日粮粗精比对奶牛瘤胃液和血清乙酸、丙酸、丁酸的影响
일량조정비대내우류위액화혈청을산、병산、정산적영향
Effects of forage to concentrate ration on rumen fluids and acetate,propionate and butyrate in serum of lactating dairy cows
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