Abstract: In response to the problems of mixed breeds，crude dietary formulation，chaotic immunization protocols，and low standardization in management faced by small and medium?scale sheep farmers in the cold and arid region of Longxi County，and the insufficient adaptation of existing technical standards to the actual needs of these farmers，this study integrated five core technologies——crossbreeding and selection，three?stage precise nutritional regulation， programmed preventive healthcare， shed ? feeding environmental control， and lightweight digital management——to establish a standardized fattening model. Five groups were set up：Group A（Dorper♂ × Small? tailed Han♀ F1，i.e.，Dorper×Small?tailed Han F1），Group B（Dorper♂ × Hu♀ F1），Group C（Suffolk♂ × Small? tailed Han♀ F1），Group D（Suffolk♂ × Hu♀ F1），and Group E（Small?tailed Han purebred as control），with 10 weaned male lambs in each group，for a 90?day fattening trial. The results showed that the Dorper×Small?tailed Han F1 cross achieved an average daily gain（ADG）of 312 g/d，a feed?to?gain ratio（F/G）of 5.18：1，and a net profit of 798 CNY per head，generating an additional income of 163 CNY compared with the control group；the Suffolk×Small? tailed Han F1cross achieved an ADG of 296 g/d，an F/G of 5.45：1，and a net profit of 768 CNY per head，generating an additional income of 133 CNY. The morbidity rates of both crossbred groups were 10% ，lower than the 30% observed in the control group. This model，through the synergy of whole?chain technological integration and lightweight digital management，effectively lowers the operational threshold for standardized farming and provides a reference for the upgrading of the mutton sheep industry for small and medium?scale farmers in similar cold and arid regions of Northwest China.

Key words: Cold and arid region；Small and medium?scale farmers；Sheep fattening；Technological integration；Crossbreeding and selection

摘要： 针对陇西县寒旱区中小养殖户肉羊育肥存在品种混杂、日粮粗放、防疫混乱、管理标 准化低等问题，现有技术标准与中小养殖户实际需求适配不足。该文集成杂交选育、三阶段精 准营养调控、程序化防疫保健、舍饲环境调控及轻量化数字化管理五项技术，构建标准化育肥 模式。试验设5个组别：A组为杜泊羊（父本）×小尾寒羊（母本）F1代（杜寒F1）、B组为杜泊羊×湖 羊F1代（杜湖F1）、C组为萨福克羊×小尾寒羊F1代（萨寒F1）、D组为萨福克羊×湖羊F1代（萨湖 F1）、E组为小尾寒羊纯繁（对照组），每组10只断奶公羔，进行90 d育肥试验。结果表明杜寒F1 组合平均日增重312 g/d、料肉比5.18∶1、纯收益798元，较对照组增收163元；萨寒F1组合日增 重296 g/d、料肉比5.45∶1、纯收益768元，增收133元；两组合发病率10%，低于对照组（30%）。 该模式通过全链条技术集成与轻简化数字管理协同，有效降低了标准化养殖操作门槛，可为 西北同类寒旱区中小养殖户肉羊产业升级提供参考。

关键词: 寒旱区；中小养殖户；肉羊育肥；技术集成；杂交选育