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畜牧人

標(biāo)題: 奶牛精料補(bǔ)充料中灰分含量一般不能超過(guò)多少？ [打印本頁(yè)]
作者: zsy315315    時(shí)間: 2015-10-19 15:13
標(biāo)題: 奶牛精料補(bǔ)充料中灰分含量一般不能超過(guò)多少？
請(qǐng)教，奶牛精料補(bǔ)充料中灰分的含量一般不能超過(guò)多少？企業(yè)制定標(biāo)準(zhǔn)時(shí)可否低于國(guó)家的行業(yè)標(biāo)準(zhǔn)？



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