Northeast L. Chinensis Grassland Soil Microbes Of Different Habitats And The Relationship Of Soil Physical And Chemical Properties

The report is focusing on typical Leyiaus chinensis community which was grazed in different intensity in the leymus chinensis grassland in northeast China. We determined the soil microorganisms amount, microbial biomass, soil respiration rate and activity of soil enzyme(soil catalase, incertase and polyphenol oxidase), environmental factors as well after examination of that particular area. We studied and analyzed the relationship between them due to the different season.The consequence of examinations showed that soil microorganism, soil chemical properties are different between the protecting, grazing and soil salinity area. The quality of Microorganism amount, microbial biomass, soil respiration rate and activity of soil enzyme have been reducing by the raising of grazing activities. The soil microorganism amount, microbial biomass, respiration rate and soil enzyme showed a single-peak curve reached at the top between July and August during the year.According to the results of significance test that soil microbial biomass was positively correlated with soil moisture, soil temperature, soil organic matter content, total~N and -P, and avallable~N. The correlations between them have reached significant or extremely significant level. But the correlation between microbial biomass and soil PH showed negatively. There was no significant correlation between microbial biomass and available-P.Soil microbial biomass in different environment was significant or extremely significant positively correlated with catalase and incertase. There was no significant correlation between microbial biomass and poly-phenol oxidase. Regression analysis showed that it was linear positive correlation between soil respiration rate and incertase, catalase as well.