| 云南省螳螂川沿线土壤—作物系统重金属的空间分布及其迁移规律 |
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| 引用本文： | 张元旭,王吉秀,郭先华,秦丽.云南省螳螂川沿线土壤—作物系统重金属的空间分布及其迁移规律[J].北京农学院学报,2013,28(1):8-11. |
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| 作者姓名： | 张元旭 王吉秀 郭先华 秦丽 |
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| 作者单位： | 云南农业大学资源与环境学院,昆明,650201;云南农业大学资源与环境学院,昆明,650201;云南农业大学资源与环境学院,昆明,650201;云南农业大学资源与环境学院,昆明,650201 |
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| 摘 要： | 对螳螂川流域农田土壤-作物进行网格法布点采集,原子吸收分光光度法测定元素含量,分析重金属的空间分布及在农田作物系统中的富集效应,为该区农作物安全生产提供依据。结果表明,螳螂川流域土壤中Cu和Cd含量的变异系数为0.55和0.68,属强变异程度;土壤Cd含量平均达到4.27mg/kg,作物对土壤中重金属的富集系数顺序为Cr>Cd、Zn>Pb。并且油菜中Cd、Cr、Cu和蚕豆中Cu与土壤中的背景值存在极显著的相关性;土壤中Zn-Cd、Zn-Pb、Cr-Cu之间也存在极显著相关性,从土壤重金属结构和空间分布来看,五种重金属Cd、Cr、Pb、Cu、Zn的浓度梯度与周围的企业有关,说明螳螂川流域土壤重金属污染受人为干扰较严重,研究结果对合理规划工业区的农作物类型,降低土壤重金属污染风险有重要意义。
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| 关 键 词： | 螳螂川 重金属 空间分布 迁移规律 |
Spatial variability and transfer of heavy metal soil-crop system in Tanglangchuang river in Yunnan province |
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| ZHANG Yuan-xu
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WANG Ji-xiu
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GUO Xian-hua
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QIN Li.Spatial variability and transfer of heavy metal soil-crop system in Tanglangchuang river in Yunnan province[J].Journal of Beijing Agricultural College,2013,28(1):8-11. |
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| Authors: | ZHANG Yuan-xu WANG Ji-xiu GUO Xian-hua QIN Li |
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| Institution: | (College of Resources and Environment,Yunnan Agricultural University,Kunming 650201,China) |
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| Abstract: | The pollution of heavy metal in soil is related to the security of farmland ecosystem and crop.The polluted degree and the migration regularity of heavy metal elements,including Cd,Cr,Pb,Cu,Zn in farmland-crop system in TangLangChuan River watershed,were investigated.The results showed that the coefficient of variation for the containments of Cu and Cd in the soil Tanglangchuanang River watershed are 0.55 and 0.68,respectively,which stood the strong degree of variation.The average Cd containment reached 4.27 mg/kg.Enriched coefficient of heavy metal by crops from soil were as follows: Cr>Cd,Zn>Pb.And there were high correlations between the containments of Cd,Cr and Cu in rape or that of Cu in broad beans and the background values in soil.There existed significant correlations between Zn and Cd,Zn and Pb,Cr and Cu in soil as well.The concentration grades of five heavy metal Cd,Cr,Pb,Cu and Zn were related to the surrounding enterprises,which illustrated that heavy metal pollution of soil in Tanglangchuan River watershed was seriously affected by artificial disturbance.The conclusion was important to reasonable plan industrial area and reduced risk of soil pollution. |
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| Keywords: | Tanglangchuan heavy metal spatial distribution migration rules |
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