Pollution On Soil Of Dissolved Organic Matter And Characteristics Of Compounds

Soil is a multiphase environment, and it's not only the base of all organisms, but also one of the sink to environmental pollutants. Almost all bio-chemical reactions in soil are related with soil microbe. Once the pollutants enter into soil, they must react with the components of soil. Among them, the soil dissolved organic matter (DOM) and the microbial biomass are the most important factors that affect the fate, such as transport and transformation, of those pollutants in soil. Although the soil pollution and the dynamic and changes of microbial communities structures pay important roles in the origin, transformation and dynamic of DOM, the related studies are few.With the methods of microbial selective inhibition in laboratory and the polluted soil samples from field, using the dynamic and residual indicator to soil microbe, microbial biomass and amino sugars, the effects of soil pollution on the DOM production and dynamics, and the relationships among DOM, microbial biomass, amino sugars, and soil organic matter (SOM) are investigated in this paper.DOM, microbial biomass, amino sugars and SOM may be affected significantly by the kind, the duration, and the soil manage method, as well as the pattern of microbial communities.Because of the significant residue of amino sugars, they should not to be used as indicator to effects of routine and accident soil pollution to microbe, or to the dynamic of SOM, but to the effects of long-term pollutions on the structural changes of microbial communities, and to the accumulation of microbial origin organic matter.In the polluted soil, between DOM and amino sugars, especially DOM and muramic acid, there are significant relationships. There are also strong relationship between DOM and SOM, especially DOM and soil organic nitrogen (SON). It demonstrates that the main source of DOM is origin from the part that contents the organic nitrogen.In summary, the relationships among DOM, microbial biomass, amino sugars, and SOM are studied in certain degree in this paper. Additional, the origin, components, and dynamic of DOM were studied using the amino sugars as an indicator. Those could provide valuable scientific evidences for the furthermore studies on the dynamic of DOM affected by the soil pollution, and the amendment and re-utilization of polluted soil.