摘要
金堂黑山羊是经长期群选群育而形成的优良肉用山羊品种,主要分布于金堂县及临近区域。本研究结果表明:金堂黑山羊性成熟早、初情期为3月龄左右,母羊初配年龄5～6月龄,公羊初次利用年龄为8～10月龄。母羊发情周期为20.8±1.47d,发情持续期48.3±15.4h;妊娠期为149.19±2.31d,产后第一次发情的时间均为28.67±5.39d,产配间隔69.53±16.48d;母羊产羔率初产为179.68%,经产为241.85%;窝平产羔数为2.26±0.27只,年均产1.89胎,且年产3胎的母羊占8.05%;羔羊平均初生重公羔为2.37±0.36kg,母羔为2.28±0.35kg。表明金堂黑山羊具有多胎、多羔,常年可发情配种,繁殖力高的肉用优良品种。
Jintang Black Goat is an excellent breed for meat_type after long_term herd selecting and breeding,which is distributed mainly over Jintang and its neighbour areas.From the investigation,it is showed that Jintang Black Goat is a breed of precocious sexual maturity with puberty at age of3month proximately,first mating age of ewe at5_6month and first scrvice of ram at age of8_10month,repectively.The average estrous period of ewe is20.8±1.47days,estrus duration48.3±15.4hours.Its gestation pcriod is149.19±2.31days,rebreeding time 28.67±16.48days,the interval between farrowing and breeding69.53±16.48days.Its lambing percentage are179.68%and241.85for primiparous and multiparous,respectively.Its litter sizc is2.26±0.27heads,1.89litter per year,and among them8.05%ewes3litters.The average birth weights are2.37±0.36kg,and2.28±0.35kg for male and female,respectively.It can be concluded that Jintang Black Goat is a good breed of high reproductivily with prolificacy and continous mating.
出处
《四川畜牧兽医》
2002年第4期20-21,共2页
Sichuan Animal & Veterinary Sciences
基金
成都市科技局1998年市级重点科技攻关计划项目<金堂黑山羊品种选育及饲养配套技术试验示范>(编号:1998017)
