SisAgriV1, PubMed, Corpus, bibRecord, 000103

Contamination and spatial variation of heavy metals in the soil-rice system in Nanxun County, Southeastern China.

Identifieur interne : 000103 ( PubMed/Corpus ); précédent : 000102; suivant : 000104

Contamination and spatial variation of heavy metals in the soil-rice system in Nanxun County, Southeastern China.

Auteurs : Keli Zhao ; Weijun Fu ; Zhengqian Ye ; Chaosheng Zhang

Source :

International journal of environmental research and public health [ 1660-4601 ] ; 2015.

RBID : pubmed:25635917

English descriptors

KwdEn :
- Agriculture, China, Environmental Monitoring, Food Contamination (analysis), Metals, Heavy (analysis), Oryza (chemistry), Soil (chemistry), Soil Pollutants (analysis), Spatial Analysis.
MESH :
- chemical , analysis : Metals, Heavy, Soil Pollutants.
- chemical , chemistry : Soil.
- geographic : China.
- analysis : Food Contamination.
- chemistry : Oryza.
- Agriculture, Environmental Monitoring, Spatial Analysis.

Abstract

There is an increasing concern about heavy metal contamination in farmland in China and worldwide. In order to reveal the spatial features of heavy metals in the soil-rice system, soil and rice samples were collected from Nanxun, Southeastern China. Compared with the guideline values, elevated concentrations of heavy metals in soils were observed, while heavy metals in rice still remained at a safe level. Heavy metals in soils and rice had moderate to strong spatial dependence (nugget/sill ratios: 13.2% to 49.9%). The spatial distribution of copper (Cu), nickel (Ni), lead (Pb) and zinc (Zn) in soils illustrated that their high concentrations were located in the southeast part. The high concentrations of cadmium (Cd) in soils were observed in the northeast part. The accumulation of all the studied metals is related to the long-term application of agrochemicals and industrial activities. Heavy metals in rice showed different spatial distribution patterns. Cross-correlograms were produced to quantitatively determine the spatial correlation between soil properties and heavy metals composition in rice. The pH and soil organic matter had significant spatial correlations with the concentration of heavy metals in rice. Most of the selected variables had clear spatial correlation ranges for heavy metals in rice, which could be further applied to divide agricultural management zones.

DOI: 10.3390/ijerph120201577
PubMed: 25635917

Links to Exploration step

pubmed:25635917

Le document en format XML

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<author><name sortKey="Fu, Weijun" sort="Fu, Weijun" uniqKey="Fu W" first="Weijun" last="Fu">Weijun Fu</name>
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<front><div type="abstract" xml:lang="en">There is an increasing concern about heavy metal contamination in farmland in China and worldwide. In order to reveal the spatial features of heavy metals in the soil-rice system, soil and rice samples were collected from Nanxun, Southeastern China. Compared with the guideline values, elevated concentrations of heavy metals in soils were observed, while heavy metals in rice still remained at a safe level. Heavy metals in soils and rice had moderate to strong spatial dependence (nugget/sill ratios: 13.2% to 49.9%). The spatial distribution of copper (Cu), nickel (Ni), lead (Pb) and zinc (Zn) in soils illustrated that their high concentrations were located in the southeast part. The high concentrations of cadmium (Cd) in soils were observed in the northeast part. The accumulation of all the studied metals is related to the long-term application of agrochemicals and industrial activities. Heavy metals in rice showed different spatial distribution patterns. Cross-correlograms were produced to quantitatively determine the spatial correlation between soil properties and heavy metals composition in rice. The pH and soil organic matter had significant spatial correlations with the concentration of heavy metals in rice. Most of the selected variables had clear spatial correlation ranges for heavy metals in rice, which could be further applied to divide agricultural management zones.</div>
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<CommentsCorrections RefType="Cites"><RefSource>J Environ Sci Health A Tox Hazard Subst Environ Eng. 2003 May;38(5):823-38</RefSource>
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Système d'information stratégique et agriculture (serveur d'exploration)

Contamination and spatial variation of heavy metals in the soil-rice system in Nanxun County, Southeastern China.

Contamination and spatial variation of heavy metals in the soil-rice system in Nanxun County, Southeastern China.

Source :

English descriptors

Abstract

Links to Exploration step

Le document en format XML

Pour manipuler ce document sous Unix (Dilib)

Pour mettre un lien sur cette page dans le réseau Wicri

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