奶牛性别控制技术的应用探讨
Heilongjiang Journal of Animal Reproduction（2007）
Abstract
<正>在自然条件下,奶牛产雌雄后代比例接近l:1,而饲养奶牛主要的目的是产奶,所以每一位饲养者都希望母牛多产雌性牛犊,以增加经济效益。
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