垫江牡丹主产区土壤重金属含量的分析与评价

采用环境调查的方法研究垫江牡丹主产区土壤6种重金属含量状况，依据相关标准，应用单项污染指数法和综合污染指数法进行评价，以便为牡丹GAP基地的建设提供科学参考．结果表明：该区土壤的各种污染物的单项污染指数均小于1，表明土壤无超标污染物；该区5．3％的土壤污染物综合污染指数大于0．7，小于1，处于警戒级．其余94．7％的综合污染指数均小于0．7，表明土壤质量良好，为清洁水平，符合绿色药材栽培的环境质量要求．

Analysis and evaluation of soil environment quality of peony in Dianjiang county of Chongqing

Methods of environmental investigation were adopted to study 6 kind of heavy metals in the chief soils of peony in Dianjiang county of Chongqing and provide a basis for the GAP base establishment. According to relevant standards, it was evaluated by means of single pollution index and synthetic pollution indices. The result of the research indicated that the single pollution index of all sorts of pollution in the soil was less than 1, showing that soil is not overweight pollutant. The 5.3 % synthetic pollution indices of all sorts of pollution in the soil are greater than O. 7 and smaller than 1, in the alert level, the rest of the 94.7 % comprehensive pollution index are all smaller than O. 7, showing that soil quality is good, reaching the ＂clean＂ and ＂safe＂ levels. The soil environment quality meets the requirement of the organic drug culture environment.