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| Fractal features of soil particle size distribution and infiltration characteristics under different vegetation communities in the forestland of Yimeng mountains area |
| Zhan Haixia1,Zhang Guangcan1,Liu Xia1,Yao Xiaoyou2 |
| 1.Soil and Water Conservation Department of Forestry College,Shandong Agricultural University,Key Laboratory of Agricultural Ecology and Environment,Shandong Agricultural University,271018,Tai'an,Shandong;2.Branch of Soil and Water Conservation,Huaihe River Commission,Ministry of Water Resources,233001,Bengbu,Anhui:China |
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Abstract For exploring the improving effect and the mechanism of the forest vegetation to soil fractal structure and infiltration property in Yimeng mountainous area,composition of soil particles and infiltration under seven vegetation communities of Yimeng forestry area are studied according to the theories and means of soil fractal geometry and hydrology.Results indicate that: 1) All kinds of forest communities have obvious function of meliorating soil particle structure and characteristics of infiltration,the improved degree of coniferous and broad-leaved mixed forest（Pinus densiflora & Quecus variabilis Carr.） is higher than broad-leaved forest（Robinia pseudoacacia,Quecus variabilis Carr.） and coniferous forest（Pinus densiflora）.2) Soil particle composition which is positive correlativity obviously between the soil fractal dimension and soil infiltration rate displays a typical fragment of rocky mountainous area.3)Fractal geometry mechanism of forest communities meliorating soil fractal structure and infiltration property is that by raising the content of fine-grained soil particles to increase the soil fractal dimension,thereby improving both aggregate structure and pore structure,the degree of soil texture uniformity and the infiltration capacity is advanced.The research findings can provide reference for scientific selection and distribution of water conserving vegetation types in Yimeng mountainous area.
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Received: 04 March 2008
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