茨×藏F_1羔羊与藏系羔羊生长速度比较

Comparison of Growth Rate of First Filial Generation Lamb of Tsigai and Tibetan with Tibetan lamb

从母羊孕后期开始，到羔羊秋季育肥结束，历时１２个月，对茨×藏Ｆ１羔羊与藏系羔羊各阶段的生长速度作了比较。结果：茨×藏Ｆ１羔羊的初生重、断奶重、夏季牧场放牧增重、秋季育肥期增重和全期增重分别比藏系羔羊提高６．４２％、１９．６３％、１４．３４％、１５．８９％和１７．３４％，９月龄平均体重达到３１．２２ｋｇ，比藏系羔羊提高１５．８９％，表现出明显的杂种优势。

Each step growth rate of first filial generation lamb of Tsigai and Tibetan with Tibetan lamb was compared from later stage of pregnant ewe to the end of lamb autumn fattening period within 12 monthes.The result indicated :the birth weight,weaning weight,gain in summer pasture,gain in autumn fattening period and the whole gain of first filial generation lamb of Tsigai and Tibetan was 6.42%,19.63%、14.34%,15.89% and 17.34% higher than those of Tibetan lamb resp.,the average body weight of 9 month old was 31.22 kg,was higher than Tibetan lamb with 15.89% showing sighificant hybrid vigor. \ \