The influence of pH and organic matter content in paddy soil on heavy metal availability and their uptake by rice plants

文献类型: 外文期刊

第一作者: Ouyang, Younan

作者: Ouyang, Younan;Zhang, Guoping;Zeng, Fanrong;Ali, Shafaqat;Zhang, Haitao;Qiu, Boyin;Wu, Feibo

作者机构:

关键词: availability;heavy metal;organic matter;rice;soil pH

期刊名称:ENVIRONMENTAL POLLUTION ( 影响因子:8.071; 五年影响因子:8.35 )

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年卷期:

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收录情况: SCI

摘要: The experiments were done to investigate the effect of soil pH and organic matter content on EDTA-extractable heavy metal contents in soils and heavy metal concentrations in rice straw and grains. EDTA-extractable Cr contents in soils and concentrations in rice tissues were negatively correlated with soil pH, but positively correlated with organic matter content. The combination of soil pH and organic matter content would produce the more precise regression models for estimation of EDTA-Cu, Pb and Zn contents in soils, demonstrating the distinct effect of the two factors on the availability of these heavy metals in soils. Soil pH greatly affected heavy metal concentrations in rice plants. Furthermore, inclusion of other soil properties in the stepwise regression analysis improved the regression models for predicting straw Fe and grain Zn concentrations, indicating that other soil properties should be taken into consideration for precise predicting of heavy metal concentrations in rice plants.

分类号: X5

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