甘草草粉替代少量精料对奶牛生产效益的影响

Effect of licorice powder instead of small amount of concentrate on the production efficiency of cows

本试验选择胎次、体重相近、产奶量相近的黑白花奶牛12头,随机分为3组,试验试验Ⅰ组、试验Ⅱ组分别用10%、20%的干草草粉替代日粮中的精料,对照组日粮中不添加。研究奶牛的采食量、产奶量和乳脂率。结果表明,日粮中用部分干草草粉替代精料奶牛平均乳脂率在3.21%~3.30%,与对照组相比差异不显著(P>0.05);产奶量分别提高0.81kg和1.09kg,经济效益提高2.19元,3.44元,效益显著。

This experiment was conducted to investigate the effects of licorice powder instead of small amount of concentra- tion on production of cows. Totally, 12 Holstein cows with similar weight, parity, milk yield were randomly divided into 3 groups,group Ⅰ and group Ⅱ were added 10%, 20 % hay grass powder instead of concentrate diets while no licorice powder in the control group. Feed intake, milk yield and milk fat percentage were evaluated. The results showed that average milk fat percentage is 3.21% -3.30%. Compared with control group,milk production in group Ⅰ and Ⅱ were significantly higher （P 〉 0. 05）, which increased 0.81kg and 1.09kg, respectively. Group I and II were much increased economic benefit, which increased by 2.19 yuan,3.44 yuan,respectively.