饲粮代谢能和粗蛋白质水平对21~34周龄海兰灰蛋鸡生产性能与蛋品质的影响
사량대사능화조단백질수평대21~34주령해란회단계생산성능여단품질적영향
Effects of Dietary Metabolizable Energy and Crude Protein Levels on Performance and Egg Quality of Hy-Line Laying Hens Aged 21 to 34 Weeks
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