日粮中添加发酵啤酒糟对乳牛生长性能、乳品质和血清生化指标的影响.

In order to explore the effects of adding fermented brewer's grains on growth performance, milk quality and serum biochemical indexes of dairy cows, a total of 60 dairy cows with similar body condition were randomly divided into four groups, namely the control group, test Ⅰ group, test Ⅱ group and test Ⅲ group, respectively, 0, 5%, 10% and 15% fermented brewer's grains were added to the basal diet, with a pre-test period of 7 days and a formal period of 60 days. The results showed that compared with the control group, the final body weight and average daily gain of the test cattle in the Ⅰ, Ⅱ and Ⅲ groups were significantly increased (P<0.05), the feed weight ratio was significantly decreased (P<0.05), and the average feed intake of the test cattle in the Ⅱ and Ⅲ groups was significantly increased (P<0.05). The milk yields of the Ⅱ and Ⅲ groups were significantly increased (P< 0.05), the milk fat rate and milk protein rate in the milk of the Ⅱ and Ⅲ groups were significantly increased (P<0.05), and the number of somatic cells was significantly decreased (P<0.05), and the total protein content in the serum of the cows in the Ⅰ, Ⅱ and Ⅲ groups was significantly increased (P<0.05), and the albumin content and urea nitrogen in the serum of the Ⅱ and Ⅲ groups were significantly increased (P<0.05), and the urea nitrogen content was significantly decreased (P<0.05). In conclusion, adding fermented brewer's grains to the diet could improve the production performance, milk quality and serum biochemical indexes of dairy cows, and the optimum dosage of fermented brewer's grains was 15% under this experimental condition. [ABSTRACT FROM AUTHOR]