To explore soil physical property improvement of different plant communities in mountainous area of middle Shandong province, influences of 11 local plant communities on soil particle composition and particle size distribution were studied based on the soil fractal theory and method. First, relative weight contents of different sizes of soil particles were tested by mechanical sieving method. Second, fractal dimension of soil particles were calculated according to mass of soil particles. Results show that: soil particle size under different plant communities ranges between 0.25-1.Omm and the soil structure of stands is significantly better than that of slope wasteland. D of 11 plant communities is between 2.0044-2.4925, showing that mixed forest > pure forest > economic forest > farmland > slope wasteland. Moreover they are most sensitive to soil particles (<0.05mm), showing an evident linear positive correlation (R~2= 0.901).The experiment results can provide theoretical references and technical supports to tree species selection and stand structural configuration during vegetation recovery and reconstruction in mountainous area of middle Shandong province.
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