中文摘要：

巴美肉羊是内蒙古自治区最新培育成的肉羊新品种,具有很高的研究价值。选择4、6、8月龄巴美肉羊各10只,与同月龄的小尾寒羊、苏尼特羊作对比屠宰实验,分别测定并计算其屠宰性能（主要包括屠宰率和净肉率）和胴体质量（主要包括眼肌面积和背肉厚）,确定巴美肉羊在屠宰性能和胴体质量方面是否具有优越性。结果表明：巴美肉羊从4～8月龄,其眼肌面积显著大于小尾寒羊和苏尼特羊的眼肌面积（P〈0.05）;其6月龄和8月龄的屠宰率、净肉率以及背肉厚都显著大于小尾寒羊和苏尼特羊的该项指标（P〈0.05）。同时,4月龄巴美肉羊的屠宰率、净肉率、眼肌面积和背肉厚都极显著小于该品种肉羊6月龄的同类指标（P〈0.01）;而6月龄的屠宰率和净肉率显著小于该品种肉羊8月龄的同类指标（P〈0.05）。因此,通过分析,初步确定巴美肉羊的最佳屠宰月龄为6～8月龄这一阶段。

英文摘要：

Bamei lamb is a locally newly developed breed for meat production in Inner Mongolia,but it slaughter performance and carcass characteristics have never been defined yet.In this study,Bamei lamb at 4,6,8 months of age were slaughtered and its slaughter performance and carcass quality were compared with those of Small tailed sheep and Sunit lamb of the same age.The results showed that Bamei lamb at all ages analyzed had bigger loin eye area than the other two breeds of the same ages（P 0.05）.Dressing percentage,lean meat yield and back meat thickness of Bamei lamb at 6 months and 8 months of age were significantly higher than those of Small tailed sheep and Sunit lamb of the same age（P 0.05）.Dressing percentage,lean meat yield,loin eye area and back meat thickness of Bamei lamb at 4 months of age were significantly lower or smaller than those at 6 months of age（P 0.01）,but which were smaller or lower than those at 8 months of age（P 0.05）.In summary,Bamei lamb is superior to Small tailed sheep and Sunit lamb for meat production.Based on the data we obtained,the proper slaughter age for Bamei lamb is between 6 months and 8 months.