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北京地区表层土壤分形特征研究
引用本文:郭中领,符素华,王向亮,张学会.北京地区表层土壤分形特征研究[J].水土保持通报,2010,30(2):154-158.
作者姓名:郭中领  符素华  王向亮  张学会
作者单位:北京师范大学,地表过程与资源生态国家重点实验室,地理学与遥感科学学院,北京,100875
基金项目:国家重点基础研究发展(973)计划项目,北京市自然科学基金 
摘    要:土壤是一种具有分形特征的复杂系统.分形维数可以反映很多土壤特性.本研究考虑了7种土壤类型、4种土地利用类型,在北京地区选取了30个典型样点,对复杂地理环境表层土壤的分形特征进行了分析,探讨了分形维数与土壤质地、土壤理化性质等方面的关系.研究结果表明,在复杂地理环境条件下,土壤颗粒分形维数总体变异性较弱;分形维数与黏粒含量呈显著正相关,与(砂粒含量+粉粒含量)和黏粒含量的比值呈显著负相关.分形维数可以反映土壤质地,但仅可指示部分重要土壤的理化性质.

关 键 词:分形维数  土壤粒径分布  土壤理化性质
收稿时间:2009/9/19 0:00:00
修稿时间:2009/11/22 0:00:00

Fractal Dimension Characteristic of Soil Particle-size Distribution in Beijing Region
GUO Zhong-ling,FU Su-hu,WANG Xiang-liang and ZHANG Xue-hui.Fractal Dimension Characteristic of Soil Particle-size Distribution in Beijing Region[J].Bulletin of Soil and Water Conservation,2010,30(2):154-158.
Authors:GUO Zhong-ling  FU Su-hu  WANG Xiang-liang and ZHANG Xue-hui
Institution:State Key Laboratory of Earth Surface Processes and Resource Ecology,School of Geography,Beijing Normal University,Beijing 100875,China;State Key Laboratory of Earth Surface Processes and Resource Ecology,School of Geography,Beijing Normal University,Beijing 100875,China;State Key Laboratory of Earth Surface Processes and Resource Ecology,School of Geography,Beijing Normal University,Beijing 100875,China;State Key Laboratory of Earth Surface Processes and Resource Ecology,School of Geography,Beijing Normal University,Beijing 100875,China
Abstract:Soil has the fractal characteristic. Soil fractal dimension (SFD) can be used as an important index of soil. In this study,30 soil samples from 7 soil types and 4 landuses were collected. Soil particle-size distribution,soil bulk density,saturated water content,saturated hydraulic conductivity,and soil organic matter were measured. The SFD was then calculated according to soil particle-size distribution. Results showed that the fractal dimension in Beijing region had a low variation coefficient. Significantly positive correlative relationships between the SFD and clay content and between the SFD and saturated hydraulic conductivity were found. The fractal dimension was negatively correlated with the ratio of (sand content + silt content)/clay content. The SFD can be a potential parameter to reflect soil texture,but is not a rational indicator to reflect soil physical properties under complex geographical environment.
Keywords:fractal dimension  particle-size distribution  soil physical-chemical property
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