【摘要】 通过资料分析与现场观察,研究了辽宁绒山羊的繁殖规律。结果表明:辽宁绒山羊发情时间主要集中在10月上旬和中旬,发情周期平均为19.23 d,发情持续期平均为35.62 h,母羊的性成熟平均为6.12月龄,初配年龄为18.12月龄,妊娠期为148.17 d,第一情期受胎率为83.61%,产羔率为121.62%,双羔率为21.28%,断奶成活率为98.64%,繁殖成活率为96.43%。说明辽宁绒山羊母羊在繁殖上具有明显的季节性和时间性,而且具有受胎率、断奶成活率和繁殖成活率高的优点。更多还原

【Abstract】 Reproductive laws of Liaoning cashmere goats are clarified after data analysis and field observation.The result indicates that the estrous time of Liaoning cashmere goats concentrates on the former(20 d) of October every year.The estrous cycle averagely maintains for 19.23 d.It keeps 35.62 h for each estrous period.Ewe sexual maturity comes averagely at 6.12 months.The first service age is 18.12 months.Pregnancy duration is 148.17d.The pregnancy rate for first estrus is 83.61%.Birth rate is 121.62%.Twin lamb rate is 21.28%.Weaning survival rate is 98.64%.Reproduction survival rate is 96.43%.It shows that reproductive performance of Liaoning cashmere goats has obvious seasonal and timing character.And it also has the priorities of high pregnancy rate,high weaning survival rate and reproduction survival rate.更多还原