微生态制剂对高产奶牛产奶量和乳成分的影响

Effects of Microecological Preparations on the Milk Yield and Composition in High Yield Dairy Cow

根据年龄、泌乳时间和产奶量选择20头高产荷斯坦牛(产奶量在30kg以上),随机分为2组,试验采用配对交叉设计,探索高产奶牛日粮中添加微生态制剂对其产奶量和乳成分的影响。结果发现,添加微生态制剂能够提高奶牛产奶量,显著降低奶料比,提高乳脂率和乳蛋白,降低乳尿素氮,提高奶牛养殖效益。

Totally 20 cows according the same age and lactation period as well as milk yield（milk yield exceed 30kg/d） were randomly selected and divided into two treatments. In an open randomized cross-over test, the effects of microecological preparation on milk yield and composition in high yield dairy cow were studied. The result found that supplementing microecological preparation could improve milk yield and decrease the rate of milk and feed. The rate of milk fat and protein were improved and milk urea nitrogen was decreased. But it was not significant different. The benefit was improved if supplementing microecological preparation in ration of high yield dairy cow. The result showed that supplementing microecological preparation could improve milk yield and milk composition.