高产奶牛日粮中添加复合型添加剂 对其产奶量和乳成分的影响.

In order to analyze the effects of compound additives on the milk production performance of high-yield dairy cows, a single-factor completely randomized experiment design was used in this experiment. A total of 100 Holstein lactating cows with parity of 1 parity, milk yield of (34.5±2.5) kg/d and lactation days of (75±5) d were randomly divided into a control group and an experimental group, with 50 cows in each group. In the experimental group, 100 g/(head·d) compound additive was added to the basic diet. During the 60 days of the experiment, the milk yield and milk composition were analyzed at 1st, 15th, 30th, 45th and 60th days. The results showed as follows: it was found that compared with the control group, the milk yield, milk fat percentage, lactose percentage, total solids and protein percentage of the experimental group were significantly increased (P<0.05). The milk somatic cell count of the experimental group was significantly lower than that of the control group (P<0.05). The results indicated that the addition of compound additives had a better effect on the lactation performance of high-yield lactating cattle, effectively improved the milk quality, improved the economic benefit. [ABSTRACT FROM AUTHOR]