饲粮粗蛋白质水平对中国荷斯坦奶牛产奶性能、氮利用及血液激素的影响
사량조단백질수평대중국하사탄내우산내성능、담이용급혈액격소적영향
Dietary Crude Protein Levels Affect Milk Production, Nitrogen Utilization and Blood Hormones of Chinese Holstein Dairy Cows
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