| 水分调控和钝化剂处理对水稻土镉的钝化效应及其机理 |
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| 引用本文： | 李剑睿,徐应明,林大松,梁学峰,孙国红,孙约兵.水分调控和钝化剂处理对水稻土镉的钝化效应及其机理[J].农业环境科学学报,2014,33(7):1316-1321. |
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| 作者姓名： | 李剑睿 徐应明 林大松 梁学峰 孙国红 孙约兵 |
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| 作者单位： | 农业部环境保护科研监测所污染防治研究室， 天津 300191；中国农业科学院农田重金属污染修复创新团队， 天津 300191;农业部环境保护科研监测所污染防治研究室， 天津 300191；中国农业科学院农田重金属污染修复创新团队， 天津 300191;农业部环境保护科研监测所污染防治研究室， 天津 300191；中国农业科学院农田重金属污染修复创新团队， 天津 300191;农业部环境保护科研监测所污染防治研究室， 天津 300191；中国农业科学院农田重金属污染修复创新团队， 天津 300191;天津农学院技术学院， 天津 300384;农业部环境保护科研监测所污染防治研究室， 天津 300191；中国农业科学院农田重金属污染修复创新团队， 天津 300191 |
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| 摘 要： | 采用盆栽试验,研究了水分管理和钝化剂处理对红壤性水稻土重金属镉的钝化效应及其作用机理。结果表明,在土壤镉含量为0.75 mg·kg-1下,添加海泡石复配磷肥可以显著提高土壤pH值,长期淹水、常规管理水分条件下,土壤交换态Cd分别降低了20.4%和15.7%,碳酸盐结合态Cd分别下降了15.5%和14.1%,糙米Cd分别降低了52.3%和46.0%。未添加钝化剂条件下,长期淹水处理的根表Fe(Ⅱ)含量比常规处理增加了1.2倍,根表Cd含量则是常规处理的82.6%。土壤经钝化处理后,长期淹水和常规管理水分条件下,根表Fe(Ⅱ)分别增加了40.1%和70.0%,而根表Cd分别降低了35.3%和42.4%。糙米Cd含量与根表Fe(Ⅱ)含量呈显著负相关,与根表Cd含量呈显著正相关。土壤Fe2+和Cd2+对水稻根表吸附点位的竞争以及土壤镉较低的生物有效性是钝化处理组糙米镉含量下降的主要原因。
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| 关 键 词： | 长期淹水 常规管理 土壤 镉 钝化修复 |
Immobilization of Cadmium in a Paddy Soil Using Moisture Management and Amendments |
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| LI Jian-rui,XU Ying-ming,LIN Da-song,LIANG Xue-feng,SUN Guo-hong and SUN Yue-bing.Immobilization of Cadmium in a Paddy Soil Using Moisture Management and Amendments[J].Journal of Agro-Environment Science( J. Agro-Environ. Sci.),2014,33(7):1316-1321. |
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| Authors: | LI Jian-rui XU Ying-ming LIN Da-song LIANG Xue-feng SUN Guo-hong and SUN Yue-bing |
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| Institution: | Department of Pollution Control, Ago-Environmental Protection Institute of Ministry of Agriculture, Tianjin 300191, China;Innovative Team of Heavy Metal Contaminated Farmland of Chinese Academy of Agricultural Sciences, Tianjin 300191, China;Department of Pollution Control, Ago-Environmental Protection Institute of Ministry of Agriculture, Tianjin 300191, China;Innovative Team of Heavy Metal Contaminated Farmland of Chinese Academy of Agricultural Sciences, Tianjin 300191, China;Department of Pollution Control, Ago-Environmental Protection Institute of Ministry of Agriculture, Tianjin 300191, China;Innovative Team of Heavy Metal Contaminated Farmland of Chinese Academy of Agricultural Sciences, Tianjin 300191, China;Department of Pollution Control, Ago-Environmental Protection Institute of Ministry of Agriculture, Tianjin 300191, China;Innovative Team of Heavy Metal Contaminated Farmland of Chinese Academy of Agricultural Sciences, Tianjin 300191, China;College of Technology, Tianjin Agricultural University, Tianjin 300384, China;Department of Pollution Control, Ago-Environmental Protection Institute of Ministry of Agriculture, Tianjin 300191, China;Innovative Team of Heavy Metal Contaminated Farmland of Chinese Academy of Agricultural Sciences, Tianjin 300191, China |
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| Abstract: | |
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| Keywords: | continuous flooding conventional irrigation paddy soil Cd immobilization remediation |
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