陕西合阳黄河湿地土壤颗粒体积分形特征研究

本研究通过粒径分析,采用分形理论,研究了陕西合阳黄河湿地4种不同类型土壤的分形特征.结果表明:(1)体积分形维数反映出从荒地、耕地到湿地,直至退化到盐碱化荒地,土壤质地具有变粗的趋势,可以更精细地反映出土壤质地的变化.(2)体积分形维数与粘粒、粉粒和砂粒含量表现出不同的相关性.(3)分形维数在不同类型土壤剖面上随深度的变化复杂多变.

Research on the Soil Volume Fractal Characteristics of Yellow River Wetland in Heyang of Shaanxi

Four types of soil of Yellow River wetland in Heyang Shaanxi had been studied by particle size analysis and fractal theory in this article. The results shown that: (1) The difference of volume fractal dimension indicates the process from waste land, crop land to wetland and salina land, soil texture becomes more roughness, and more subtly display the difference of soil texture; (2) There are different correlativities between volume fractal dimension with the clay, silt and sand content; (3) the volume fractal dimensions in soil profile are complicated and changefully with the depth of soil profile.