正阳三黄鸡产蛋初期蛋重、蛋形指数变化规律研究
盛东峰,李淑梅
正阳三黄鸡产蛋初期蛋重、蛋形指数变化规律研究
Study on Changing Law of Egg Weight and Egg Shape Index in Early Laying Period of Zhengyang Threeyellow Broilers
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