摘要
分析 1996 - 2 0 0 1年间天津瑞金种羊场和天津东丽种羊场 831只鲁西小尾寒羊母羊的繁殖性能记录资料,以确定母羊年龄结构对繁殖性能的影响效果。结果发现,每只配种母羊的最大产羔数为 2.5 0,断奶数为 2.2 2;每只产羔母羊的最大产羔数为 2.96,断奶数为 2.6 3,均发生在 3.5岁母羊组。这一年龄组的母羊一胎多羔率也较高,单羔、双羔、3羔、4羔、5羔以上的发生率依次为 2.6 %、2 6.4 %、4 6.5 %、2 2.2 %和 2.3%。羔羊成活率以双羔最高,为 92 %。
The reproductive capacity records from 1996 to 2001 of 831 Luxi Xiaowei Hanyang ewes in Tianjin Ruijin breeding sheep farm and Tianjin Dongli breeding sheep farm were analyzed to learn the influences of age structure on the reproductive capacity. The results show that the maximum reproductive capacity of each breeding ewe in all groups is 2.50 and the weaners are 2.22 , which is in 3.5 years old group, while that of each lambing ewe is 2.96 and the weaners are 2.63 and is also in the same group. For this group, it's also of high ratio of more lambs at a litter. The percentage of one, two, three, four and five lambs every litter is 2.6%, 26.4%, 46.5%, 22.2% and 2.3%, respectively. The survival rate is the highest in the group of two lambs and is 92%.
出处
《天津农学院学报》
CAS
2002年第2期48-50,共3页
Journal of Tianjin Agricultural University
关键词
鲁西小尾寒羊
年龄结构
繁殖性能
Luxi Xiaowei Hanyang
age structure
reproductive capacity
