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畜牧人

標題: 影響種公牛精液活力的因素有哪些？ [打印本頁]
作者: neau9206    時間: 2009-3-23 10:24
標題: 影響種公牛精液活力的因素有哪些？
請教各位：影響種公牛精液活力的因素有哪些？有沒有那位同仁做過現場，請給點指點，謝謝！
作者: 王紹乾    時間: 2009-3-24 13:38
1、種牛的歲數
2、良好的飼養管理
3、牛舍得衛生和保衛措施
等等等等等等



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亚洲日韩精品无码专区网站_亚洲日本一区二区_亚洲Av无码专区国产乱码DVD_亚洲精品永久在线观看 
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