黄文琴;庄一民;高帆;赵玉宾;崔凯;王世琴;刁其玉;张乃锋;

• 1:中国农业科学院饲料研究所农业农村部饲料生物技术重点开放实验室
• 2:塔里木大学动物科学技术学院

摘要(Abstract)：

本试验旨在研究早期断奶并补饲代乳粉对羔羊生长性能、消化性能、血清生化指标及肉品质的持续影响。选取60只体重[(8.26±2.14) kg]、日龄[(20±1)日龄]相近的健康湖羊公羔,随机分成随母哺乳组(ER组)和早期断奶组(EW组),每组6个重复,每个重复5只羔羊。ER组羔羊饲喂母乳+开食料,至60日龄断母乳;EW组羔羊饲喂代乳粉+开食料,至开食料采食量达到300 g/d时停止饲喂代乳粉。所有羔羊从20日龄开始补饲开食料至65日龄,之后过渡至育肥颗粒料。羔羊65日龄前每隔10 d称重,65日龄后每隔30 d称重;在羔羊65、120、180日龄晨饲前颈静脉采血测定血清生化指标;在55～65日龄、115～125日龄、170～180日龄阶段,每个重复选取1只(共12只)羊进行消化代谢试验;在180日龄,每个重复选取1只(共12只)羊屠宰测定肉品质。结果显示:1) EW组羔羊46～55日龄阶段平均日增重显著低于ER组(P<0.05),91～120日龄阶段平均日增重显著高于ER组(P<0.05)。2) EW组羔羊55～60日龄、115～125日龄、170～180日龄阶段各营养物质消化率相较ER组均未出现显著差异(P>0.05)。3)EW组羔羊65、120日龄时血清尿素氮、生长激素含量显著高于ER组(P<0.05),EW组羔羊180日龄时血清β-羟丁酸含量显著低于ER组(P<0.05)。4)早期断奶并补饲代乳粉对羔羊180日龄宰前活重、屠宰率及肉品质指标均无显著影响(P>0.05)。综上所述,早期断奶并补饲代乳粉降低了羔羊哺乳阶段(25～65日龄)的生长性能,但提高了育肥前期(66～120日龄)羔羊的生长性能,对育肥后期(121～180日龄)羔羊的生长性能、消化性能及肉品质均没有显著影响。

关键词(KeyWords)： 早期断奶;补饲代乳粉;羔羊;生长性能;消化性能;血清生化指标;肉品质

Abstract:

Keywords:

基金项目(Foundation): 国家重点研发计划课题（2017YFD0502001）;; 中国农业科学院基本科研业务费专项（Y2019CG08)

作者(Author): 黄文琴;庄一民;高帆;赵玉宾;崔凯;王世琴;刁其玉;张乃锋;

Email:

DOI:

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