黎塘岩溶区土壤铁锰结核初步研究  

Fe-Mn Nodules in Karst Soil of Litang District

作　　者：苏春田[1] 唐健生[1] 单海平[1] 陈宏峰[1] 夏日元[1] 邹胜章[1] 陈忠将[1] 

机构地区：[1]中国地质科学院岩溶地质研究所,广西桂林541004

出　　处：《河南农业科学》2008年第9期65-68,共4页Journal of Henan Agricultural Sciences

基　　金：广西科学基金资助项目(桂科基0639066);中国地质调查项目(1212010634803)

摘　　要：对黎塘岩溶区土壤铁锰结核分布特征、物理性状和地球化学特征的初步研究表明:铁锰结核含量在横向和纵向上具有一定差异,A层铁锰结核含量一般高于B层。铁锰结核的化学组成中仍以SiO2,Al2O3和Fe2O3为主,但Fe2O3的含量明显增加,成为铁锰结核中含量最多的氧化物,MnO的含量也有一定程度增加;铁锰结核对重金属具有明显的富集效用,其富集顺序为Cr6+>Pb>Co>Zn>Ni>Ba>Li。The traits of distribution and physics, the element geochemistry characteristics of Fe--Mn nodules were studied in karst area in Litang district. Contents of Fe--Mn nodules were different in horizontal and vertical and its contents were higher in A layer than in B layer. Compared with correspongding soils, SiO2, Al2O3 and Fe2O3 were still the main chemical elements in Fe--Mn nodules. However, the Fe2O3 content increased significantly and was the most in the oxides, but the MnO content increased to some extent. Fe--Mn nodules enriched heavy metal elements, and the enrichment order of the heavy metals was Cr^6 ＋ 〉 Pb〉Co〉Zn〉 Ni〉 Ba〉 Li.

关 键 词：岩溶 土壤 铁锰结核 重金属 富集效应 

分 类 号：S153.61[农业科学—土壤学]