Effect of organic matter amendment, arsenic amendment and water management regime on rice grain arsenic species

Gareth J. Norton*, Eureka E. Adomako, Claire M. Deacon, Anne Marie Carey, Adam H. Price, Andrew A. Meharg

*Corresponding author for this work

Research output: Contribution to journalArticle

48 Citations (Scopus)

Abstract

Arsenic accumulation in rice grain has been identified as a major problem in some regions of Asia. A study was conducted to investigate the effect of increased organic matter in the soil on the release of arsenic into soil pore water and accumulation of arsenic species within rice grain. It was observed that high concentrations of soil arsenic and organic matter caused a reduction in plant growth and delayed flowering time. Total grain arsenic accumulation was higher in the plants grown in high soil arsenic in combination with high organic matter, with an increase in the percentage of organic arsenic species observed. The results indicate that the application of organic matter should be done with caution in paddy soils which have high soil arsenic, as this may lead to an increase in accumulation of arsenic within rice grains. Results also confirm that flooding conditions substantially increase grain arsenic. © 2013 Elsevier Ltd. All rights reserved.

Original languageEnglish
Pages (from-to)38-47
Number of pages10
JournalEnvironmental Pollution
Volume177
Early online date6 Mar 2013
DOIs
Publication statusPublished - Jun 2013

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Keywords

  • arsenic
  • organic matter
  • pore water
  • water management
  • arsenic amendment

ASJC Scopus subject areas

  • Pollution
  • Health, Toxicology and Mutagenesis
  • Toxicology

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