摘要
在环青海湖地区的天峻 ,海晏和共和三县进行天然草场放牧牦牛和藏羊的生长发育测定。从各县选取至少 6个不同年龄组的牦牛和藏羊 ,每个年龄组至少 50头试验动物 ,进行连续 3天的放牧前空腹称重。用非线性回归法分析数据 ,用Brody模型和三次方程预测牦牛和藏羊的生长曲线。结果表明 :①三次方程是最适合牦牛和藏羊的生长曲线 ;②天峻牦牛的生长效率最高 ,尽管海晏牦牛的初生重最大 ,但其生长速率最低 ;
WT6BZ]At least 6 different isoage yak and Tibetan sheep groups were subjected to the growth trial,under the condition of grazing in the nature pastureland in Gonghe,Tianjun and Haiyan in surrounding Qinghai Lake area.Cubic equation was proved to be the most suitable growth model both for yak and for Tibetan sheep.Tianjun yak has the highest growth efficiency,Though Haiyan yak has the highest primary body weight,the growth rate was lowest.The best stocking time for yak and Tibetan sheep was summarized in Table 11. [WT6HZ]
出处
《中国草食动物》
2001年第4期6-9,共4页
China Herbivores
