复合酵母培养物对奶牛生产性能的影响

通过在日粮中添加复合酵母培养物,研究其对荷斯坦牛生产性能的影响。结果表明,添加复合酵母培养物的试验组奶牛产奶量显著高于对照组(P<0.05),乳脂率也略有提高,但乳蛋白率和乳糖率与对照组相比差异不显著。

Effects of Composite Yeast Culture on Milk Production and Milk Quality in Dairy Cows

In order to research the effects of composite yeast culture on milk production and milk quality in dairy, 20 of Holstein cow, with similar parity, lactation days, milk products, body condition were divided to the trail group and the control group, the trail group was fed with diet in basal diet with adding composite yeast culture 250g every day. The feeding trial lasted for 30 days with 15 pre- feeding days and 30 trial days. Milk yield and milk quality of the control and trail group were determined. Experimental results showed that milk production of the control group and the trail group were 16.14±0.42 and 17.85±0.45kg/d respectively, and butter-fat percentage was 3.73±0.19 and 3.79±0.21% respectively, and milk protein was 3.06±0.08 and 3.06±0.06% respectively ,and lactose was 4.77±0.12and 4.78±0.09% respectively. The milk production of adding composite yeast culture was 1.71kg higher than the control group, and the experimental group was obviously higher than the control group （P 〈 0.05）. Meanwhile butter-fat percentage also had higher trends than the control group, milk protein and lactose of the experimental group had little influence on than the control group.