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Year:
Volume:
Issue:
xi you yu fang tai yi zhi liu zuo yong
Pages:
39
Year:
1986
Issue:
12
Journal:
Heilongjiang Animal Science and Veterinary Medicine
Keyword:
胎衣滞留
;
作用
;
血硒水平
;
遗传因子
;
维生素
;
预防
;
畜群
;
乳牛
;
机械
;
母牛
;
Abstract:
<正> 最新材料记载,如果成年乳牛的胎衣滞留不是机械的或遗传因子引起的,则可能系因硒和(或)维生素E缺乏所致。在有胎衣滞留问题畜群中的母牛血硒水平比没有此问题的畜群要低。在产前20天注
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