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

畜牧人

標題: 追求大蛋的嚴重后果 [打印本頁]
作者: jeremy    時間: 2008-1-28 09:48
標題: 追求大蛋的嚴重后果
現在好多養殖戶和消費者追求雞蛋的蛋形要大，蛋重要重。這對蛋雞養殖業很不利，造成蛋雞超負荷生產、難產、脫肛等問題，蛋雞的利用率降低，效益降低！



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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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