A comparison of the rhizosphere-based method with DTPA, EDTA, CaCl2, and NaNO3 extraction methods for prediction of bioavailability of metals in soil to barley

被引：257

作者：

Feng, MH ^{[1
]}

Shan, XQ ^{[1
]}

Zhang, SZ ^{[1
]}

Wen, B ^{[1
]}

机构：

[1] Chinese Acad Sci, Ecoenvironm Sci Res Ctr, State Key Lab Environm Chem & Ecotoxicol, Beijing 100085, Peoples R China

来源：

ENVIRONMENTAL POLLUTION | 2005年 / 137卷 / 02期

基金：

中国国家自然科学基金;

关键词：

bioavailability; rhizosphere-based method; moist rhizosphere soil; low-molecular-weight organic acids; heavy metals;

D O I：

10.1016/j.envpol.2005.02.003

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

A rhizosphere-based method was compared with DTPA. EDTA, CaCl2, and NaNO3 extraction methods for the evaluation of bioavailability of heavy metals in soil to barley. The extractable amounts of Cr, Cu, Zn and Cd analyzed by the rhizosphere-based method correlated significantly with the metal content of barley roots. The extractable metals identified by DTPA, EDTA, CaCl2 and NaNO3 methods exhibited relatively poor or no correlation with the metal content of barley roots. The stepwise multiple regression equation of the rhizosphere-based method was the simplest one, as no soil properties needed to be entered, whereas the equations for the DTPA, EDTA, CaCl2 and NaNO3 extraction methods always require those variables. The most distinct feature of the rhizosphere-based method was that the proposed method was suitable for acidic, neutral and near alkaline soils. In contrast, the other extraction methods were restricted to soil types. In summary, the rhizosphere-based method is the most robust approach for evaluation of bioavailability of metals in soil to barley. (C) 2005 Elsevier Ltd. All rights reserved.

引用

页码：231 / 240

页数：10

共 46 条

[1] The distribution and dynamics of chromium and nickel in cultivated and uncultivated semi-arid soils from Nigeria [J].