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Effects of soil properties on the Cd threshold in typical paddy soils using BCR sequential extraction
Human and Ecological Risk Assessment ( IF 4.3 ) Pub Date : 2019-01-15 , DOI: 10.1080/10807039.2018.1490998
Qi Chen 1, 2 , Peiqin Peng 1, 2 , Hongbo Hou 1, 2 , Xianqing Ding 1, 2 , Jian Long 1, 2 , Xinyang Li 1, 2 , Bohan Liao 1, 2
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Soil quality standards used for agricultural land do not fully consider the effect of soil properties on cadmium (Cd) uptake by crops. A pot experiment with six types of soil derived from two typical soil parent materials was conducted to determine the effect of soil properties on the soil Cd fractions and Cd concentration in rice grain. The results of soil Cd fractions obtained by the Community Bureau of Reference sequential extraction revealed significant differences among soil types. Redundancy analysis showed that soil pH was the most influential factor affecting soil Cd fractions for red paddy soil, but soil pH, soil organic matter, and clay content were significant for purple paddy soil. Stepwise multiple linear regression analysis showed that soil clay and soil organic matter were the two most significant variables contributing to soil Cd threshold, explaining 97.8% of the variance. These results suggest that soil clay and organic matter contents should be considered when evaluating the risk of Cd in paddy soil.



中文翻译:

BCR连续萃取对典型稻田土壤性质对Cd阈值的影响

用于农业土地的土壤质量标准并未充分考虑土壤特性对农作物吸收镉(Cd)的影响。进行了一项盆栽实验,用两种典型的土壤母质材料衍生出六种土壤,以确定土壤性质对水稻籽粒中Cd含量和Cd浓度的影响。社区参考局顺序提取获得的土壤Cd分数的结果表明,土壤类型之间存在显着差异。冗余分析表明,土壤pH是影响红壤稻田土壤Cd含量的最主要因素,而紫色稻田土壤pH,土壤有机质和黏土含量是最重要的。逐步多元线性回归分析表明,土壤黏土和土壤有机质是影响土壤镉阈值的两个最显着变量,解释了97.8%的方差。这些结果表明,在评估稻田土壤中镉的风险时,应考虑土壤黏土和有机质含量。

更新日期:2019-01-15
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