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| Multifractal analysis on soil particle size distribution for different vegetation types in Jiangzihe small watershed |
| Yu Dongming1， Hu Xiaolan1， Zhang Guangcan1， Liu Xia1， Yao Xiaoyou2， Hu Xuli2 |
| 1.Shandong Provincial Key Laboratory of Soil Erosion and Ecological Restoration, Department of Soil and Water Conservation of Forestry College of Shandong Agricultural University，271018，Tai’an, Shandong；2.Soil and Water Conservation Division of Huaihe River Commission of Ministry of Water Resources, 233001, Bengbu, Anhui: China |
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Abstract For exploring the effect of vegetation types on heterogeneity characteristics of soil particle size distribution and soil structure, the composition of soil particles and its multifractal characteristic for five vegetation types of Jiangzihe small watershed were studied with laser particlesize analysis method and multifractal theory. The results show that: 1) The volume fractal dimension D and multifractal parameters Δα, R, f［α(-1)］- f［α(0)］ and f［α(1)］/ f［α(0)］ are significant positively correlated with the content of clay particles, i.e., the higher the content of soil fine particles, the more heterogeneous the soil particle distribution and the greater singularities. 2) The fractal dimension and multifractal parameters of different vegetation types are give as the following order: the spinney and mixed forest (Pinus massoniana+Quercus variabilis)>tea plantation(Camellia sinensis)>bamboo forest (Phyllostachys pubescens)>paddy field, which means that the forest vegetation (protective forest) could improve the heterogeneity of soil texture and soil structure by raising the content of clay particles.
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Received: 20 March 2011
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