The paper reports comparative studies on the physiological ecological adaptiveness of K. humilis grown at different altitudes (Daban Mt.4000m a.s.l.; HaiBei station 3200m a.s.l.and Xizang 2200m a.s.l.) in Qinghai Xizang Plateau. Results showed that growth and matter accumulation of K.humilis at different altitudes had obvious differences. Plant height, leaf area, content of chlorophyll and dry matter of plants tended to decrease with increasing altitude. the content of carotentoid and flavonoid, p...