Effect of organic fertilization practiced in paddy soils in Bangladesh on arsenic dynamics

M. Hossain, A. Mestrot, G. J. Norton, C. M. Deacon, A. A. Meharg, M. Hossain

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

A greenhouse rice growth trial was conducted to find the effect of Farm Yard Manure (FYM) and rice straw, at a field application rate practiced in Bangladesh (5 t/ha), on arsenic (As) mobilization in soil. Organic Matter (OM) amendments lead to considerable mobilization of As into both soil porewaters and standing surface waters. Greatly enhanced As mobilization in porewater was observed initially (<24 d), but As mobilization decreased during later rice growth, particularly at grain fill. Total soil As was 12.7 ± 0.2 mg/kg and the highest As mobilization in porewater after 10 d following transplanting was found to be 0.73 ± 0.1 and 0.85 ± 0.2 mg/L with and without OM amendment, respectively. At 108 d, As concentration reduced to 0.05 ± 0.01 and 0.04 ± 0.01 mg/L with and without OM amendment, respectively. OM fertilization greatly enhanced As mobility to surface waters, which may have major implications for fate of As in paddy agronomic ecosystems.

Original languageEnglish
Title of host publicationUnderstanding the Geological and Medical Interface of Arsenic, As 2012 - 4th International Congress
Subtitle of host publicationArsenic in the Environment
Pages106-107
Number of pages2
Publication statusPublished - 16 Aug 2012
Event4th International Congress on Arsenic in the Environment, As 2012 - Cairns, QLD, Australia
Duration: 22 Jul 201227 Jul 2012

Conference

Conference4th International Congress on Arsenic in the Environment, As 2012
CountryAustralia
CityCairns, QLD
Period22/07/1227/07/12

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  • Cite this

    Hossain, M., Mestrot, A., Norton, G. J., Deacon, C. M., Meharg, A. A., & Hossain, M. (2012). Effect of organic fertilization practiced in paddy soils in Bangladesh on arsenic dynamics. In Understanding the Geological and Medical Interface of Arsenic, As 2012 - 4th International Congress: Arsenic in the Environment (pp. 106-107)