Abstract:

On the basis of the results of multiobjective geochemical exploration in the region of Song-Nen low plain, the paper studies composition of the elements contributed to the soil salinization in the SongNen plain. By investigating the element content changes and relationships among different elements, the paper discusses the geochemical distribution characteristics of the salinization region. A critical interval of pH value is involved in salinization soil,and the degree of salinization is closely related to the contents of Cl, S, Na and other elements.The interaction of salinization and desertification are acted on the soil in the space, and these actions jointly caused the soil degradation in this area.Either in the surface soil or in the deep-surface soil of the Song-Nen plain, the content of Cl is relatively low, which results the strong enrichment of Cl locally, and which is related to the high salinity ofchemical composition of the underground water.

Key words: soil, salinization, Song-Nen low plain, geochemistry