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南宁市郊周边农田土壤-农作物系统重金属元素迁移特征及其影响因素

李 杰 朱立新 康志强

李 杰, 朱立新, 康志强. 南宁市郊周边农田土壤-农作物系统重金属元素迁移特征及其影响因素[J]. 中国岩溶, 2018, 37(1): 43-52. doi: 10.11932/karst2018y01
引用本文: 李 杰, 朱立新, 康志强. 南宁市郊周边农田土壤-农作物系统重金属元素迁移特征及其影响因素[J]. 中国岩溶, 2018, 37(1): 43-52. doi: 10.11932/karst2018y01
LI Jie, ZHU Lixin, KANG Zhiqiang. Characteristics of transfer and their influencing factors of heavy metals in soil-crop system of peri-urban agricultural soils of Nanning, South China[J]. CARSOLOGICA SINICA, 2018, 37(1): 43-52. doi: 10.11932/karst2018y01
Citation: LI Jie, ZHU Lixin, KANG Zhiqiang. Characteristics of transfer and their influencing factors of heavy metals in soil-crop system of peri-urban agricultural soils of Nanning, South China[J]. CARSOLOGICA SINICA, 2018, 37(1): 43-52. doi: 10.11932/karst2018y01

南宁市郊周边农田土壤-农作物系统重金属元素迁移特征及其影响因素

doi: 10.11932/karst2018y01
基金项目: 南宁市城市土地地下空间开发利用调查(桂国土资办〔2014〕71号);桂湘鄂1∶25万土地质量地球化学调查(DD20160327)

Characteristics of transfer and their influencing factors of heavy metals in soil-crop system of peri-urban agricultural soils of Nanning, South China

  • 摘要: 通过采集南宁市郊农田中玉米、蔬菜、水稻可食部分及其根系土150组,研究重金属元素在不同土壤-农作物系统中迁移特征及其影响因素,结果表明:根系土中Hg、Cd、Cr、Cu、Ni、Pb、Zn平均含量分别为0.116、0.202、56.76、22.12、14.49、25.18和56.28 mg·kg-1。农作物对应平均含量分别为0.001 1、0.037、0.054、1.153、0.205、0.011和9.37 mg·kg-1。根系土富集因子表明Cd受到不同程度人为活动影响,Cr和Ni主要受地质背景控制;不同作物系统元素富集因子表明Pb在土壤-农作物系统中迁移能力最低,Zn迁移能力最强。Cd、Cr、Cu、Ni、Pb和Zn在土壤-水稻系统重迁移能力显著高于蔬菜和玉米。根系土中pH、CaO、有机质、Fe2O3、K2O、MgO与重金生物富集系数呈显著性负相关,但在土壤-叶类蔬菜系统中根系土中K2O、MgO与Hg生物富集系数呈显著正相关。

     

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  • 发布日期:  2018-02-25

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