Abstract: This experiment was conducted to investigate the effects of composite enzyme preparation FE907 on milk production and disease resistance of lactating dairy cows. A total of 28 lactating Holstein dairy cows were randomly allocated into two groups with 14 ones per group, which were fed a total mixed ration (TMR) alone and supplemented with 20 g/d·cow of FE907, respectively. The feeding experiment lasted four weeks. The results showed that the daily milk production was increased by 1.6 kg/d (P > 0.05) in response to dietary supplementation of FE907. In addition, an increase of 0.08% in the fat content of milk and of 0.09 kg/d in the production of milk was observed over the control group with significant differences (P < 0.05). The protein content of milk and the production of milk protein were also increased by 0.06% and 0.07 kg/d, respectively. The benefit per day from one cow was 6.28 RMB more than the control group. It is concluded that supplementing 20 g/d·cow of the enzyme preparation to the diet has a positive effect on improving the milk yield, milk composition and economic benefit while reducing the risk of developing mastitis.

Key words: enzyme preparation FE907; milk yield; milk composition; economic benefit; treatment number; dairy cows

摘要： 目的:研究酶制剂对泌乳奶牛生产性能和疾病的影响.方法:选取28头泌乳荷斯坦奶牛,随机分为2组,每组14头.2组奶牛在全混合日粮上分别添加0、20 g/(头·d)复合酶制剂FE907,实验期4周.结果:实验组奶牛日均产乳量提高了1.6 kg/d(P＞0.05);实验组乳脂率比对照组提高0.08％,乳脂量提高0.09 kg/d,差异显著(P＜0.05),乳蛋白率提高0.06％,乳蛋白量提高0.07 kg/d,经济效益每天每头奶牛比对照组多盈利6.28元.结论:奶牛日粮中添加20 g/(头·d)的奶牛复合酶制剂FE907,可以提高产乳量,改善乳成分,提高经济效益,同时,可以在一定程度上降低患乳房炎的风险.

关键词: 复合酶制剂FE907；产乳量；乳成分；经济效益；治疗次数；奶牛