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基于多重分形的土壤粒徑分布與土壤物理特性關(guān)系
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國家自然科學(xué)基金資助項(xiàng)目(51009152)、國家高技術(shù)研究發(fā)展計(jì)劃(863計(jì)劃)資助項(xiàng)目 (2006AA100205-1)、水利部公益性行業(yè)科研資助項(xiàng)目(200701025)和國際科技合作資助項(xiàng)目(2009DFA71850)


Relationships between Soil Particle Size Distribution and Soil Physical Properties Based on Multifractal
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    摘要:

    為闡明粒徑分布與土壤物理特性之間的關(guān)系,測(cè)定了土壤顆粒組成、土壤容積密度和飽和導(dǎo)水率等參數(shù),運(yùn)用多重分形譜參數(shù)描述了土壤粒徑分布的非均勻性,探討了土壤粒徑分布多重分形參數(shù)與土壤容積密度、飽和導(dǎo)水率等參數(shù)之間的關(guān)系。結(jié)果表明:土壤粒徑分布的多重分形譜參數(shù)D1/D0和Δα可以反映土壤粒徑分布的非均勻程度,參數(shù)與土壤粘粒含量密切相關(guān),當(dāng)土壤非均質(zhì)性較大時(shí),土壤中粘粒含量較多,表現(xiàn)為土壤容積密度增大,而飽和導(dǎo)水率減小。因此,土壤粒徑分布的多重分形參數(shù)可以作為反映土壤物理性質(zhì)的指標(biāo)。

    Abstract:

    In order to describe the relationship between soil particle size distribution and soil physical properties, the parameters of soil particle size distribution, soil bulk density and soil saturated hydraulic conductivity were measured, and the heterogeneity of soil particle size distribution was characterized by the parameters of multifractal spectrum, and then the relationship between multifractal parameters of soil particle size distribution and soil bulk density, soil saturated hydraulic conductivity were discussed. The results showed that the heterogeneity of soil particle size distribution could be reflected by the multifractal parameters of soil particle size distribution such as D1/D0 and Δα , the multifractal parameters were closely related with soil clay content, and when the soil heterogeneity is larger, the soil clay content is higher, and that results in soil bulk density increasing, soil saturated hydraulic conductivity decreasing. Therefore, the multifractal parameters of soil parameters can be used as an indicator to reflect the soil physical properties.

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管孝艷,楊培嶺,呂燁.基于多重分形的土壤粒徑分布與土壤物理特性關(guān)系[J].農(nóng)業(yè)機(jī)械學(xué)報(bào),2011,42(3):44-50. Guan Xiaoyan, Yang Peiling,Lü Ye. Relationships between Soil Particle Size Distribution and Soil Physical Properties Based on Multifractal[J]. Transactions of the Chinese Society for Agricultural Machinery,2011,42(3):44-50.

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