过瘤胃甜菜碱对奶牛泌乳性能和生产性能的影响

Effect of Rumen-Protected Betaine on Milk and Production Performance of Dairy Cows

实验选取黑龙江省大庆市某集约化奶牛场年龄、胎次、体况及泌乳量相近的健康奶牛40头,随机分为4组,每组10头,Ⅰ、Ⅱ、Ⅲ组日粮中每头每天添加5、10和20 g过瘤胃甜菜碱,Ⅳ组为过瘤胃甜菜碱对照组。试验期从产前14 d至产后42 d,通过对试验奶牛产后乳蛋白(LP)、乳脂率(BF)、乳糖(SL)的分析,研究过瘤胃胆碱和甜菜碱对奶牛泌乳性能和生产性能的影响。结果显示:与对照组相比,Ⅲ组乳脂率显著升高(P<0.05),各试验组乳蛋白率、乳糖和非脂固形物不同程度高于对照组,但差异不显著(P>0.05);Ⅲ组干物质摄入量明显升高(P<0.05),Ⅲ组泌乳量极显著升高(P<0.01)。结论:20 g.头-1甜菜碱能够有效地提高奶牛的泌乳性能和生产性能。

In this experiment,forty tested cows that were from an intensive dairy farm were divided randomly into eight groups（in turn I,Ⅱ,Ⅲ,Ⅳ,10 cows per group）,according to different dosage of rumen-protected betaine（5,10,20 and 0 g dosage of betaine,per day for each cow） supplemented into diet from day 14 before calving to day 42 after calving.Meanwhile,effect of rumen-protected betaine on milk yield and production performances.Results showed that compared to control group,milk fat rate significantly increases in groupⅦ（P0.05）;there is a no significant diference in milk protein rate,lactose,and non-fat solidin all test groups（P0.05）.dry matter intake increase markedly in group Ⅶ（P0.05）,and milk yield increased very significantly in Ⅱ group（P0.01）.Conclusion obtained that 20 g rumen-protected betaine per cow may more effectively improve milk performance and reproductive performance of dairy cows.