简阳大耳羊繁殖性能研究

Reproductive Performance of Jianyang Daer Goat

利用简阳大耳羊新品种世代选育过程中的系统资料,对简阳大耳羊繁殖性能进行了系统研究。结果表明:简阳大耳羊发情周期平均20.66 d,发情持续期平均48.52 h,妊娠期平均148.76 d;母羊全年均可繁殖配种、产羔,全年产羔仍然遵循"春配秋产、秋配春产"的规律;四世代初产母羊平均产羔率153.51%,经产母羊242.41%;年均产羔1.75只;四世代公羔平均初生重3.10 kg,母羔平均初生重2.95 kg。表明简阳大耳羊具有多胎、多羔,常年发情产羔,羔羊初生重较大,繁殖性能好的优良特性。

The systemic data in generation selection were used to study the reproductive performance of Jianyang Daer goat. The results showed that the estrous cycle of Jianyang Daer goat was 20.66 d, the estrous duration was 48.52 h, and the pregnancy du- ration was 148.76 d. The ewe could breed yearly, and abided by the rule of mating in spring and yeaning in fall, or mating in fall and yeaning in spring. The lambing rates were 153.51% and 242.41% for primiparity and multiparity respectively. The yearly average lambing was 1.75 fetuses. The birth weights were 3.10 kg for male and 2.95 kg for female respectively. It showed that the goat possessed the characteristics of muhiplets, empathema and yean perennial.The reproductive performance was fine.