选择健康、泌乳月龄、年龄、胎次、产奶量相对接近的荷斯坦奶牛18头,随机分为2组。在饲料配方、饲养管理及其他环境条件完全相同的情况下,试验组添加了瘤胃微生态制剂,对照组不添加,进行为期37d的饲养试验。称重并记录预试期和试验期每头牛的日产奶量。结果试验组试验后比对照组平均日产奶量提高了1.97kg;试验组试验后比试验前平均日产奶量提高了1.93kg;转换成经济效益每天可增收3.05元。由此说明,瘤胃微生态制剂能提高泌乳奶牛的产奶量,增加经济效益。

Eighteen delivered black-and-white dairy cows with similar fetuses,years and milk yielding were randomly divided into two equal groups under same feed formula,management and environmental conditions with direct-fed microbial(DFM)(as treatment) or without DFM (as CK)。Milk production were determined each day during experimental period。The average milk production were increased by 1.97㎏;respectively,in DFM-adding group than in CK during the same period。The average milk production were increased by 1.93㎏;respectively,in experiment stage than in pre-experiment stage within the same group(DFM-adding group)。The results indicated that feeding dairy cows with micro-ecological agent increased milk production and specific gravity。