%,1.50%,1.65%,2.29%,12.61%,3.14%,68.46%,55.96%,9.48%,and 6.58%,respectively,which were similar to China's wheat database.Among them,ADF had the highest coefficient of variation(39.15%)and total energy coefficient of variation(1.10%)was the lowest.The amino acid content of the raw materials varied greatly,with a coefficient of variation mostly between 13.17%and 21.02%,with only the coefficient of variation of Pro and Tyr exceeded 20%.Among the indispensable amino acids,Phe had the highest SID(95.18%),while Lys had the lowest SID(86.08%);among dispensable amino acids,Glu had the highest SID(97.26%)and Asp had the lowest SID(86.87%).We established 12 amino acid SID prediction equations for 28-day-old white-feathered broiler chickens with wheat,among which SID Trp had the highest fitting degree(R2=0.985)and SID Met had the lowest fitting degree(R2=0.323).[Conclusions]The coefficient of variation for the conventional nutritional components,anti-nutritional factors,and amino acid content of 10 types of wheat collected in this experiment was relatively large.Glutamate in wheat had the highest digestibility in 28-day-old white-feathered broilers,and the SID multiple linear regression prediction equation for tryptophan was the best.关键词
小麦/白羽肉鸡/标准回肠氨基酸消化率/预测方程Key words
wheat/white-feathered broilers/standardized ileal amino acid digestibility(SIDAA)/prediction equations分类
农业科技引用本文复制引用
汪子怡,杭振宇,张林,邢通,赵良,高峰..28日龄白羽肉鸡不同来源小麦标准回肠氨基酸消化率评定及其预测方程研究[J].南京农业大学学报,2025,48(2):427-435,9.基金项目
国家重点研发计划项目(2021YFD1300203) （2021YFD1300203）
江苏现代农业产业技术体系建设专项(JATS[2023]418) （JATS[2023]418）
