哈密市郊区奶牛繁殖性能随季节变化的研究

The study on reproductive performance of cow of Hami surbur vary with seasons

哈密郊区饲草质劣、单一 ,造成奶牛在季节上维生素代谢的不平衡 ,繁殖性能明显随季节而变化 。

The fodder fed to the cow of Hami subur is simple and of bad quality.the cow lose theirs balance of vitamin metabolism sasonaly. the reproductive performace of cow vary with seasons obviously. On the basis of years practice and lots of data. We infer reasoning from analogy.