摘要
为考察崇明白山羊母羊繁殖性能,对某崇明白山羊扩繁羊场母羊的产羔间隔、产羔月份、胎产羔数、羔羊初生重和断奶重等指标进行统计,还分析了高产和低产母羊比例,以及不同产羔间隔的母羊比例.研究表明:崇明白山羊母羊发情具有一定的季节性,有68.6%的母羊在春秋两季发情,分别有38.9%和29.7%的母羊在1-4月和7-9月产羔;约65%的母羊产羔间隔在185-250 d,多数母羊2年可以繁殖3胎,更有一些优秀母羊可年产2胎;母羊胎均产羔数2.01只以上,活羔率在93.9%以上;各年度羔羊的初生重分别是1891.2 g、1906.4 g和2007.3 g,断奶重分别是9799.8 g、9981.6 g和10007.2 g.结果表明崇明白山羊母羊繁殖性能等种质特性保存良好,该扩繁羊场的保种选育工作具有一定的成效.
The reproductive traits,such as lambing interval,lambing month,litter size,birth weight and weaning weight were analyzed.The proportion of high and low yield ewes and the proportion of ewes with different lambing intervals were also analyzed.The research showed that the estrus of Chongming white goat ewes had a certain seasonality.Approximately 68.6%ewes’estrus are in spring and autumn,38.9%and 29.7%of the ewes are lambing in January—April and July—September,respectively.About 65%of the ewes’lambing interval is 185—250 days,most ewes could reproduce 3 births during 2 years,and some more excellent ewes could reproduce 2 births annually.The lambing rate is more than 201%,the rate of live lamb is more than 93.9%.The average lamb birth weight in each year is 1891.2 g,1906.4 g and 2007.3 g,respectively.The weaning weight is 9799.8 g,9981.6 g and 10007.2 g,respectively.The results indicate that the conservation of reproductive traits of Chongming white goat are well done,and the conservation and breeding works of the farm have achieved certain achievement.
作者
廖荣荣
林月霞
吕玉华
LIAO Rongrong;LIN Yuexia;LüYuhua(Institute of Animal Science and Veterinary Medicine,Shanghai Academy of Agricultural Sciences,Shanghai,201106,China)
出处
《上海农业学报》
2020年第2期89-93,共5页
Acta Agriculturae Shanghai
基金
上海市农口系统青年人才成长计划[沪农青字(2017)第1-16号]
上海市农业科学院青年助跑计划[ZP173]
上海市科委项目(15391912901)
上海市种业发展项目[沪农科种字(2017)第3-3号
沪农科种字(2015)第14号]
上海市科技兴农推广项目[沪农科推字(2016)第2-1-5号]。
关键词
崇明白山羊
繁殖性能
产羔数
断奶重
Chongming white goat
Reproductive traits
Litter size
Weaning weight
