The Comparison of Community Biomass and Environmental Condition of Five Vegetational Type in Alpine Meadow of Haibei, Qinghai Province

The pattern of plant specific composition and biomass difference at different vegetational type were analyzed in alpine meadow . The result suggested that the distribution of vegetational type correlated with soil humidity and soil temperature obviously. Soil humidity decreased whereas soil temperature increased corresponding to five different vegetational type which was Kobresia tibetica meadow, Potentilla fruticosa shrub meadow, Kobresia humilis meadow, restoring Kobresia humilis meadow and Kobrea pygmaea meadow, respectively. The number of plant species showed the pattern like this: K. humilis meadowP. fruticosa shrub meadow K. pygmaea meadow restoring K. humilis meadow K. tibetica meadow. The above-ground biomass showed the pattern like this: K. pygmaea meadow K. humilis meadow P. fruticosa shrub meadow K. tibetica meadowrestoring K. humilis meadow. The bellow-ground biomass showed the pattern as bellow : P. fruticosa shrub meadow K. humilis meadow K. pygmaea meadow restoring K. humilis meadow, and their turnover value in 1 year showed the pattern like this: P. fruticosa shrub meadow restoring K. humilis meadow K. pygmaea meadow K. humilis meadow. In this paper, we measured the content of organic matter in different meadow soil at different seasons. The content of organic matter of soil (0~40 cm) at four vegetational types showed the pattern like this : K. pygmaea meadowP. fruticosa shrub meadow K. humilis meadowrestoring K. humilis meadow, whereas the content of organic matter of 0 - 10 cm soil showed the pattern as bellow: P. fruticosa shrub meadow K. humilis meadowK. pygmaea meadowrestoring K. humilis meadow.