草食家畜Issue(4)：1-8,8.DOI:10.16863/j.cnki.1003-6377.2026.04.001
不同蛋白水平日粮对妊娠后期新疆南疆湖羊母羊体重、初乳成分、血清生化指标及羔羊生长性能的影响
Effects of Dietary Protein Levels on Body Weight,Colostrum Composition and Serum Biochemical Indices of Southern Xinjiang Hu Sheep Ewes during Late Pregnancy,and on Growth Performance of Their Lambs
摘要
Abstract
[Objective]This experiment was conducted to investigate the effects of dietary crude protein levels on body weight,colostrum composition,serum biochemical indices of Southern Xinjiang Hu sheep ewes during late pregnancy,and on the growth performance of their lambs,so as to screen the optimal dietary crude protein level.[Methods]Thirty-three healthy Hu sheep ewes with similar parity,body weight and good pregnancy status,all carrying twin fetuses,were selected and grouped,and fed from day 90 of late pregnancy until lambing,and lambs were fed the same diet after parturition.The pregnant ewes were randomly divided into three groups:low protein level group(7.76%,LP group),medium protein level group(9.62%,MP group),and high protein level group(11.48%,HP group),with 11 ewes per group.The body weights of ewes were measured on days 90,120,and 140 of pregnancy,and body weights of lambs were recorded at birth,and at 7,60,and 120 days of age.Jugular venous blood samples were collected from ewes on day 120 of pregnancy for serum separation,and the indices of creatinine(CRE),total protein(TP),blood urea nitrogen(BUN),glucose(GLU),and ketone bodies(KB)were determined.Colostrum samples were collected from 5 ewes in each group at 12,24,36,48,60,and 72 hours after parturition to analyze lactose,milk fat,and milk protein contents.[Results]For ewe body weight,the LP group showed a negative weight gain during pregnancy,and the body weight on day 140 of pregnancy was extremely significantly lower than those in the MP and HP groups(P<0.01).For colostrum composition,the contents of lactose,milk fat,and milk protein in the LP group were significantly lower than those in the MP and HP groups(P<0.05),while no significant differences were observed between the MP and HP groups.For serum biochemical indices,the levels of CRE,TP,and BUN in the MP and HP groups were significantly higher than those in the LP group(P<0.05).For birth weight,lambs in the HP group were significantly heavier than those in the LP and MP groups(P<0.05),the lamb body weight at 7 days of age in the HP group was extremely significantly higher than that in the LP group(P<0.01),and significantly higher than that in the MP group(P<0.05),and no significant differences in body weight at 60 and 120 days of age were found among all groups(P>0.05).[Conclusion]For Southern Xinjiang Hu sheep ewes during late pregnancy,a dietary crude protein level of 9.62%(medium protein level,MP group)was recommended as the optimal choice,which not only maintained maternal body condition,promoted fetal growth,and improved colostrum quality,but also reduced feeding costs.关键词
湖羊母羊/妊娠后期/日粮蛋白水平/母体效应/羔羊生长Key words
Hu sheep/late pregnancy/dietary protein level/maternal effect/lamb growth分类
农业科技引用本文复制引用
李格,何海迎,解峰,帕提古丽·阿布都克依木,胡波,侯成,肖思宇,孟佳豪,杨会国..不同蛋白水平日粮对妊娠后期新疆南疆湖羊母羊体重、初乳成分、血清生化指标及羔羊生长性能的影响[J].草食家畜,2026,(4):1-8,8.基金项目
国家重点研发项目"肉羊、奶山羊产业关键技术研究与应用示范"(2021YFD160070) （2021YFD160070）
新疆维吾尔自治区重大科技专项"新疆农区多胎(多羔)绵羊种质创新工程"(2023A02004) （多羔）
