中草药添加剂对围产期奶牛血液生化指标及生产性能的影响

本研究旨在研究中草药添加剂对围产期奶牛血液生化指标及生产性能的影响。试验选择36头体况、预产期和胎次相近的荷斯坦奶牛，采用完全随机试验设计，分为3组，每组12头奶牛。3组奶牛在基础日粮中分别添加0、150和300 g/d的中草药添加剂，预饲期1周，正饲期6周。奶牛产后每周采集1次饲料样、血样和奶样，测定其干物质采食量、血液生化指标及乳成分等指标。结果表明，随着中草药添加剂饲喂量的增加，围产期奶牛产后产奶量表现出一定的升高趋势，产奶量分别增加5.1%和10.6%，但与对照组相比差异不显著（P>0.05），围产期奶牛饲喂中草药添加剂对干物质采食量没有显著影响（P>0.05）。与对照组相比，随着中草药添加剂饲喂量的增加，乳中体细胞数显著降低（P<0.05），分别下降62.7%和76.6%，但对乳中其他常规指标没有显著的影响（P>0.05）。与对照组相比，随着中草药添加剂饲喂量的增加，奶牛血清中非酯化脂肪酸（NEFA）含量显著降低（P<0.05），降低水平分别为29.0%和35.1%，血清中其他常规指标没有显著变化（P>0.05）。综上所述，在本试验条件下，推荐围产期奶牛中草药添加剂添加量为300 g/d，可以显著降低乳中体细胞数和血中NEFA含量，改善奶牛健康状况，提高奶牛产后生产性能。

Effect of Chinese Herb Additive on Blood Biochemical Indices and Production Performance in Transition Dairy Cows

The objective of the experiment was to investigate the effect of Chinese herb additive on production performance and blood biochemical indices in transition dairy cows.Thirty six Holstein dairy cows were randomly assigned to three treatments,supplemented with 0,150 and 300 g/d Chinese herb additive,respectively.Experimental duration was 7 weeks and the first week was the preliminary period.After delivery,feed,blood and milk samples were collected once a week for the measurement of dry matter intake,blood biochemical indexes and milk components.The results showed that cows fed 150 and 300 g/d Chinese herb additive tended to increase milk production (5.1% and 10.6% respectively) compared to control group,but the difference was not significant (P<0.05).Meanwhile,the somatic cell count in milk significantly decreased (P<0.05),which decreased by 62.7% and 76.6%,respectively.Feeding Chinese herb additive had no significant effect on dry matter intake and other milk composition (P>0.05).Compared to control group,cows received Chinese herb additive significantly decreased the content of serum NEFA (P<0.05),which decreased by 29.0% and 35.1%,respectively.There was no significant difference on other indexes in serum (P>0.05).The results showed that dietary supplementation with 300 g/d Chinese herb additive had a good effect for transition dairy cows,which could significantly reduce the somatic cell count in milk and the content of NEFA in blood,and would improve the health status of dairy cows,and the postpartum production performance of dairy cows.