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Effects of different forms of nitrogen fertilizers on arsenic uptake by rice plants
Chen, Xue-Ping; Zhu, Yong-Guan; Hong, Mi-Na; Kappler, Andreas; Xu, Yu-Xin
2008-04
Source PublicationENVIRONMENTAL TOXICOLOGY AND CHEMISTRY
Volume27Issue:4Pages:881-887
AbstractA pot microcosm experiment was conducted to investigate the effect of different forms of N fertilizers on As uptake by rice. Compared to a nontreated control, addition of nitrate reduced Fe(II) concentration in soil solution, while treatment with ammonium enhanced Fe(Ill) reduction, probably coupled to NH(4)(+) oxidation in the nonrhizosphere. Most-probable-number (MPN) enumerations revealed high densities of nitrate-dependent Fe(II)-oxidizing microorganisms. The addition of nitrate decreased Fe plaque formation on the root surface, accompanied by much lower dissolved Fe(II) concentrations in the rhizosphere soil solution compared to the nonamended control. Nitrate addition also reduced As uptake by the rice plant. These results suggest that nitrate may inhibit Fe(III) reduction and/or stimulate nitrate-dependent Fe(II) oxidation, leading to As coprecipitation with, or adsorption to, Fe(III) minerals in the soil. Although Fe plaque formation on the root surface is reduced, nitrate-dependent stimulation of Fe(II) oxidation and/or inhibition of Fe(III) reduction in the bulk soil sequesters mobile As in the soil, resulting in reduced As uptake by rice.
Department土壤环境科学实验室
KeywordNitrate-dependent Iron Oxidation Iron Plaque Most Probable Number Arsenic Paddy Soil
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Document Type期刊论文
Identifierhttps://ir.rcees.ac.cn/handle/311016/22322
Collection土壤环境科学实验室
Recommended Citation
GB/T 7714
Chen, Xue-Ping,Zhu, Yong-Guan,Hong, Mi-Na,et al. Effects of different forms of nitrogen fertilizers on arsenic uptake by rice plants[J]. ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY,2008,27(4):881-887.
APA Chen, Xue-Ping,Zhu, Yong-Guan,Hong, Mi-Na,Kappler, Andreas,&Xu, Yu-Xin.(2008).Effects of different forms of nitrogen fertilizers on arsenic uptake by rice plants.ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY,27(4),881-887.
MLA Chen, Xue-Ping,et al."Effects of different forms of nitrogen fertilizers on arsenic uptake by rice plants".ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY 27.4(2008):881-887.
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