湖藏杂交母羊泌乳规律及哺乳期羔羊体重生长规律研究  

Study on lactation law of Hu-Tibetan crossbred ewes and weight growth law of lambs during suckling period

作　　者：魏晓燕 严秉莲 张金学 马金宝 屈永峰 李晓燕 WEI Xiao-yan;YAN Bing-lian;ZHANG Jin-xue;MA Jin-bao;QU Yong-feng;LI Xiao-yan

机构地区：[1]武威市畜牧兽医科学研究院,甘肃武威733000 [2]民勤县畜禽良种繁育研究中心,甘肃武威733000

出　　处：《饲料研究》2023年第20期98-102,共5页Feed Research

基　　金：甘肃省青年科技基金计划“湖羊与藏羊杂交效果研究(项目编号:20JR10RA781)”。

摘　　要：试验旨在研究湖羊与藏羊(湖藏)杂交哺乳母羊的泌乳规律和哺乳期羔羊的生长发育规律。试验以12只湖藏杂交哺乳母羊及其所产的12只羔羊为研究对象,研究母羊产后61 d泌乳规律、乳成分变化规律及哺乳期羔羊体重变化规律。结果显示,湖藏杂交母羊泌乳曲线总体呈泌乳前期泌乳量快速上升、到达峰值后缓慢波动下降的趋势,符合Wood模型,泌乳曲线可用方程Y=0.463t^(0.505)e^(-0.028t)(R^(2)=0.900)描述。母羊乳中乳脂、乳蛋白、非脂乳固体含量均随着泌乳天数的增加而明显降低,乳糖含量差异不显著。母羊产后第1、7、28 d泌乳量与乳房宽显著相关(P<0.05)。湖藏杂交哺乳羔羊平均出生重为(3.811±0.530)kg,羔羊61日龄体重为(16.966±1.645)kg,平均日增重为(0.219±0.028)kg/(头·d)。1~61日龄羔羊体重随着日龄增加近似于直线变化,可通过回归公式:Y=0.216X+3.058(R2=1.000)进行估计。研究表明,试验可为研究湖藏杂交母羊泌乳特性和羔羊早期断奶补饲粮提供参考。The experiment was to study the lactation regularity of Hu-Tibetan sheep crossbred lactation ewe and the growth and development regularity of lambs during suckling period.Twelve Hu-Tibetan crossbred lactating ewes and their 12 lambs were used as research objects to study the regularity of lactating ewes at 61 d after delivery,the change regularity of milk composition and the change regularity of body weight of lactating lambs.The results showed that the lactation curve of Hu-Tibetan crossbred ewes showed a trend of rapid increase in lactation in early lactation period and slow fluctuation decline after reaching the peak,which was consistent with Wood model.The lactation curve could be described by the equation Y=0.463t^(0.505)e^(-0.028)t(R^(2)=0.900).The content of milk fat,milk protein and non-fat milk solids decreased significantly with the increase of lactation days,while the lactose content had no significant difference.There was a significant correlation between milk yield and breast width at postpartum 1,7 and 28 d(P<0.05).The average birth weight and the average daily gain of the lambs at 61 d were(16.966±1.645)kg and(0.219±0.028)kg/(head·d)respectively.The body weight of lambs at 1 to 61 d approximately changed linearly with the increase of age,which could be estimated by regression formula:Y=0.216X+3.058(R2=1.000).The study indicates that the study can provide a reference for study of lactation characteristics of Hu-Tibetan cross ewes and early weaning supplement for lambs.

关 键 词：湖藏杂交羊 泌乳曲线 乳成分 生长发育 

分 类 号：S826[农业科学—畜牧学]