STUDY ON SOIL MICROBIAL ACTIVITIES AND THEIR INTERRELATIONSHIPS IN ZHALONG WETLAND IN NORTHEAST CHINA

This study took Zhalong Wetland in northeast China as the experimental object, and conducted in-depth research on the distribution patterns of soil nutrients, soil microbial characteristics, and soil enzyme activity under different salinity levels. The results showing that in the soil microbial community structure of Zhalong Wetland, bacteria account for the main part, followed by actinomycetes, and the number of fungi is the least. Soil nutrients, microbial community quantity, microbial biomass carbon and nitrogen were distributed vertically in different degraded wetlands, showing obvious characteristics, and the distribution characteristics were different. The distribution of soil enzyme activity is complicated by many factors. There was a close relationship between soil nutrients and soil microbial characteristics during the degradation of wetland meadow. While, there was no significant relationship between total P and pH and soil microbial activity (P > 0.05). The correlation between soil nutrients and microorganisms in natural wetlands was analyzed by principal components, and the comprehensive evaluation table of soil total nutrients and the relationship table between soil nutrients and microorganisms were constructed.