Reducing arsenic accumulation in rice grain through iron oxide amendment

Effects of soil-arsenic (As), phosphorus and iron oxide on As accumulation in rice grain were investigated. Cultivars that have significantly different sensitivity to As, straighthead-resistant Zhe 733 and straighthead-susceptible Cocodrie, were used to represent different cultivar varieties. The gr...

Full description

Saved in:
Bibliographic Details
Published in:Ecotoxicology and environmental safety 2015-08, Vol.118, p.55-61
Main Authors: Farrow, Eric M., Wang, Jianmin, Burken, Joel G., Shi, Honglan, Yan, Wengui, Yang, John, Hua, Bin, Deng, Baolin
Format: Article
Language:English
Subjects:
Arsenic
Arsenic - metabolism
Ferric Compounds - administration & dosage
Ferric Compounds - metabolism
Fertilizers - analysis
Grain accumulation
Iron oxide
Metals - metabolism
Oryza - drug effects
Oryza - metabolism
Phosphates - administration & dosage
Phosphates - metabolism
Rice cultivar
Seeds - drug effects
Seeds - metabolism
Selenium - metabolism
Soil
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Effects of soil-arsenic (As), phosphorus and iron oxide on As accumulation in rice grain were investigated. Cultivars that have significantly different sensitivity to As, straighthead-resistant Zhe 733 and straighthead-susceptible Cocodrie, were used to represent different cultivar varieties. The grain accumulation of other elements of concern, selenium (Se), molybdenum (Mo), and cadmium (Cd) was also monitored. Results demonstrated that high soil-As not only resulted in high grain-As, but could also result in high grain-Se, and Zhe 733 had significantly less grain-As than Cocodrie did. However, soil-As did not impact grain-Mo and Cd. Among all elements monitored, iron oxide amendment significantly reduced grain-As for both cultivars, while the phosphate application only reduced grain-Se for Zhe 733. Results also indicated that cultivar type significantly impacted grain accumulation of all monitored trace elements. Therefore, applying iron oxide to As-contaminated land, in addition to choosing appropriate rice cultivar, can effectively reduce the grain accumulation of As. [Display omitted] •High soil-As results in not only high grain-As but also high grain-Se in rice.•Iron oxide amendment significantly reduces grain-As.•Cultivar type significantly impacts grain accumulation of As, Se, Mo, and Cd.
ISSN:0147-6513
1090-2414
DOI:10.1016/j.ecoenv.2015.04.014