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[1]杨奇勇,杨劲松,余世鹏,等.不同尺度下耕地土壤Cr含量的空间自相关性分析[J].应用与环境生物学报,2011,17(03):393-397.[doi:10.3724/SP.J.1145.2011.00393]
 YANG Qiyong,YANG Jinsong,YU Shipeng,et al.Spatial Autocorrelation Analysis of Cr Content in Cultivated Soil at Different Scales[J].Chinese Journal of Applied & Environmental Biology,2011,17(03):393-397.[doi:10.3724/SP.J.1145.2011.00393]
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不同尺度下耕地土壤Cr含量的空间自相关性分析()
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《应用与环境生物学报》[ISSN:1006-687X/CN:51-1482/Q]

卷:
17卷
期数:
2011年03期
页码:
393-397
栏目:
研究论文
出版日期:
2011-06-24

文章信息/Info

Title:
Spatial Autocorrelation Analysis of Cr Content in Cultivated Soil at Different Scales
作者:
杨奇勇杨劲松余世鹏黄标孙维侠
(中国科学院南京土壤研究所 南京 210008)
Author(s):
YANG Qiyong YANG Jinsong YU Shipeng HUANG Biao SUN Weixia
(Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China)
关键词:
土壤重金属空间自相关不同尺度
Keywords:
soil heavy metal spatial autocorrelation different scales
分类号:
X825
DOI:
10.3724/SP.J.1145.2011.00393
文献标志码:
A
摘要:
以山东省禹城市耕地土壤重金属铬(Cr)元素为例,采用Moran’ s I 统计量对县级和镇级两个不同取样尺度下Cr含量的空间自相关关系、空间相关尺度和空间分布规律进行了对比研究. 结果表明:1)随着研究尺度的增大,Cr含量的变异系数增加,块基比(C0/Sill)减小,空间结构性增强;2)两个尺度下Cr含量Moran’ s I 指数都大于0,表明研究区内两个尺度下的Cr含量都存在空间正自相关,且Moran’ s I指数随着研究尺度的增加而增大;3)Lisa聚类图表明,两个尺度下Cr含量都存在空间聚集区和空间孤立区,其中“高—高”空间聚集和“低—高”空间孤立区域存在潜在Cr污染风险. 研究表明小尺度下能够观察到大尺度下观察不到的细微差别,研究可为土壤重金属环境质量评价和重金属污染防治提供重要参考. 图4 表2 参23
Abstract:
A case study done in Yucheng, Shandong, China was presented. Using Moran’ s I statistics, the spatial autocorrelation coefficients, correlation distances and spatial patterns of heavy metal Cr contents in cultivated topsoil were compared at different scales (county scale and town scale). The following results were obtained: 1) At the higher scale, the variation coefficient of Cr content increased, while C0/Sill decreased, indicating spatially structure enhanced; 2) Moran indexes of Cr content of the two scales were greater than 0, suggesting that the Cr contents at the two scales possessed spatial autocorrelation, and the Moran’s I indexes became larger at higher scale; 3) Lisa cluster maps showed that there were spatial aggregation areas and spacial isolated areas of the Cr contents at two scales, and in “high – high” spatial aggregation areas and “low – high” spatial isolation areas potential Cr pollution risks existed. This study showed that at town scale minor differences could be observed, but they would not be observed at country scale, which provided useful basis to assessment of soil environmental quality and prevention of soil pollution. Fig 4, Tab 2, Ref 23

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更新日期/Last Update: 2011-06-23