广西河池市金城江区土壤地球化学特征

Geochemical characteristics of soil in Jinchengjiang District of Hechi City,Guangxi

通过开展广西河池市金城江区土地质量地球化学评价,研究金城江区表层土壤元素地球化学特征,为农作物种植结构调整、国土空间规划、生态环境保护等提供基础理论支撑和科学依据。研究结果表明,相比全国和广西背景值,研究区表层土壤以高N、Cd、Mn、Pb、Zn、Ni、Cr、As、F、Cu、Se、Mo值、低Na、Mg、Si、S、Corg、Ge、Al、Fe为特征,元素空间分布不均匀;同时元素在不同成土母质、土壤类型、土地利用类型单元中的富集贫化规律存在明显差异,与成土母质关系最为密切,两者存在明显的继承性;人类活动在一定程度上影响元素的空间分布。

Based on the geochemical evaluation of land quality in Jinchengjiang District of Hechi City,Guangxi,the geochemical characteristics of surface soil elements in Jinchengjiang District are studied in order to provide the basic theoretical support and scientific basis for crop planting structure adjustment,land space planning and ecological environment protection.The result shows that compared with the national and Guangxi background values,the topsoil is characterized by the high contents of N,Cd,Mn,Pb,Zn,Ni,Cr,As,F,Cu,Se and Mo,and the low contents of Na,Mg,Si,S,Corg,Ge,Al and Fe in the study area.The spatial distribution of elements is not uniform.At the same time,the enrichment and dilution of elements in different soil forming materials,soil types and land use type units are obviously different.It is closely related to the parent material of soil formation,and they have the obvious inheritance.Human activity affects the spatial distribution of elements to a certain extent.