饲料研究2024，Vol.47Issue(20)：40-45,6.DOI:10.13557/j.cnki.issn1002-2813.2024.20.008
低蛋白饲粮添加复合酶对白羽肉鸡生长性能和氮代谢的影响
Effects of low-protein diet supplemented with composite enzymes on growth performance and nitrogen metabolism of white feather broilers
摘要
Abstract
The experiment aimed to investigate the effects of adding composite enzymes to low-protein diets on the growth performance,serum biochemical indicators,digestive enzyme activities,nutrient apparent metabolic rate,and nitrogen metabolism of white feathered broilers.A total of 288 one-day-old white feathered broilers were randomly divided into six groups,with six replicates per group and eight broilers per replicate.The experimental period was 42 days.The experimental diet was designed in two stages:1～21 days and 22～42 days.The control group(T1 group)was fed a basal diet with crude protein content of 21.28％and 20.09％,respectively.The T2 group was the low-protein diet with crude protein content of 20.24％and 19.08％.The T3 and T4 groups were fed low-protein diets supplemented with 100 and 200 mg/kg of composite enzyme A,respectively,and the T5 and T6 groups were fed low-protein diets supplemented with 100 and 200 mg/kg of composite enzyme B,respectively.The results showed that during the periods of 22～42 and 1～42 days,the feed conversion ratio of T2,T5,and T6 groups was lower than that of the T1 group(P＞0.05).At 42 days,the trypsin activity in the duodenum of the T4 group was significantly higher than that of other groups(P＜0.05),the nutrient apparent metabolic rate of dry matter in the T6 group was significantly higher than that of the T1,T3,and T4 groups(P＜0.05),the apparent metabolic ratio of crude protein was significantly higher than that of the T1 and T4 groups(P＜0.05),and the nitrogen excretion rate was significantly lower than that of the T1 and T4 groups(P＜0.05).The study indicates that the addition of composite enzymes to the diet can improve the impact of low-protein diets on the growth performance and digestive enzyme activities of white feathered broilers during the later stages of growth,increase the nutrient apparent metabolic rate of crude protein,reduce nitrogen excretion,and the addition effect of the T6 group is relatively better.关键词
复合酶/低蛋白饲粮/白羽肉鸡/生长性能/氮代谢Key words
composite enzymes/low-protein diet/white feathered broilers/growth performance/nitrogen metabolism分类
农业科技引用本文复制引用
岳稳,李忠荣,靳伟刚,刘景,陈鑫珠..低蛋白饲粮添加复合酶对白羽肉鸡生长性能和氮代谢的影响[J].饲料研究,2024,47(20):40-45,6.基金项目
福建省人民政府·中国农业科学院农业高质量发展超越"5511"协同创新工程项目(项目编号:XTCXGC2021012、XTCXGC2021019) （项目编号:XTCXGC2021012、XTCXGC2021019）
福建省家畜传染病防治与生物技术重点实验室开放课题(项目编号:ZDSYS2023006) （项目编号:ZDSYS2023006）
福建省海洋酶工程重点实验室开放课题 （）
