目的：探析某羊场所发生的杜泊羊的群发不孕症的病因。方法：本研究分析了不孕杜泊羊群的发病情况、饲养管理情况，并通过血常规检查、血液生化检查、原子吸收光谱法对全血微量元素含量检测。结果：通过饲料结构和饲喂量分析可知，该群羊从预混料中获得的微量元素量已严重超出《牛、绵羊和山羊饲养精要》推荐供给量；通过血常规检测结果可知，该群羊发生了大细胞高血红素性贫血。通过血液生化检查、原子吸收光谱法检测全血微量元素含量结果可知，该群羊出现了高钾、高铁、高锌、高铜、低镁、低钙血症。结论：导致该群羊不发情的主要原因是过量提供了铜、锌、硒、碘、钴、锰、铁。
Aim: To analyze the cause of the group infertility of Dubo sheep in a sheep farm. Methods: This study analyzed the incidence and feeding management of Dubo sheep, and detected the content of trace elements in the whole blood by blood routine examination, blood biochemical examination and atomic absorption spectrometry. Results: Through the feed structure and feeding quantity analyses of microelements we obtained that from the premix alone in this group of sheep had seriously exceeded the recommended supply of Essentials of Cattle, Sheep and Goat Feeding. According to the large cell hyperheme anemia, and higher content of trace elements in the whole blood, we can diagnose that the sheep of group infertility has high potassium, high iron, high zinc, high copper, low magnesium and hypocalcemia. Conclusion: the main cause of non-oestrus in this group of sheep is an excessive supply of copper, zinc, selenium, iodine, cobalt, manganese and iron.