复合添加剂对高产奶牛生产性能的影响

Effects of Compound Additive on Performance of High Producing Dairy Cows

试验旨在研究一种复合添加剂对高产奶牛生产性能的影响。根据产奶量、胎次、体重等相近的原则选择40头中国荷斯坦牛,随机分成4个处理组,即对照组、试验Ⅰ组、试验Ⅱ组、试验Ⅲ组,对照组饲喂基础日粮,试验Ⅰ、Ⅱ、Ⅲ组在此基础上,分别按每头牛每天精料量的0.5%、0.8%、1.0%添加复合饲料添加剂。试验期45d,其中预试期10d,正试期35d,测定产奶量、乳成分等指标。结果表明,在高产奶牛日粮中添加复合添加剂对乳成分基本无影响,但可显著提高奶牛产奶量,结合成本考虑,以精料的0.5%添加量效果最好。

A feeding trial was conducted to investigate the effects of a compound additive on the production performance of high producing dairy cows. A total of 40 high producing dairy cows with similar age, weight and calving date were divided into 4 groups randomly（n=10）and were assigned to one of the four diets： basal diet or basal diet supplemented with 0.5%,0.8% or 1.0% compound additive, the feeding trial lasted for 45 days, including 10 days of pre-experiment. Feed intake, milk yields, milk compositions （fat, protein, and lactose and s somatic cell count were measured. The results showed that dietary supplementation of the compound additive had no effect on the milk composition, but it could significantly improve the milk yield of dairy cows. With cost considering, the ratio of 0.5% had better effects.