重庆岩溶地质高背景区土壤-农作物系统重金属累积特征及影响因素
P595%X142; 为了揭示重庆岩溶地质高背景区土壤-农作物系统中重金属的迁移累积特征,选择在重庆市南部典型岩溶区,系统地采集大宗农作物(水稻、玉米和红薯)及其耕层土壤84组,分析测定农作物及耕层土壤中重金属砷(As)、镉(Cd)、铬(Cr)、铜(Cu)、汞(Hg)、镍(Ni)、锌(Zn)含量及理化性质,采用地统计、生物富集因子及皮尔逊相关系数分析等方法,开展重金属元素在重庆岩溶地质高背景地区土壤-农作物系统中累积特征及影响因素.结果表明,研究区水稻田、玉米地和红薯地耕层土壤重金属平均含量均高于重庆市和全国表层土壤背景值,呈现不同程度的积累,其中Cd元素富集现象较为突出.依据GB 15618...
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| Published in | 中国岩溶 Vol. 42; no. 1; pp. 71 - 83 |
|---|---|
| Main Authors | , , , , , , , |
| Format | Journal Article |
| Language | Chinese |
| Published |
重庆土地质量地质调查重点实验室,重庆市地质矿产勘查开发局川东南地质大队,重庆400038
01.02.2023
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| Subjects | |
| Online Access | Get full text |
| ISSN | 1001-4810 |
| DOI | 10.11932/karst20230106 |
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| Abstract | P595%X142; 为了揭示重庆岩溶地质高背景区土壤-农作物系统中重金属的迁移累积特征,选择在重庆市南部典型岩溶区,系统地采集大宗农作物(水稻、玉米和红薯)及其耕层土壤84组,分析测定农作物及耕层土壤中重金属砷(As)、镉(Cd)、铬(Cr)、铜(Cu)、汞(Hg)、镍(Ni)、锌(Zn)含量及理化性质,采用地统计、生物富集因子及皮尔逊相关系数分析等方法,开展重金属元素在重庆岩溶地质高背景地区土壤-农作物系统中累积特征及影响因素.结果表明,研究区水稻田、玉米地和红薯地耕层土壤重金属平均含量均高于重庆市和全国表层土壤背景值,呈现不同程度的积累,其中Cd元素富集现象较为突出.依据GB 15618-2018和GB 2762-2017,耕层土壤种Cd超标率达41.59％,水稻、玉米和红薯中Cd超标率分别为5.89％、6.25％和5.56％,显示出岩溶地质高背景区虽然土壤中重金属含量总量高,但生物有效性较低.相关分析显示,土壤-农作物系统Cd等重金属含量主要受土壤pH、土壤质地和土壤中铁锰氧化物影响. |
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| AbstractList | P595%X142; 为了揭示重庆岩溶地质高背景区土壤-农作物系统中重金属的迁移累积特征,选择在重庆市南部典型岩溶区,系统地采集大宗农作物(水稻、玉米和红薯)及其耕层土壤84组,分析测定农作物及耕层土壤中重金属砷(As)、镉(Cd)、铬(Cr)、铜(Cu)、汞(Hg)、镍(Ni)、锌(Zn)含量及理化性质,采用地统计、生物富集因子及皮尔逊相关系数分析等方法,开展重金属元素在重庆岩溶地质高背景地区土壤-农作物系统中累积特征及影响因素.结果表明,研究区水稻田、玉米地和红薯地耕层土壤重金属平均含量均高于重庆市和全国表层土壤背景值,呈现不同程度的积累,其中Cd元素富集现象较为突出.依据GB 15618-2018和GB 2762-2017,耕层土壤种Cd超标率达41.59％,水稻、玉米和红薯中Cd超标率分别为5.89％、6.25％和5.56％,显示出岩溶地质高背景区虽然土壤中重金属含量总量高,但生物有效性较低.相关分析显示,土壤-农作物系统Cd等重金属含量主要受土壤pH、土壤质地和土壤中铁锰氧化物影响. |
| Author | 李瑜 张云逸 王锐 罗恺 周皎 余亚伟 余飞 王佳彬 |
| AuthorAffiliation | 重庆土地质量地质调查重点实验室,重庆市地质矿产勘查开发局川东南地质大队,重庆400038 |
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| Author_FL | ZHANG Yunyi WANG Rui YU Yawei LUO Kai YU Fei ZHOU Jiao WANG Jiabin LI Yu |
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| DocumentTitle_FL | Characteristics and influencing factors of heavy metal accumulation in soil-crop system in the karst area with high geological background of Chongqing |
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| Keywords | 土壤-农作物系统 岩溶地质高背景区 重金属 富集系数 |
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