河南奶山羊及其杂种羊泌乳早期乳成分动态变化

对河南奶山羊及其杂种羊泌乳早期初乳及常乳主要常规成分进行分析。结果表明:奶山羊和杂种羊乳中干物质含量分别在泌乳的第1天和第2天最高,分别达24.14g/100g和26.17g/100g,高峰后随着泌乳期的延长总体上呈下降趋势;乳糖含量在两组羊乳中随着泌乳期的延长总体上均呈上升趋势;乳脂率均在泌乳第5天和第4天时最高,分别达6.32g/100g和5.38g/100g,随着泌乳期的延长呈下降趋势。奶山羊前5d含量所泌初乳中,乳蛋白含量逐渐升高,常乳中乳蛋白含量基本稳定,杂种羊乳蛋白含量在初乳期随着泌乳期的延长呈下降趋势,常乳中含量基本稳定。乳中的灰分含量随着泌乳期的延长总体呈下降趋势,到常乳期有波动。乳中钙含量在实验期趋于稳定,磷含量在初乳期随泌乳期延长而稍有增加,常乳期平稳下降。河南奶山羊及其杂种羊乳中主要成分随着泌乳时间的变化而变化,各主要成分含量的变化与饲养管理条件和羊只营养状况等因素存在密切关系。

Dynamic Changes of Main Milk Components during Early Lactation of Henan Dairy Goat and Its Hybrid

This study was conducted to test main nutritional components of milk from Henan dairy goat(DG) and its hybrid goat(HG) during early lactation.Results showed that dry substance content reached the maximum,24.14 g/100 g and 26.17 g/100 g at 1 and 2 days post-lactation in DG and HG,respectively,and then decreased with prolonged lactation time;likewise,fat content reached the climax,6.32 g/100 g and 5.38 g/100 g at 5 days and 4 days post-lactation,respectively,and then exhibited a descending trend.For both DG a...