摘要
在内蒙古高原上,由典型草原带向荒漠草原带过渡首先出现的荒漠草原群落类型——短花针茅草原,在空间分布上具有明显的地域过渡性,在时间动态上具有显著的波动性;而在适度的放牧条件下,则具有相对的生态稳定性。
In this paper, dynamics and ecological stability of Form, stipa breviflora dessert steppe were studied. Results show that the above-ground biomass of F. S. breviflora varied with annual precipitation and its different distribution in growth season. There are two kinds of above-ground biomass for it appears 's' and 'polynomial' in shape. The annual fluctuation of above-ground biomass is actually time scale dynamic of F. S. breviflora steppe. Under middle and light grazing disturbance, above-ground biomass of F. S. breviflora steppe community,productivity of a flock of sheep and weight of individual sheep are higher,even more than no grazing community of rest land,and it can maitain a good equilibrium. This equilibrium under grazing disturbance is ecological stability of F. S breviflora steppe.
出处
《中国草地》
CSCD
1990年第4期1-5,共5页
Grassland of China
