摘要
[目的]为了探索不同剂量过瘤胃氯化胆碱对围产期奶牛产奶量、奶品质和血液生化指标的影响,以及作用机制.[方法]采用40 头荷斯坦牛为试验对象,随机分为对照组、试验A组、试验B组和试验C组,其中对照组饲喂正常日粮,试验A组、B组和C组分别在日粮基础上添加10 g/头·d,20 g/头·d和30 g/头·d的过瘤胃氯化胆碱,检测其产奶量、奶品质、血糖、总胆固醇、甘油三酯和β-羟基丁酸变化.[结果]过瘤胃氯化胆碱能有效提高产奶量,增加奶中乳脂肪和乳糖含量,促进血糖恢复,降低总胆固醇和β-羟基丁酸,改善奶牛生产性能.[结论]日粮添加20 g/头·d过瘤胃氯化胆碱,改善奶牛生产性能、血液生化指标.
Abstract
[Objective]In order to explore the effects of different doses of per rumen choline chloride on milk yield,milk quality and blood biochemical indexes of periparturient cows,as well as the mechanism of action.[Method]Forty Holstein cows were randomly divided into control group,test group A,test group B and test group C.The control group was fed with normal diet,and test groups A,B and C were supplemented with 10 g/head-d,20 g/head-d and 30 g/head-d of per rumen choline chloride on top of their diets,and milk yield,milk quality,blood glucose,total cholesterol,triglyceride and β-hydroxybutyric acid changes were detected.β-hydroxybutyric changes.[Result]Choline per rumen chloride was effective in increasing milk yield,milk fat and lactose content,promoting blood glucose recovery,lowering total cholesterol and β-hydroxybutyric acid,and improving the production performance of dairy cows.[Conclusion]The addition of 20 g/head-d per-rumen choline chloride to the diet improved the performance and blood biochemical indexes of dairy cows.
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