广西靖西县田七种植区土壤重金属的调查与分析

广西靖西县被誉为"田七之乡",为确保田七的生态安全,保证田七的药用价值和药材质量,对靖西县田七种植区土壤5种重金属(As、Hg、Cr、Pb、Cd)污染状况进行调查分析,为靖西县田七的安全控制提供理论参考。通过野外调查和室内分析相结合的方法,分析了靖西县9个不同的种植区土壤中5种重金属的含量。所调查的田七种植区3个乡9个村土壤重金属污染情况有一定的差异,与国家土壤质量标准(GB15608-1995)对照分析,所调查的靖西县的新甲乡、武平乡、化垌乡种植田七的土壤重金属As、Pb、Hg未超过国家GB15618-1995(土壤环境质量标准)的二级标准,而所调查的靖西县田七种植区Cr、Cd超标率分别为66.7%和33.3%,总体上化垌乡的重金属含量较高,武平乡最低。

Investigation and Analysis of Heavy Metals in the Soils of Panax Growing Areas in Jingxi County of Guangxi Province

Jingxi County of Guangxi Province is called "the pseudo-ginseng town".In order to ensure the ecological safety of Panax notoginseng and guarantee the medicinal value and quality of Panax notoginseng,pollution status of 5 heavy metals(As,Hg,Cr,Pb and Cd) in the soils of Panax notoginseng cultivation areas in Jingxi County is investigated and analyzed,providing theoretical reference for safe control of Panax notoginseng in Jingxi County.Through field investigation and laboratory analysis,the content of 5 heavy metals in the soils of 9 different growing regions in Jingxi County is analyzed.The results show that with regard to the heavy metal pollution in soils,there are certain differences among the nine villages of 3 towns.In comparison with the Environmental Quality Standard for Soils (GB15608-1995),the content of As,Pb and Hg in the soils of Panax Notoginseng growth areas of Xinjia Town,Wuping Town and Huadong Town is found within level Ⅱ of the national standard.The overstandard rate of Cr and Cd in the growing areas is 66.7％ and 33.3％.Generally,the content of heavy metals in Huadong Town is the highest and that in Wuping Town is the lowest.