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全混合日粮中添加高活性干酵母对奶牛生产性能的影响
Effect of High-activity Dry Yeast Supplementation on Performance in Lactating Dairy Cows
【摘要】 试验将96头荷斯坦牛,按年龄、胎次、泌乳天数、日产奶量相近的原则随机配对分成2组。试验组奶牛每头添加1g/d高活性干酵母,饲喂30d。结果表明:高活性干酵母对奶牛产奶量有所提高,但差异不显著(P>0.05);对乳脂肪率和乳蛋白率无显著影响(P>0.05);对尿素氮存在显著影响(P<0.05);乳中体细胞数有降低的趋势,但差异不显著(P>0.05)。
【Abstract】 Ninty-six dairy cows with similar age, parity, lactation length,daily milk yields were selected,and randomly divided into 2 groups(testing group and control group).Each dairy cow of treatment group was supplied 1 g/d yeast which has the high activity.The results indicated that, milk yield has exaltation, but have insignificant diference (P>0.05).No significant influence was found to the components of milk fat rate and milk albumen rate (P>0.05).Testing group MUN is significant diference (P<0.05) than control group (P<0.05).SCC of milk is increment trend, but have insignificant diference (P>0.05).
【Key words】 high-activity dry yeast; TMR; milk yield; milk composition;
- 【文献出处】 乳业科学与技术 ,Journal of Dairy Science and Technology , 编辑部邮箱 ,2010年04期
- 【分类号】S823.5
- 【被引频次】10
- 【下载频次】238