CAJ | 학술논문

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。
실험선취흑룡강성대경시모집약화내우장년령、태차、체황급비유량상근적건강내우40두,수궤분위4조,매조10두,Ⅰ、Ⅱ、Ⅲ조일량중매두매천첨가5、10화20 g과류위첨채감,Ⅳ조위과류위첨채감대조조。시험기종산전14 d지산후42 d,통과대시험내우산후유단백（LP）、유지솔（BF）、유당（SL）적분석,연구과류위담감화첨채감대내우비유성능화생산성능적영향。결과현시：여대조조상비,Ⅲ조유지솔현저승고（P〈0.05）,각시험조유단백솔、유당화비지고형물불동정도고우대조조,단차이불현저（P〉0.05）;Ⅲ조간물질섭입량명현승고（P〈0.05）,Ⅲ조비유량겁현저승고（P〈0.01）。결론：20 g.두-1첨채감능구유효지제고내우적비유성능화생산성능。
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.