摘要
对法系纯繁夏洛来母牛生殖性能的统计表明:初情期平均13.0±1.89月龄,性成熟期平均14.62±2.6月龄,始配年龄21.56±1.23月龄,绝情期15岁左右;发情周期平均20.51±8.49d,卵泡出现至排卵结束约39.26±8.28h;妊娠期平均283.91±8.05d;犊牛初生重43.49±6.85kg;产后发情平均71.18±49.25d;产犊间隔平均452.26±124.59d。母牛淘汰年龄平均94.77±40.84月龄,利用年限平均69.94±40.66月龄,终生产犊4.78±2.95头。
Statistics of reproduction performance from French Pure Charolais cow demonstrated that the ageo of the first estrus, sex maturation, and first insemination were 13.0±1.89, 14.62±2.60 and \{21.56\}±1.23 months, respectively. Estrus-ending age was at 15th year. Estrus cycle, ovulation lasting period, gestation period and calf birth weight were 20.51±8.49 days, 39.26±8.28 hours, 283.91±\{8.05\} days, and 43.49±6.85 kg, respectively. First estrus after calving were commonly at the 71.18±\{49.25\} days after calving. Calving interval, age of culling, longevity and whole life clving times were 452.26±124.59 days, 94.77±40.84 months old, 69.94±40.66 months and 4.78±2.95.
出处
《黄牛杂志》
2004年第2期21-25,共5页
Journal of Yellow Cattle Science
关键词
夏洛来牛
母牛
生殖性能
利用年限
引种
French Charolais cows
Reproductive performance
longevity
Calves
