南方集约化饲养条件下荷斯坦奶牛乳脂率和乳蛋白率变化规律的初步研究
남방집약화사양조건하하사탄내우유지솔화유단백솔변화규률적초보연구
Study on the Variability of Fat Percentage,Milk Protein Percentage of Holstein under Immense Feeding System in Southern Area of China
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