复合酶对奶牛产奶量和乳成分的影响

本试验旨在研究复合酶对奶牛产奶量和乳成分的影响。选择胎次、泌乳天数、产奶量相近的健康荷斯坦泌乳牛30头，随机分为2组，即试验组和对照组，试验组每日在TMR中添加复合酶制剂50g。结果显示，试验组奶牛日均产奶量对比照组提高了6．6％，差异显著（P〈0．05）；试验组乳蛋白率比对照组提高0．19％，差异显著（P〈0．05），乳脂率比对照组提高0．3％，差异显著（P〈0．05），乳糖含量比对照组提高0．2％；经济效益每天每头奶牛比对照组多盈利3．88K。说明每日在奶牛TMR中添加50g复合酶，可提高奶牛产奶量，改善牛奶品质，增加经济效益。

Effects of Compound Enzyme on the Milk Production and Composition of Dairy Cows

The purpose of this experiment was to study the effects of compound enzyme on cow＇s milk production and milk composition.Thirty Holstein lactating dairy cows with similar parity, lactating days and milk production were divided into two groups, the experimental group and the control group.The cows in the experimental group were fed TMR supplemented with 50g compound enzyme per day. The daily milk production of experimental group （30.95kg） was increased by 6.6% than that of the control group （29.03kg） （P〈0.05）. The milk protein, milk fat and milk lactose contents were increased by 0.19%, 0.3% and 0.2%, respectively. Benefit from one cow in the experiment group per day was 3.88 yuan more than the control group. Adding 50 grams compound enzyme into the TMR per day could improve milk production, milk quality and economic benefits.