摘要
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.
出处
《黑龙江八一农垦大学学报》
2011年第5期42-45,共4页
journal of heilongjiang bayi agricultural university
基金
黑龙江省人事厅博士后启动基金(LBH-Q08028)
关键词
过瘤胃甜菜碱
奶牛
乳蛋白
乳脂率
乳糖
干物质
泌乳量
rumen-protected betaine
dairy cattle
loctoprppteion
milk fat rate
lactose
dry matter
milk yield