褪黑素对肉牛同期发情和情期受胎率的影响
杨超群, 贾鸿儒, 谭建兵, 尹思琦, 吴斯林, 昝林森, 杨武才
褪黑素对肉牛同期发情和情期受胎率的影响
Effects of Melatonin on Estrus Synchronization and Conception Rate in Beef Cattle
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