| 北京耕作土壤重金属含量的空间自相关分析 |
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| 引用本文： | 霍霄妮,李红,孙丹峰,张微微,周连第,李保国.北京耕作土壤重金属含量的空间自相关分析[J].环境科学学报,2009,29(6):1339-1344. |
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| 作者姓名： | 霍霄妮 李红 孙丹峰 张微微 周连第 李保国 |
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| 作者单位： | 1. 中国农业大学资源与环境学院,北京,100193
2. 北京市农林科学院农业综合发展研究所,北京,100097 |
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| 摘 要： | 以北京市耕作土壤中重金属元素为例,采用Moran's I统计量研究了土壤重金属含量的空间自相关关系、空间相关尺度以及空间分布规律.结果表明:北京市耕作土壤中8种重金属含量均存在空间自相关性.Cr、Ni、Zn、Hg、Cu、Pb、As、Cd的空间自相关尺度分别为57、75、57、55、55、65、74、37km.以cr和Hg为例,用区域空间自相关指标结合Moran散点图分析了重金属含量空间聚集区和空间孤立区在研究区内的分布规律.其中"高-高"空间聚集和"低-高"空间孤立区域存在潜在的污染风险,对土壤重金属环境质量评价和重金属污染防治有着重要的作用.
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| 关 键 词： | 北京 耕作土壤 重金属 空间自相关 |
| 收稿时间： | 2008/8/30 0:00:00 |
| 修稿时间： | 2008/12/11 0:00:00 |
Spatial autocorrelation analysis of heavy metals in cultivated soils in Beijing |
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| HUO Xiaoni,LI Hong,SUN Danfeng,ZHANG Weiwei,ZHOU Liandi and LI Baoguo.Spatial autocorrelation analysis of heavy metals in cultivated soils in Beijing[J].Acta Scientiae Circumstantiae,2009,29(6):1339-1344. |
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| Authors: | HUO Xiaoni LI Hong SUN Danfeng ZHANG Weiwei ZHOU Liandi and LI Baoguo |
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| Institution: | HUO Xiaoni1,LI Hong2,SUN Danfeng1,ZHANG Weiwei1,ZHOU Li,i2,LI Baoguo11.College of Resources , Environmental Sciences,China Agricultural University,Beijing 1001932.Institute of Comprehensive Research,Beijing Academy of Agriculture , Forestry Sciences,Beijing 100097 |
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| Abstract: | Moran's I statistics was applied to describe the spatial autocorrelation coefficients,correlation distance and spatial pattern of heavy metals in cultivated soils in Beijing.Significant spatial autocorrelations were detected for 8 heavy metals and the autocorrelation distances were:Cr,57;Ni,75;Zn,57;Hg,55;Cu,55;Pb,65;As,74 km;and Cd,37 km.Local Moran's I was used to analyze the spatial distribution pattern of the heavy metals and identify the spatial clusters and spatial outliers.Taking Cr and Hg as example... |
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| Keywords: | Beijing cultivated soil heavy metals spatial autocorrelation |
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