日粮中添加硒和维生素E对奶牛产奶性能及牛乳和血浆中硒和维生素E含量的影响

Effects of supplementation of selenium and vitamin E on milk production and their contents in milk and plasma in dairy cattle

选择32头泌乳中期、胎次一致、泌乳量相近的中国荷斯坦奶牛,随机分为4组,分别为对照组(饲喂基础日粮)、添加有机硒组、添加维生素E组和添加有机硒+维生素E组,试验期60 d。结果显示:(1)日粮中单独添加硒和维生素E及同时添加硒和维生素E对奶牛的产奶量、乳蛋白、乳脂、乳糖和总固形物含量均无显著影响(P>0.05);(2)日粮中添加硒显著提高了牛乳和血浆中硒的含量(P<0.001);(3)日粮中添加维生素E显著提高了牛乳和血浆中维生素E的含量(P<0.001);(4)同时添加硒和维生素E对于牛乳和血浆中硒和维生素E含量未出现增效作用。因此,在奶牛日粮中添加硒和维生素E是生产富硒奶和高维生素E奶的一种有效方法。

This study was conducted to investigate the effect of supplementation of Se and vitamin E in diet on milk production and the contents of Se and vitamin E in milk and plasma in dairy cattles.Thirty-two Chinese Holstein cows in mid lactation with same parity and similar milk yield were randomly assigned to 4 groups：control group（fed basal diet）,basal diet ＋ organic Se group,basal diet ＋ vitamin E group,basal diet ＋ organic Se ＋ vitamin E group.The duration of the trial was 60 d.The result showed：（1）supplementation of Se and vitamin E had no significant effects on milk yield and concentrations of protein,fat,lactose and total solid in milk（P 0.05）;（2）the content of Se in milk and plasma increased due to supplementation of Se（P 0.001）;（3）the contents of vitamin E in milk and plasma increased as a result of dietary addition of vitamin E（P 0.001）;（4）the interaction of Se and vitamin E in increasing their respective content in both plasma and milk was not found in the study.In conclusion,supplementation of Se and vitamin E is an effective ways to produce high Se and vitamin E milk.