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Environ Pollut. 2014 May;188:159-65. doi: 10.1016/j.envpol.2014.02.014. Epub 2014 Mar 2.

Evaluation of potential effects of soil available phosphorus on soil arsenic availability and paddy rice inorganic arsenic content.

Author information

1
School of Earth Sciences and Resources, China University of Geosciences, Beijing 100083, China. Electronic address: jianwezc@gmail.com.
2
School of Earth Sciences and Resources, China University of Geosciences, Beijing 100083, China.
3
General Academy of Geological Survey of Guangxi, Nanning 530023, China.

Abstract

The transfer of arsenic from paddy field to rice is a major exposure route of the highly toxic element to humans. The aim of our study is to explore the effects of soil available phosphorus on As uptake by rice, and identify the effects of soil properties on arsenic transfer from soil to rice under actual field conditions. 56 pairs of topsoil and rice samples were collected. The relevant parameters in soil and the inorganic arsenic in rice grains were analyzed, and then all the results were treated by statistical methods. Results show that the main factors influencing the uptake by rice grain include soil pH and available phosphorus. The eventual impact of phosphorus is identified as the suppression of As uptake by rice grains. The competition for transporters from soil to roots between arsenic and phosphorus in rhizosphere soil has been a dominant feature.

KEYWORDS:

Arsenic; Available phosphorus; Environmental geochemistry; Rice

PMID:
24598788
DOI:
10.1016/j.envpol.2014.02.014
[Indexed for MEDLINE]

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