重庆市蔬菜区重金属污染现状 |
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引用本文: | 李其林,刘光德,魏朝富,黄昀.重庆市蔬菜区重金属污染现状[J].土壤通报,2005,36(1):104-107. |
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作者姓名: | 李其林 刘光德 魏朝富 黄昀 |
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作者单位: | 1. 重庆市农业环境保护监测站,重庆,400020 2. 西南农业大学,重庆,400716 |
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基金项目: | 重庆市无公害蔬菜行动计划部分内容(编号:2000-16) |
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摘 要: | 本文通过对不同区域菜地大气污染物和灌溉水、土壤、蔬菜重金属平均含量比较发现,污染区大气污染物均大于清洁区;灌溉水和土壤重金属在不同区域差异不大;不同蔬菜品种重金属在不同区域表现不一致,叶菜类基本表现为污染区大于清洁区,说明叶菜类蔬菜重金属污染主要由大气污染引起。苋菜、莴笋重金属含量较高,说明富集重金属能力较强。蔬菜重金属含量同食品卫生限量标准比较表明超标蔬菜品种为苋菜、莴笋、葱子,超标重金属为Pb、Cd、Cr。同一蔬菜品种莴笋重金属Pb、Cd、Hg、As平均含量在污染点的下风向高于上风向,说明Pb、Cd、Hg、As与大气污染有直接关系。蔬菜重金属相关性分析表明Cr、Hg具有明显的协同和拮抗作用。
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关 键 词: | 污染 重金属 蔬菜区 |
文章编号: | 0564-3945(2005)01-0104-04 |
修稿时间: | 2003年9月24日 |
Heavy Metals in Vegetable-planting Areas in Chongqing |
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Abstract: | We found that the average contents of air pollutant were higher in polluted areas than in unpolluted areas, but the average contents of the heavy metals in irrigation water and soils were not signiticanty different in the two areas. The contents of heavy metals in leave - type vegetable were higher in the polluted areas than in unpolluted areas. The contents of heavy metals of three - coloured amaranth and asparagus lettuce are big, and that demonstrate the capability of collecting heavy metals is very strong. The contents of heavy metals in the vegetables exceed the food standards. |
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Keywords: | Pollution Heavy metals Vegetable area |
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