title: Effect of organic matter amendment, arsenic amendment and water management regime on rice grain arsenic species.
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.
authors: Institute of Biological and Environmental Sciences, University of Aberdeen, Cruickshank Building, St. Machar Drive, Aberdeen AB24 3UU, UK. g.norton@abdn.ac.uk
authors: Gareth J
authors: GJ
authors: Norton
authors: Eureka E
authors: EE
authors: Adomako
authors: Claire M
authors: CM
authors: Deacon
authors: Anne-Marie
authors: AM
authors: Carey
authors: Adam H
authors: AH
authors: Price
authors: Andrew A
authors: AA
authors: Meharg
mesh_terms: D000383:Agriculture / Q000379:methods*; D001151:Arsenic / Q000032:analysis*; D003247:Conservation of Natural Resources; D004784:Environmental Monitoring; D052918:Environmental Restoration and Remediation / Q000379:methods*; D005506:Food Contamination / Q000032:analysis / Q000517:prevention & control; D012275:Oryza / Q000737:chemistry* / Q000254:growth & development; D012989:Soil Pollutants / Q000032:analysis; D014874:Water Pollutants, Chemical / Q000032:analysis*; D062066:Water Resources / Q000706:statistics & numerical data
chemical_list: D012989:Soil Pollutants; D014874:Water Pollutants, Chemical; D001151:Arsenic