Abstract:

This paper deals with some ecophysiological characteristies of plant growth, parameters of physiology, material accumulation and community composition in apline bushland. The results are as follows:

1 Leaf area index and average rate of growth of some species of Gramineae, Cyperaceae m Dasiphora fruticosa alpine shrub are increased with decreaded grazing intensity. The height and coverage of the community were negatively correlated with grazing intensity (P<0.001).

2. Changes of the aralytical growth parameters: LAR, SLA, LWR and LAI were negatively correlated with grazing intensity. Leaf area index was positively correlated with biomass (P>0.005); Aboveground biomass was negatively correlated with grazing intensity (P<0.001).

3. The species numbers of Gramineae, Cyperaceae in Dasiphora fruticosa shrub community were decreased in heavily grazed area and increased in lightly grazed area. But the proportion of Forb was increased with heavy grazing and decreased with light grazing. Thus light grzaing in alpine scrub showed profitable for plant growth and regeneration.