THE COMMUNITY STRUCTURE OF ROSA XANTHINA LINDL. F. NORMALIS REHD ET WILS SCRUB AND ITS BIOMASS IN GUANDI MOUNTAIN, SHANXI PROVINCE

In this paper, the community structure of Rosa xanthina Lindl.f.normalis Rehd et Wils scrub and its biomass in the eastern exposure of Guandi Mountain, Shanxi Province, at an altitude of 1700m is investigated, and relationship among the hiomass and the community structure, dynamic suceession, community property is discussed. The biomass of scrub is predicated by using regression model, they are: R. xanthina w_(shoot)= 2.5289(D²H)^1.8988, w₍(leaves)=0.1521(D²H)^1.9236, w_(root)=1.9884(D²H)^1.9304; Hippophae rhamnoides L.Suhsp scnensis Rousi w_(shoot)=0.2993(D²H)^2.1344, W_(leaves)=0.1988(D²H)^2.1332, w_(root)=2.0269(D²H)^1.6113, in addition to this, the biomass of other shrubs and herbs is estimated by utilizing practical measured data in field Thus, the total biomass of scrub is 6.231 t/ha, including the shrab layer 4.867 t/ha, the herb layer 1.364 t/ha, in June.