舍饲绵羊产后30天产奶量及乳成分变化规律  

Changes of milk yields and their nutrient composition in confined 0-30days postpartum sheep

作　　者：马友记[1] 董琪利[1] 李发弟[1] 李慧[1] 李冲[1] 王维民[1] 姜仲文 

机构地区：[1]甘肃农业大学动物科学技术学院,甘肃兰州730070 [2]甘肃省永昌肉用种羊场,甘肃金昌737200

出　　处：《草业学报》2013年第5期287-293,共7页Acta Prataculturae Sinica

基　　金：国家十二五科技支撑计划项目(2011BAD28B05);国家肉羊产业技术体系(CARS-39)资助

摘　　要：选取舍饲甘肃肉用绵羊新品种核心群母羊14只,对其产后1~30d产奶量及乳成分指标的变化规律进行了研究。结果表明,舍饲甘肃肉用绵羊新品种核心群母羊产后30d内具有较高的泌乳性能,30d总泌乳量为(32.82±0.19)kg,日均泌乳量为(1.09±0.08)kg,1~30d泌乳曲线方程为Y=530.60t0.368e-0.015t,日增重可达(0.234±0.033)kg。母羊产后30d内各种常规成分及物理性质均以第1天变化最为显著,到第3天趋于平稳;初乳中各种成分的含量均与常乳不同并呈现一定规律性变化,产后1~7d常规成分中可溶性固形物、非脂固形物、蛋白质和脂肪含量呈下降趋势;乳蛋白、非脂固形物、密度和酸度在产后1~21d呈下降趋势,随后呈上升趋势;乳脂、可溶性固形物和酸度在产后30d内一直呈下降趋势;乳糖含量在1~14d呈上升趋势,随后其含量趋于平稳;冰点在1~5d呈上升趋势,随后呈缓慢下降,而乳密度在产后30d内变化不显著(P>0.05)。以上结果为甘肃肉用绵羊新品种群种质特性和早期断奶羔羊的补饲提供了基础数据。Fourteen ewes of Gansu meat sheep new breeding population were selected to study the milk yield and nutrient composition during 30 days postpartum in this paper. The results showed that the ewes of Gansu meat sheep new breed population had higher lactation performance within 30 days postpartum. The 30 days total milk yield was （32.82±0.19） kg, and daily average daily milk yield was （1.09±0.08） kg. The lactation curve equation of 1--30 days was Y=530. 60t0.368e-0.015t, while daily weight gain reached （0. 234±0. 033） kg. The milk conventional components and physical properties had significant changes in the first postnatal day, and tended to be steady until the third day. The milk composition differ between colostrums and normal milk, and had certain regularly changes. The content of milk soluble solids, non fat solids, protein and fat decreased, while lactose showed upward trend from the first day to 7th day. The content of milk protein, non fat solids, density and acidity showed a decreasing trend from the first day to 21th day, then rose in the following days. The content of milk fat, soluble solids and acidity had been on a downward trend, while the lactose had upward trend from the first day to 14th day, then its content tends to be steady. The freezing point showed increasing trend from the first day to 5th day, then decreased slowly. The density had no significant changes within 30 days postpartum （P^0.05）. The above results have provided the basic data for Gansu meat sheep new breed population＇s characteristics and the supplementary feeding of early weaned lambs.

关 键 词：舍饲绵羊 泌乳量 泌乳曲线 乳成分 初乳 常乳 

分 类 号：S826.94[农业科学—畜牧学]