The available embryo percentage of yellow cattle was greater than dairy and beef cows (P< 0.01), the superovulation result in fall and winter time was better than in spring (P< 0.01).
黄牛胚胎可用率高于奶牛、肉牛（P＜0．01），育成牛胚胎可用用率高于经产牛（P＜0．01），秋冬季超排效果明显好于春季（P＜0．01）。
The available embryo percentage of yellow cattle was greater than dairy and beef cows (P< 0.01), the superovulation result in fall and winter time was better than in spring (P< 0.01).
黄牛胚胎可用率高于奶牛、肉牛（P＜0．01），育成牛胚胎可用用率高于经产牛（P＜0．01），秋冬季超排效果明显好于春季（P＜0．01）。
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