Research On The Influencing Factors Of Microbial Community Structure And The Anaerobic Denitrification Rate Of The Liaohe River Mouth Wetlands

Microbes as decomposition of the wetland ecosystem, not only to promote thecirculation of materials and energy flow of the wetland ecosystem, restricting thedifferentiation and succession of marsh wetland types.If studying wetland ecosystemof soil microorganisms，it is very important in understanding microbial diversity anddepth of the wetland ecosystem structure and function of wetlands.Biogeochemical behavior and the ecological significance of nitrogen in thewetland sediments can reveal not only through the study of wetland nitrogen cycle,but also to provide a scientific basis for wetland ecosystem productivity, soil qualityevolution of nitrogen interface process. In view of the Liaohe vegetation degradation,soil salinization, oil pollution, water quality and sediment eutrophication phenomena,through on-site simulation study of vegetation, salt, oil, and C/N Liaohe River mouthwetland soil microbial communities structure of denitrification rate changes has beenthe mouth of Liaohe microbial remediation of degraded wetlands and wetlandnitrogen cycle to provide a theoretical basis.The simulation study found that vegetation, salt, oil, C,/N is larger than theimpact on microbial community structure and diversity. Salt and the number ofmicroorganisms was significantly negative correlation to reduce the diversity of soilmicroorganisms, but reduced to a lesser extent. Liaohe River mouth wetlands suitablefor microbial growth, the best C/N ratio is10:1, the high concentrations of C/Nratio but will reduce the diversity of soil microorganisms. The oil will inhibit thegrowth of soil microbes, reducing the diversity of soil microorganisms. Affect theLiaohe River mouth wetland denitrification in temperature, pH, moisture content,which denitrification and temperature were positively correlated, the most appropriatemoisture content between37%-40%, the most suitable pH of7.5-8.5. When the wetland soil salinity increased, inhibition of the denitrification rate; imposed by the C/N factors can promote wetland soil denitrification. Long-term anaerobic conditions,the bare flat soil microbial diversity index, some salt and C/N ratio under theinfluence but can increase soil microbial diversity.