單項(xiàng)選擇題奶牛的日糧應(yīng)以青粗飼料為主,粗料給量按干物質(zhì)計(jì)算,要達(dá)到奶牛體重的()

A.0.51%~1%
B.1%~1.5%
C.2%~2.5%
D.3%~3.5%


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