有机质
土壤水分
化学
环境化学
土壤pH值
土壤有机质
稻草
金属
农学
土工试验
土壤科学
环境科学
生物
无机化学
有机化学
作者
Fanrong Zeng,Shafaqat Ali,Haitao Zhang,Yang Ouyang,Boyin Qiu,Feibo Wu,Guoping Zhang
标识
DOI:10.1016/j.envpol.2010.09.019
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.
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