无角陶塞特、波德代、萨福克与蒙古羊杂交试验研究

引进无角陶塞特、波德代、萨福克与张掖市本地饲养的蒙古羊进行杂交改良，杂一代表现出明显的杂种优势。在相同的饲养条件下，与蒙古羊比较，陶蒙杂交F1羔羊公母平均初生重比蒙古羊提高24．6％，1月龄、3月龄和6月龄体重分别提高12．5％、16．1％和13．3％，初生至6月龄的平均日增重提高12．0％；6月龄平均体高增加14．3％，体长增加17．1％，胸围增加27．19／6，管围增加16．6％；6月龄胴体重提高29．92％，净肉重提高37．82％。波蒙杂交F1羔羊公母平均初生重比蒙古羊提高22．2％，1月龄、3月龄和6月龄体重分别提高13．0％、23．3％和15．3％，初生至6月龄的平均日增重提高14．5％；6月龄平均体高增加19．7％，体长增加19．7％，胸围增加30．9％，管围增加17．0％；6月龄胴体重提高33．88％，净肉重提高43．17％。萨蒙杂交F1公母平均初生重比蒙古羊提高21．3％，1月龄、3月龄和6月龄体重分别提高16．7％、15．2％和11．6％，初生至6月龄的平均日增重提高10．4％；6月龄平均体高增加47．8％，体长增加33．5％，胸围增加49．0％，管围增加26．8％；6月龄胴体重提高31．04％，净肉重提高42．02％。

Research of Poll Dorset Sheep, Borderdale Sheep, Suffolk Sheep and Mongolia Sheep Hybridization

Poll Dorset sheep,Borderdale sheep and Suffolk sheep were introduced to crossbreed local Mongolia sheep,F1 generation showed obvious heterosis.At the same feeding condition,average birth weight of F1 from Poll Dorset sheep ×Mongolia sheep increased by 24.6% compared with Mongolia sheep,body weight of 1-month,3-month and 6-month increased by 12.5%,16.1% and 13.3%,respectively.Average daily weight gain from birth to 6-month old increased by 12.0%.Average body height,length,heart girth and cannon circumference increased by 14.3%,17.1%,27.1% and 16.6%,respectively.Carcass weight and net meat increased by 29.92% and 37.82%,respectively.Average birth weight of F1 from Borderdale sheep ×Mongolia sheep increased by 22.2% compared with Mongolia sheep,body weight of 1-month,3-month and 6-month old increased by13.0%,23.3% and 15.3%,respectively.Average daily weight gain from birth to 6-month old increased by 14.5%.Average body height,length,heart girth and cannon circumference increased by 19.7%,19.7%,30.9% and 17.0%,respectively.Carcass weight and net meat increased by 33.88% and 43.17%,respectively.Average birth weight of F1 from Suffolk sheep ×Mongolia sheep increased by 21.3% compared with Mongolia sheep,body weight of 1-month,3-month and 6-month old increased by16.7%,15.2% and 11.6%,respectively.Average daily weight gain from birth to 6-month old increased by 10.4%.Average body height,length,heart girth and cannon circumference increased by 47.8%,33.5%,49.0% and 26.8%,respectively.Carcass weight and net meat increased by 31.04% and 42.02%,respectively.