产前营养水平对奶牛产后干物质摄入量、产乳量及血浆神经肽(NPY)影响的研究
산전영양수평대내우산후간물질섭입량、산유량급혈장신경태(NPY)영향적연구
The Effect of Different Energy Level on the DMI, Milk Production and Plasma NPY of Dairy Cows After Parturition
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