Effect of high and low pasture allowance during pregnancy on ewe lamb pregnancy performance

摘要：

It is established that breeding ewe lambs ( 8‐9 months of age,hogget) can negatively affect their 18‐month liveweight and breeding performance (Kenyon et al.2007).Therefore the aim of any ewe lamb breeding regimen should be to ensure they gain liveweight during their first pregnancy.However,under housed,concentrate feeding conditions high total liveweight gains in pregnancy have been associated with increased fetal loss,light lamb birthweight and lower lamb survival rates to weaning ( Wallace et al.2000 ).The effects of ewe lamb liveweight gains during pregnancy under pastoral grazing systems has not been thoroughly examined in New Zealand.

关键词： hogget lamb growth nutrition

作者: P.R.Kenyon F.J.Mulvaney S.T.Morris D.M.West

作者单位: Institute of Veterinary,Animal and Biomedical Sciences,Massey University,Private Bag 11-222,Palmerston North,New Zealand

会议类型: 国际会议

会议名称: 2008世界草地与草原大会

会议地点: 呼和浩特

会议语种:英文

在线出版日期: 2008-06-29（万方平台首次上网日期，不代表论文的发表时间）