Rhizosphere Soil Microorganisms of Different Grassland Types
To investigate the impact of different alpine grassland vegetation on soil microorganisms,the number of three major types of soil microorganisms in six different grassland types were determined by soil so-lution dilution plate counting method.The results showed that the number of rhizosphere soil microorganisms(fungi,bacteria,and actinomycetes)in the Carex myosuroides and Carex giraldiana with Dosiphora fruticosa was the highest among different types of grasslands measured.The number of bacteria,fungi,and actinomycetes decreased gradually with the increase of soil depth in different types of grasslands.The number of soil bacteria and actinomycetes was highest in July for different types of grassland soils,while the number of soil fungi was highest in May for different types of grassland soils at different times.