母黄牛发情周期的观察  

Observation on the Estrous Cycle of Female Yellow Cattle

作　　者：顾德章[1] 李怀靖 严忠云 于士举 李振东 李安山 王向军 

机构地区：[1]江苏县东海县畜牧兽医站,222300 [2]东海县种畜场 [3]石湖乡畜牧兽医站 [4]双店乡畜牧兽医站

出　　处：《黄牛杂志》1994年第4期12-14,共3页Journal of Yellow Cattle Science

摘　　要：根据观察结果：母黄牛的发情周期平均为21．9±4．9天，总体呈正态分布，个体变差为8～37天，差异极显著（P＜0．01）；发情周期的结构由发情期与休情期2个基本部分组成；发情周期因受年龄、季节、膘成等因素的影响而存在差异，但差异不显著（P＞0．05）The investigation showed that average estrous cycle of female yellow cat-tle was 21. 9 ± 4. 9days with the mormal distribution,the deviation of individuals was from 8to 37 days with significant difference (P＜0.01); the whole estrous cyole was composed of estrus and anestrus period and infleuenced by the factors of age,season and body condition with no significant divergence.

关 键 词：黄牛 发情周期 母牛 繁殖 

分 类 号：S823.3[农业科学—畜牧学]