中国岩溶2018，Vol.37Issue(1)：43-52,10.DOI:10.11932/karst2018y01
南宁市郊周边农田土壤—农作物系统重金属元素迁移特征及其影响因素
Characteristics of transfer and their influencing factors of heavy metals in soil-crop system of peri-urban agricultural soils of Nanning, South China
摘要
Abstract
A total of 150 pairs of concentrations of Hg、Cd、Cr、Cu、Ni、Pb and Zn in the soils、grains of rice、vegetable and corn were determined in peri-urban agricultural soils of Nanning.The results indicated the mean soil concentrations of Hg、Cd、Cr、Cu、Ni、Pb and Zn were 0.116、0.202、56.76、22.12、14.49、25.18、56.28ttg · g-1,respectively.The mean concetrations of six heavy metals in crops were 0.001 1、0.037、0.054、1.153、0.205、0.011 and 9.37 μg · g-1,respectively.Enrichment factor showed that Cd is mainly originated from human sorce;whereas Cr and Ni were controlled by natural sources.Transfer ability of Pb is lower than other metals while transfer ability of Znis higher than other metals.Transfer ability of As、Cd、Cr、Cu、Ni、Pb、Zn in soil-rice system was stronger than those in soil-vegetable and corn systems.Soil pH 、CaO、total organic matter、Fe2O3 、K2O and MgO were major factors influencing metal transfer from soil to crops,whereas soil K2O and MgO contents presented a negative effect on heavy metal mobility in leafed vegetable cultivation systems.关键词
农田土壤/重金属/元素迁移/农作物/南宁市Key words
agricultural soils/heavy metal/element migration/crop/Nanning City分类
资源环境引用本文复制引用
李杰,朱立新,康志强..南宁市郊周边农田土壤—农作物系统重金属元素迁移特征及其影响因素[J].中国岩溶,2018,37(1):43-52,10.基金项目
南宁市城市土地地下空间开发利用调查(桂国土资办[2014]71号) （桂国土资办[2014]71号）
桂湘鄂1∶25万土地质量地球化学调查(DD20160327) （DD20160327）
