摘要
通过研究不同胎次、产犊季节和犊牛初生重、犊牛性别、产犊方式等因素对荷斯坦牛难产程度的影响,旨在降低难产率,帮助牛场制定合理有效的繁殖管理措施。试验收集上海金山奶牛场2018年1~12月产犊难易记录共2 812条,采用GLM模型对影响奶牛难产程度的因素进行分析。结果表明,胎次、产犊季节、犊牛初生重、犊牛性别、产犊方式对难产程度有显著影响(P<0.05),且第二胎奶牛自然分娩比例最高;春季和夏季产犊低难产度所占比例较大;随着犊牛初生重的增加,难产程度逐渐增大;生公犊难产程度越大;双胎生产方式难产度增大。
The aim of this study was to investigate effects of different parity,calving season and birth weight,calf sex,calving type on dystocia degrees of Holstein.A total of 2812 records of the dystocia degrees were collected,the effects on dystocia degrees were analyzed by SPSS GLM.It reveals that the parity,calving season,birth weight,calf sex,and calving type had significant effects on the degree of dystocia(P<0.05),the degree of dystocia had significant decreases in the second parity.The percentage of dystocia is high in spring and summer,with the increase of the weight of the calves,the degree of dystocia gradually increases,it will also increase in the mate calves and the twins.
作者
李倩倩
吴洁
刘军彪
唐椿
孙先枝
毛宏祥
刘光磊
LI Qian-qian;WU Jie;LIU Jun-biao;TANG Chun;SUN Xian-zhi;MAO Hong-xiang;LIU Guang-lei(Bright Farming Co.,Ltd,Shanghai 200436;Shanghai Dairy Cattle Breeding Center,Shanghai 200436)
出处
《中国奶牛》
2019年第7期29-32,共4页
China Dairy Cattle
基金
夏季优质生鲜乳生产关键技术的研究示范(沪农科攻字(2019)第1-2号)
关键词
产犊难易
胎次
产犊季节
初生重
Dystocia degrees
Parity
Calving season
Birth weight
