不同蔬菜对土壤Cd、Pb的累积能力研究  

Uptake and Accumulation of Cd and Pb in Different Vegetables from Soil

作　　者：刘恩玲[1] 王亮[1] 孙继[2] 潘琇[1] 

机构地区：[1]温州科技职业学院(温州市农科院)生态环境研究所,浙江温州325006 [2]温州科技职业学院(温州市农科院)蔬菜科学研究所,浙江温州325006

出　　处：《土壤通报》2011年第3期758-762,共5页Chinese Journal of Soil Science

基　　金：温州市科技局项目N2004B011资助

摘　　要：采用盆钵实验法,研究不同蔬菜对土壤Cd、Pb的吸收能力差异。结果表明蔬菜对土壤Cd、Pb吸收能力的种间差异十分显著。不同作物可食部分对镉的富集能力为:青菜>萝卜>莴苣>四季豆>黄瓜>番茄;不同作物可食部分对Pb的富集能力为:青菜>四季豆、萝卜>黄瓜>番茄、莴笋。作物的Cd、Pb吸收量与土壤浓度正相关;随着土壤含量的增加,青菜和萝卜的Cd、Pb累积系数显著提高,而黄瓜和四季豆的Pb累积系数则大幅降低;铅镉交互作用对作物的铅吸收无显著影响,但对镉吸收有显著影响,尤其是萝卜的Cd吸收量随土壤Pb的增加而明显降低。与其他作物相比,番茄Cd、Pb富集能力均较小,在轻度铅镉污染的农田中种植其食品安全的风险性较低。Heavy metal pollution in agricultural land becomes more and more serious in recent years.How to use the contaminated agricultural land in safe way becomes the most important and urgent thing.If we can evaluate the heavy metal adsorption charateristics of different vegetables correctly,we should reduce the harm which heavy metal does to human healthy efficiently.In this article,a pot experiment was conducted to study the interspecific differences of Cd and Pb accumulation of vegetables.The result showed the differences were significant.Cd content of edible part in different vegetables followed such order： Pakchoi（Brassica chinensis L.）〉 radish（Raphanus sativus L.） 〉lettuce（Lactuca sativa L.）〉 green bean（Phaseolus vulgaris L.） cucumber（Cucumis sativus L.） tomato（Solanum lycopersicum L.）.Pb content of edible part in different vegetables followed such order： Pakchoi〉 green bean and radish 〉cucumber〉 tomato and lettuce.With the increasing of Cd or Pb in soil,their content in vegetables increased.Both Cd and Pb accumulation coefficients of pakchoi and radish increased significantly,while Pb accumulation coefficients of cucumber and green bean decreased with the increasing of them in soil.Pb in soil markedly reduced Cd accumulation capacity of radish,while Pb accumulation was not significantly correlated with Cd.From the research,tomatoes can be planted in slight Cd and Pb pollution soil with low food safety risk.

关 键 词：蔬菜 食用部位 镉 铅 累积 种间差异 

分 类 号：X503.231[环境科学与工程—环境工程]