摘要
为了阐明不同月份对内蒙古地区规模化牧场奶牛繁殖性能的影响,本研究收集了2014年2月~2016年10月内蒙古自治区的32个规模化牧场10万头奶牛的繁殖数据,并进行统计分析,结果表明:成年母牛在3月和4月份的受胎率最高,而7月、8月和9月份最低,差异显著(P<0.05);4月、11月、12月份的21d妊娠率最高,7月、8月和9月份最低(P<0.05);青年母牛3月和12月份的流产率显著高于6~10月份(P<0.05)。
In order to study effect of season on reproduction performance of heifers and cows in Inner Mongolian dairy farms, a total of 100000 heifers and cows were collected from 32 dairy farms from July of 2014 to June of 2016 in Inner Mongolia. The results show that： （1） Cows＇conception rate is highest in March and April, but it is lowest in July, August and September, there shows significant difference（P〈0.05）. The pregnancy rate is highest in April, November and December, but it is lowest in July, August and September, there is no significant difference（P〈0.05）.（2） Abortion rate of heifers is higher in March and December than June to October（P〈0.05）
出处
《中国奶牛》
2018年第1期23-26,共4页
China Dairy Cattle
基金
杨凌职业技术学院科学研究基金(A2016043)
国家后备牛创新合作平台项目
关键词
季节
繁殖性能
成母牛
青年牛
Season
Reproduction performance
Cows
Heifers
