黑龙江省松嫩低平原区盐渍化地球化学特征

根据松嫩低平原区多目标地球化学调查成果,以松嫩平原土壤中盐渍化主要组成元素为研究对象,通过元素含量变化和元素间的相关关系,探讨了盐渍化地区元素分布分配的地球化学规律。盐渍化土壤存在pH值的临界区间,盐渍化的强弱与Cl、S、Na等元素的含量密切相关。盐渍化与土壤沙化在空间上交互作用,共同造成本地区土壤的退化。松嫩平原无论表层土壤还是深层土壤中,Cl的平均含量比较低,导致Cl在土壤中局部强烈富集,可能与地下水化学类型与高矿化度相关。

Geochemical Distribution Characteristics of Salinization in the Song-Nen Low Plain

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 of chemical composition of the underground water.