摘要
通过对252头具有连续泌乳月奶牛的记录完整的档案分析 ,可将奶牛泌乳类型分类三种类型 ,即平稳型、剧降型和波动型。其中平稳型占54.7 %(138/252) ,剧降型占28.1 %(71/252) ,波动型占17.2 %(43/252)。并对奶牛的各项繁殖指标与其泌乳类型之间的相互关系进行了统计分析。统计结果表明 ,奶牛分娩后受胎时间、不孕症和性周期紊乱在不同的泌乳类型间存在着差异 ,分娩后每次发情时间。
ARSTRACT :Accordingtorecordsaboutin252cows, whichhavecontinuouslysecretedformanymonths,the milksecreingcurvecanbedividedinto3types:stable declining andundulatetype.Thefirsttypeoccupied 54.75%(138/252),thesecondoneoccupied28.1%(71/ 252),thethirdoneoccupied17.2 %(43/252).Theinter relationshipbetweeneveryreproductivetargetandse cretingcruvehasbeenstudied.Thestatisticalresults suggestpregcenanttimeafterparturition,sterilityand sexcycledisorderhavedifferencesinthedistinct curvestypes,butthefirstestroustimeandretained placentanoobviousdifferenceindistinctcurvetypes.
出处
《河南畜牧兽医》
2000年第3期6-7,共2页
Henan Journal of Animal Husbandry and Veterinary Medicine
关键词
泌乳类型
繁殖力
奶牛
繁殖障碍
milksecreting type,fertility,stable type,declining type,undulate type
