杜仲素对奶牛生产性能和免疫机能的影响

本试验旨在研究日粮中添加杜仲素对奶牛生产性能及血液免疫指标、抗氧化指标的影响。选择40头胎次和产奶量相近的中国荷斯坦牛并随机分为两组进行试验,试验组奶牛在对照组日粮基础上每日灌服20g杜仲素,研究其对奶牛生产性能的影响,试验期为75d。另外,选择8头患有乳房炎的奶牛,每日灌服50g杜仲素,观察其对奶牛血液免疫指标和抗氧化指标的影响,试验期为30d。结果表明,1)杜仲素的添加对奶牛采食量无明显影响,能明显提高受胎率,预防乳房炎的发生;2)杜仲素显著降低了牛奶体细胞数(P<0.05);3)杜仲素对产奶量基本没有影响,对乳脂率有提高作用,但显著降低了乳蛋白率(P<0.05);4)杜仲素显著降低了奶牛血液中丙二醛(MDA)水平,有提高血液中IgG含量的趋势,对血液中谷胱甘肽过氧化物酶(GSH-PX)、超氧化物歧化酶(SOD)、过氧化氢酶(CAT)、IgM、IgA没有显著影响。由此可见,日粮中添加杜仲素能在一定程度上提高机体的免疫力和抗氧化能力,预防乳房炎的发生,提高繁殖性能。

Influence of Eucommin on Production Performance and Immunity Function in Dairy Cows

This study was conducted to evaluate the influence of adding eucommin on production performance and immunity function of dairy cows. A total of 40 Chinese Holstein cows were selected based on the same parity, duration of lactation and milk yield, and assigned into two groups randomly. The experimental group was fed with 20g/d eucommin for 75 days, and the control group without eucommin. In addition, another 8 Chinese Holstein with mastitis were fed with 50g/d eucommin for 30 days. The results showed that： 1） There was no influence on milk yield, the fat content had the tendency of increasing in the experimental group, but the lactoprotein reduced significantly （P〈0.05）. 2） There was significant influence on somatic count （SCC）, and SCC was lower in experimental group than control group. 3） Eucommin had the tendency of increasing the content of ｜gG, and decreased the MDA content in serum significantly（P〈0.05）. There was no influence on the level of SOD, CAT, IgM and IgA. It was concluded that adding eucommin had influence on production performance of dairy cows and had a significant role in the prevention of mastitis, it can improve body immunity and antioxidant capacity to some extent.