无角陶塞特、波德代、萨福克与小尾寒羊杂交试验研究

引进无角陶塞特、波德代、萨福克与张掖市本地饲养的小尾寒羊进行杂交改良,杂一代表现出明显的杂种优势和肉用特征。在相同的饲养条件下,与小尾寒羊比较,陶寒杂交Fl羔羊公母平均初生重比小尾寒羊提高20.5%,1月龄、3月龄和6月龄体重分别提高21.4%、14.4%和14.5%,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13.3%,体长增加16.7%,胸围增加19.1%,管围增加10.7%;6月龄胴体重提高38.21%,净肉重提高47.09%。波寒杂交Fl羔羊公母平均初生重比小尾寒羊提高17.7%,1月龄、3月龄和6月龄体重分别提高19.1%、20.8%和16.0%,初生至6月龄的平均日增重提高16.0%;6月龄平均体高增加14.5%,体长增加16.1%,胸围增加17.8%,管围增加10.7%;6月龄胴体重提高47.07%,净肉重提高58.52%。萨寒杂交Fl公母平均初生重比小尾寒羊提高14.0%,1月龄、3月龄和6月龄体重分别提高12.8%、13.3%和14.4%,初生至6月龄的平均日增重提高14.4%;6月龄平均体高增加31.5%,体长增加17.6%,胸围增加19.2%,管围增加11.4%;6月龄胴体重提高45.36%,净肉重提高57.64%。

Research of Poll Dorset Sheep, Borderdale Sheep, Suffolk Sheep and Small-tail Han Sheep Hybridization

Poll Dorset sheep, Borderdale sheep and Suffolk sheep were introduced to crossbreed local Small-tail Han sheep, F; generation showed obvious heterosis. At the same feeding condition, average birth weight of FI from Poll Dorset sheep ; Small-tail Han sheep increased by 20.5% compared with Small-tail Han sheep, body weight of 1-month, 3-month and 6-month increased by 21.4%, 14.4% and 14.5%, 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 13. 3%, 16. 7%, 19. 1% and 10.7%, respectively. Carcass weight and net meat increased by 38.21% and 47.09 %/6, respectively. Average birth weight of F; from Borderdale sheep X Small-tail Han sheep increased by 17.7% compared with Small-tail Han sheep, body weight of 1- month, 3-month and 6-month old increased by 19.1%, 20.8 % and 16.0 %, respectively. Average daily weight gain from birth to 6-month old increased by 16.0%. Average body height, length, heart girth and cannon circumference increased by 14.5%, 16.1%, 30.9% and 17.8%, respectively. Carcass weight and net meat increased by 47.07% and 58.52%, respectively. Average birth weight of F; from Suffolk sheep X Small-tail Han sheep increased by 14.0% compared with Small-tail Han sheep, body weight of 1-month, 3-month and 6-month old increased by 12. 8%, 13. 3% and 14. 4%, respectively. Average daily weight gain from birth to 6-month old increased by 14.4%. Average body height, length, heart girth and cannon circumference increased by 31. 5%, 17. 6%, 19. 2% and 11.4%, respectively. Carcass weight and net meat increased by 45. 360/00 and 57.64%, respectively.