Predicting molybdenum toxicity to higher plants: Influence of soil properties

被引：65

作者：

McGrath, S. P. ^{[1
]}

Mico, C. ^{[1
]}

Curdy, R. ^{[2
]}

Zhao, F. J. ^{[1
]}

机构：

[1] Rothamsted Res, Ctr Soils & Ecosyst Funct, Dept Soil Sci, Harpenden AL5 2JQ, Herts, England

[2] Swiss Fed Inst Technol Lausanne EPFL, Lab Environm Biotechnol LBE, CH-1015 Lausanne, Switzerland

来源：

ENVIRONMENTAL POLLUTION | 2010年 / 158卷 / 10期

基金：

英国生物技术与生命科学研究理事会;

关键词：

Molybdate; Higher plants; Organic carbon; Amorphous iron oxides; Soil pH; Sulphate; AFFINITY MOLYBDATE TRANSPORTER; FORAGE CROPS; ADSORPTION; SULFUR; BIOAVAILABILITY; METALS; COPPER; RANGE; FIELD; NI;

D O I：

10.1016/j.envpol.2010.06.027

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The effect of soil properties on the toxicity of molybdenum (Mo) to four plant species was investigated. Soil organic carbon or ammonium-oxalate extractable Fe oxides were found to be the best predictors of the 50% effective dose (ED50) of Mo in different soils, explaining > 65% of the variance in ED50 for four species except for ryegrass (26-38%). Molybdenum concentrations in soil solution and consequently plant uptake were increased when soil pH was artificially raised because sorption of Mo to amorphous oxides is greatly reduced at high pH. The addition of sulphate significantly decreased Mo uptake by oilseed rape. For risk assessment, we suggest that Mo toxicity values for plants should be normalised using soil amorphous iron oxide concentrations. (c) 2010 Elsevier Ltd. All rights reserved.

引用

页码：3095 / 3102

页数：8

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