
25-羟基维生素D3替代维生素D3对产蛋后期蛋鸡生产性能、蛋品质和钙磷代谢的影响
Effects of Substituting 25-Hydroxyvitamin D3 for Vitamin D3 on Performance, Egg Quality and Calcium and Phosphorus Metabolism of Laying Hens in Late Laying Period
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