中国畜牧杂志

2022, v.58(05) 158-162

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不同水平色氨酸对轻型蛋鸡育雏前期生长性能和血清生化指标的影响
Effects of Different Tryptophan Levels on Growth Performance and Serum Biochemical Indexes of Light Laying Hens

石小童;卿寒睿;高晏;马秋刚;赵丽红;张建云;
SHI Xiaotong;QING Hanrui;GAO Yan;MA Qiugang;ZHAO Lihong;ZHANG Jianyun;State Key Laboratory of Animal Nutrition,College of Animal Science and Technology,China Agricultural University;

摘要(Abstract):

试验旨在研究不同水平色氨酸对轻型蛋雏鸡生长性能和血清生化指标的影响,确定其育雏前期色氨酸的适宜需要量,为蛋雏鸡的日粮设计提供数据参考。选用健康且体重相近的1日龄大午金凤蛋雏鸡375只,随机分为5组,每组5个重复,每个重复15只。在玉米-豆粕型基础日粮中添加不同水平色氨酸,5个处理日粮色氨酸水平分别为0.156%、0.206%、0.256%、0.356%、0.556%,试验期为19 d。结果表明:不同色氨酸水平对蛋雏鸡平均日增重、平均日采食量无显著影响,0.206%、0.256%和0.356%色氨酸组耗料增重比均低于0.156%色氨酸组(P<0.05);日粮中的色氨酸水平对0~18日龄大午金凤蛋雏鸡血清中的总蛋白、血糖、尿素氮、总胆固醇、甘油三酯的含量无显著影响;随着日粮中色氨酸水平的增加,血清白蛋白和球蛋白含量与色氨酸水平呈二次曲线变化(P<0.05)。结合生产性能和血清生化指标,推荐大午金凤蛋鸡育雏前期(0~18日龄)色氨酸需要量为0.203%,回肠末端标准可利用色氨酸为0.193%。
This experiment aimed to study the effects of dietary tryptophan levels on the growth performance and serum biochemical indexes of light-body-weight layer chicks,determine the tryptophan requirement during the early brooding period.A total of 375 one-day-old Dawu Jinfeng layer chicks were randomly divided into 5 groups with 5 replicates,and 15 chicks in each replicate.Different levels of tryptophan were added to the corn-soybean meal basal diet to form 5 treatment diets,and the tryptophan levels reached 0.156%,0.206%,0.256%,0.356%,and 0.556% respectively.The test period was 19 d.Results showed that different levels of tryptophan had no significant effect on the average daily gain and average daily feed intake of laying hens.The feed-to-gain ratio of 0.206%,0.256%,and 0.356% tryptophan groups was significantly lower than that of the 0.156% tryptophan group(P<0.05).The level of dietary tryptophan has no significant effect on the content of the serum total protein,blood sugar,urea nitrogen,total cholesterol,and triglyceride.As dietary tryptophan levels increase,the content of serum albumin and globulin showed a quadratic curve(P<0.05).Based on comprehensive consideration of dietary tryptophan levels on the growth performance and serum biochemical indexes,it was recommended that the tryptophan requirement of Dawu Jinfeng layer during the early brooding period(0-18 days old) was 0.203% expressed as the total tryptophan level or 0.193% expressed as standardized ileal tryptophan level.

关键词(KeyWords): 色氨酸;轻型蛋雏鸡;生产性能;血清生化指标
Tryptophan requirement;Light-body-weight layers;Growth performance;Serum biochemical indexes

Abstract:

Keywords:

基金项目(Foundation): 财政部和农业农村部:国家现代农业产业技术体系(CARS-40)

作者(Authors): 石小童;卿寒睿;高晏;马秋刚;赵丽红;张建云;
SHI Xiaotong;QING Hanrui;GAO Yan;MA Qiugang;ZHAO Lihong;ZHANG Jianyun;State Key Laboratory of Animal Nutrition,College of Animal Science and Technology,China Agricultural University;

DOI: 10.19556/j.0258-7033.20210611-05

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