蔬菜地土壤有效态重金属提取方法的比较  

Methods for Extraction of Available Heavy Metals in Soils of Vegetable Fields.

作　　者：顾国平 章明奎[2] 

机构地区：[1]绍兴市农业科学研究院,浙江绍兴312003 [2]浙江大学环境与资源学院资源科学系,浙江杭州310029

出　　处：《生态与农村环境学报》2006年第4期67-70,共4页Journal of Ecology and Rural Environment

基　　金：国家重点基础研究发展规划项目(2005CB121104)

摘　　要：实地采集土壤进行盆栽试验,研究用5种提取剂提取的土壤有效态重金属含量与大白菜吸收量间的关系。结果表明,采用化学提取方法测得的可提取态重金属含量比重金属总量更能有效预测大白菜吸收的重金属量,并以CaC l2和NH4OAc 2种提取剂最为有效。将土壤重金属总量与pH值2项指标结合起来考虑可较好地预测大白菜对土壤重金属的吸收。Accumulation of heavy metals in soils of vegetable fields poses a potential risk to vegetable production, which is related to availability of the heavy metals in the soil. A pot experiment was conducted to evaluate relationships between uptake of the heavy metals by vegetable （Chinese cabbage） and concentrations of the soil available heavy metals that could be extracted by five different methods. Results show that contents of the extractable heavy metals determined with the chemical method could be used more effectively to predict uptake of heavy metals by the vegetables. Solutions of 0.01 mol · L^-1 CaCl2 and 1 mol · L^-1 NH4OAc are the most efficient extractants that can be used in predicting heavy metal concentrations in vegetables. If pH value of the soil is also taken into account, prediction of uptake of heavy metals by Chinese cabbage would be more efficient.

关 键 词：蔬菜地 土壤 重金属 生物有效性 评价 

分 类 号：X8[环境科学与工程—环境工程] X53