蔬菜对重金属生物富集程度的初步研究

Primary Study of Biological Accumulation to Heavy Metals in Vegetables

在农区随机采集蔬菜样品及相应土壤,测定其重金属含量及土壤pH,分析各种蔬菜对重金属的生物富集程度。结果表明,各种蔬菜对不同重金属的生物富集程度有较大差异,叶菜类蔬菜总体富集程度较高;重金属中,各种蔬菜对镉(Cd)的生物富集程度均较高;土壤pH与叶菜类蔬菜对Cd的生物富集程度呈显著负相关。

The vegetable products and their corresponding soil were sampled in rural area. The heavy metal＇s contents of all samples and soil pH were tested. The results showed that, there were great differences on biological accumulation to heavy metal among vegetable species. The biological accumulation to heavy metal in leafy vegetables were higher as compared to other type vegetables. The concentrations of Cd in leafy vegetables were higher than other heavy metals. The concentrations of Cd in leafy vegetables had significant negative correlation to soil pH.