摘要
[目的]探讨中国美利奴羊(新疆型)初生重的影响因素,收集新疆拜城种羊场1984 ~ 2012年度共28年116 164条中国美利奴羊(新疆型)配种及产羔记录.[方法]采用SAS(8.1)软件的GLM程序,分析群别、出生年度、产羔月份、母羊年龄、性别对中国美利奴羊(新疆型)初生重的影响.[结果]群别、出生年度、产羔月份、母羊年龄、性别5个因素对初生重有极显著的影响(P<0.01).[结论]统一牧场的饲养管理,在冬季枯草期对妊娠母羊适时补饲有利于提高羔羊初生重;统一配种时间,合理调整产羔季节有利于降低羔羊初生重的差异;适当控制母羊初产年龄、及时淘汰8岁以上母羊,增加4~7岁能繁母羊的存栏量对提高羔羊初生重也是有利的.
[Objective] The purpose of this study is to analyze the influence factors of birth weight in Chinese merino sheep (Xinjiang type).[Method] The group types,the birth dates,the ewe age and the gender that influenced the birth weight of Chinese Merino sheep (Xinjiang type) were analyzed by using GLM procedure of the SAS (8.1) software.[Result]The results showed that the group of lambs,the lambing year,the birth month,the ewe age and the gender highly affected the birth weight (P 〈 0.01).[Conclusion] These results indicated that unified feeding and management,timely supplementary feeding for pregnant ewes were conducive to increase the lamb birth weight in winter hay period.Unified breeding time and reasonable adjustment lambing season were good for reducing differences in the lamb birth weight.The appropriate methods to control the first lambing age,to eliminate ewes aged more than eight years old,and to improve the proportion of reproductive ewes aged between 4 and 7 were useful to increase birth weight of lambs.
出处
《新疆农业科学》
CAS
CSCD
北大核心
2014年第4期735-740,共6页
Xinjiang Agricultural Sciences
基金
"十二五"新疆维吾尔自治区重大专项"新疆毛
绒羊新品种选育与产业化示范"(201230116-6)
国家农业科技成果资金项目"优质超细毛羊生产配套技术推广与示范"(2012GB2G400493)
国家绒毛用羊产业技术体系建设专项(CARS-40)
关键词
中国美利奴羊(新疆型)
初生重
影响因素
Chinese Merino sheep (Xinjiang type)
birth weight
influencing factors