摘要
统计分析地处高寒草原的某牧场草原红牛配种记录资料表明，草原红牛的发情与情期受胎率都明显地受季节的影响。群体发情频率表现春季（３－５月份）为发情旺季，占全年发情母牛的７０．７８％，特别是４月份占３４．０６％；夏季（６－８月份）次之，占２５．９４％；秋季（９－１１月份）极少发情，仅占３．２７％；冬季（１２－翌年２月）几乎没有发情者。情期受胎率的变化规律与发情变化规律相似，也为春季最高，夏季次之，秋季较低，分别为６６．１５％、３６．８７％、２５．００％。
The results showed that heat rate and NR rate of Red steppe cattle were affected by different season significantly in statistical analysis of breeding records.The heat rate of flocks was highest (70.78%) at Springseason (3-5 month),was second (25.94%) at summer season (6-8 month) was a few heat (3.20%) at antumn season (9-11 month) and was few heat at winter season (12-follow 2 month) in 4 seasones.The effects of different season on NR rate was simillar with heat. NR rate was 66.15%,36.87% and 25.00% at spring,summer and autumn respectively.
出处
《家畜生态》
1998年第1期9-12,共4页
Ecology of Domestic Animal
关键词
高寒草原
季节
草原红牛
繁殖性状
受胎率
Grassland of Paramo type, season, Red steppe cattle, breeding
