【摘要】 试验旨在研究热应激条件下日粮添加不同类型的γ-氨基丁酸对黄羽肉鸡生长性能的影响。将1 680只22日龄的黄羽肉鸡随机分为3个组(对照组，发酵型γ-氨基丁酸组，合成型γ-氨基丁酸组),每组8个重复，每个重复70只鸡。进行为期21 d的试验。结果表明：热应激条件下日粮中添加30 mg/kg发酵型γ-氨基丁酸能显著(P<0.01)改善肉鸡的日均增重及耗料增重比，日粮中添加30 mg/kg合成型γ-氨基丁酸组对肉鸡的日均增重及耗料增重比均无显著(P>0.05)的改善作用。综上所述，热应激条件下日粮添加30 mg/kg发酵型γ-氨基丁酸可改善黄羽肉鸡生长性能。更多还原

【Abstract】 The aim of this experiment is to investigate the effect of adding different types of γ-aminobutyric acid to the daily ration on the growth performance of yellow feathered broiler chicken under heat stress conditions.Altogether 1,680 22-day-old yellow feathered broiler chicken were randomized into three groups(namely control group, fermented γ-aminobutyric acid group, and synthesized γ-aminobutyric acid group),with 8 replicates in each group and 72 chickens in each replicate to undergo a 21-day experiment.The results showed that adding 30 mg/kg of fermented γ-aminobutyric acid to the daily ration under heat stress conditions could significantly improve the average daily gain(ADG) and the feed to gain ratio(F/G) of broiler chicken(P<0.01).By contrast, adding 30 mg/kg synthesized γ-aminobutyric acid to the daily ratio failed to significantly improve the ADG or F/G of the broiler chicken(P>0.05).Taken together, adding 30 mg/kg of fermented γ-aminobutyric acid to the daily ration under heat stress conditions could improve the growth performance of yellow feathered broiler chicken.更多还原