Fractal dimension characteristic of soil particles during the grassland reclamation and protection

In order to enhance the quantificational characteristic on the recovery condition of deteriorated grassland, the variability of soil physicochemical property and its relationships with fractal dimension of soil particle were studied in native grassland and artificial irrigation pasture in Maowusu desert. It was showed that the values of fractal dimension was 2.35 to 2.54, the contents of sand and the fractal dimension in artificial irrigation pasture were larger than those in native grassland, and the contents of organic matter was less than the native grassland. The conclusions considered that the relationships of the fractal dimension with the contents of clay and organic mater were positive correlation, the relationship with the contents of sand was negative correlation. It meant that the variability of soil physicochemical property could be indicated by the fractal dimension of soil particle, which was an aggregative and quantificational index in evaluating the soil degeneration degree of desertification grassland.