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grazing livestock improved seed rate
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grazing livestock improved seed rate
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放牧家畜良种率
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grazing livestock improved seed rate
放牧家畜良种率
在放牧家畜群中良种家畜数量占其家畜总数的百分比。良种家畜是指有一种或多种遗传稳定且对人类有益的性状(如生产性能、饲料效率、抗病力、抗应激能力等)的家畜品种。
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