Climatic control of major and trace elements in paddy soils from wet and dry regions of Sri Lanka

Rice cultivation is a widespread agricultural practice in the dry and wet climatic zones of Sri Lanka. Due to the excessive application of agrochemicals, paddy soils are considered to be polluted, particularly with toxic trace elements. To assess the major and trace element levels in rice paddy soil...

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Autores principales:	R.T. Rubasinghe, S.K. Gunatilake, Rohana Chandrajith
Formato:	article
Lenguaje:	EN
Publicado:	Elsevier 2021
Materias:	Geo-accumulation index Trace elements Fertilizer application Bioavailability factor Exchangeable fraction Environmental sciences GE1-350
Acceso en línea:	https://doaj.org/article/861aebe278d045ec8cdd40ff9bb26de4
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spelling	oai:doaj.org-article:861aebe278d045ec8cdd40ff9bb26de42021-11-14T04:36:07ZClimatic control of major and trace elements in paddy soils from wet and dry regions of Sri Lanka2667-010010.1016/j.envc.2021.100361https://doaj.org/article/861aebe278d045ec8cdd40ff9bb26de42021-12-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S2667010021003358https://doaj.org/toc/2667-0100Rice cultivation is a widespread agricultural practice in the dry and wet climatic zones of Sri Lanka. Due to the excessive application of agrochemicals, paddy soils are considered to be polluted, particularly with toxic trace elements. To assess the major and trace element levels in rice paddy soils, 97 samples were collected from the main two climatic regions of Sri Lanka. Total and exchangeable contents of 12 major and trace elements, i.e., Na, K, Ca Mg, Fe, Mn, Cr, Ni, Zn, Pb, Cu, and As were analyzed. Geo-accumulation index and Potential Bioavailability Factor (PBF) was employed to assess the levels of contaminations and results were statistically compared. Paddy soils from both climatic zones contained over 5.0 mg/kg of available–P, which is almost equal to the optimum levels required for rice plants. The total content of trace metals varied in the order Fe>Mn>Zn>Cu>Ni>As in both dry and wet zones, while major elements increased in the order Mg>K>Na. Geo Accumulation indices (Igeo) showed that almost all soils were uncontaminated to moderately contaminated with trace elements.R.T. RubasingheS.K. GunatilakeRohana ChandrajithElsevierarticleGeo-accumulation indexTrace elementsFertilizer applicationBioavailability factorExchangeable fractionEnvironmental sciencesGE1-350ENEnvironmental Challenges, Vol 5, Iss , Pp 100361- (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Geo-accumulation index Trace elements Fertilizer application Bioavailability factor Exchangeable fraction Environmental sciences GE1-350
spellingShingle	Geo-accumulation index Trace elements Fertilizer application Bioavailability factor Exchangeable fraction Environmental sciences GE1-350 R.T. Rubasinghe S.K. Gunatilake Rohana Chandrajith Climatic control of major and trace elements in paddy soils from wet and dry regions of Sri Lanka
description	Rice cultivation is a widespread agricultural practice in the dry and wet climatic zones of Sri Lanka. Due to the excessive application of agrochemicals, paddy soils are considered to be polluted, particularly with toxic trace elements. To assess the major and trace element levels in rice paddy soils, 97 samples were collected from the main two climatic regions of Sri Lanka. Total and exchangeable contents of 12 major and trace elements, i.e., Na, K, Ca Mg, Fe, Mn, Cr, Ni, Zn, Pb, Cu, and As were analyzed. Geo-accumulation index and Potential Bioavailability Factor (PBF) was employed to assess the levels of contaminations and results were statistically compared. Paddy soils from both climatic zones contained over 5.0 mg/kg of available–P, which is almost equal to the optimum levels required for rice plants. The total content of trace metals varied in the order Fe>Mn>Zn>Cu>Ni>As in both dry and wet zones, while major elements increased in the order Mg>K>Na. Geo Accumulation indices (Igeo) showed that almost all soils were uncontaminated to moderately contaminated with trace elements.
format	article
author	R.T. Rubasinghe S.K. Gunatilake Rohana Chandrajith
author_facet	R.T. Rubasinghe S.K. Gunatilake Rohana Chandrajith
author_sort	R.T. Rubasinghe
title	Climatic control of major and trace elements in paddy soils from wet and dry regions of Sri Lanka
title_short	Climatic control of major and trace elements in paddy soils from wet and dry regions of Sri Lanka
title_full	Climatic control of major and trace elements in paddy soils from wet and dry regions of Sri Lanka
title_fullStr	Climatic control of major and trace elements in paddy soils from wet and dry regions of Sri Lanka
title_full_unstemmed	Climatic control of major and trace elements in paddy soils from wet and dry regions of Sri Lanka
title_sort	climatic control of major and trace elements in paddy soils from wet and dry regions of sri lanka
publisher	Elsevier
publishDate	2021
url	https://doaj.org/article/861aebe278d045ec8cdd40ff9bb26de4
work_keys_str_mv	AT rtrubasinghe climaticcontrolofmajorandtraceelementsinpaddysoilsfromwetanddryregionsofsrilanka AT skgunatilake climaticcontrolofmajorandtraceelementsinpaddysoilsfromwetanddryregionsofsrilanka AT rohanachandrajith climaticcontrolofmajorandtraceelementsinpaddysoilsfromwetanddryregionsofsrilanka
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Climatic control of major and trace elements in paddy soils from wet and dry regions of Sri Lanka

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