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黃土丘陵區(qū)土壤粒徑分布單重分形和多重分形特征
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國家高技術(shù)研究發(fā)展計劃（863計劃）資助項目(2010AA10A302—1);國家科技支撐計劃資助項目（2007BAD88B05）


Monofractal and Multifractal Analysis on Soil Particle Distribution in Hilly and Gully Areas of the Loess Plateau
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    摘要:

    利用單重分形和多重分形方法定量分析黃土丘陵區(qū)土壤粒徑分布（PSD）特征，同時分析土地利用方式對PSD分形參數(shù)的影響,。結(jié)果表明：研究區(qū)PSD呈現(xiàn)出非均勻分布,，具有多重分形特征，PSD多重分形譜f(α)-α為不對稱的上凸曲線,。容量維數(shù)D0與土壤質(zhì)地相關(guān)性不明顯,，信息維數(shù)D1、關(guān)聯(lián)維數(shù)D2和多重分形譜寬Δα均與粘粒體積分?jǐn)?shù)呈極顯著正相關(guān)（P<0.01）,。土地利用方式對粘粒,、粉粒、砂粒體積分?jǐn)?shù)和Dsilt值有顯著影響（P<0.01）,。多重分形分析為詳細(xì)描述PSD提供了精確的方法和途徑,。

    Abstract:

    Monofractal and multifractal analysis were combined to quantitatively investigate soil particle size distribution (PSD) in hilly and gully areas of the Loess Plateau, and the effect of land uses on PSD parameters was analyzed. The results indicated that the PSD showed heterogeneous distribution, had multifractal feature, and multifractal spectrum functions f(α)-α were asymmetrical convex curve. There was no significant relationship between capacity dimension (D0) and soil particle contents. Clay contents were positively correlated with the entropy dimension (D1), correlation dimension (D2) and the width of multifractal spectra Δα(P<0.01). The clay contents, silt contents, sand contents and dimension of silt domain (Dsilt) values were significantly influenced by land uses (P<0.01). The multifractal analysis provided an accurate method to characterize the PSD.

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白一茹,汪有科.黃土丘陵區(qū)土壤粒徑分布單重分形和多重分形特征[J].農(nóng)業(yè)機械學(xué)報,2012,43(5):43-48,42. Bai Yiru, Wang Youke. Monofractal and Multifractal Analysis on Soil Particle Distribution in Hilly and Gully Areas of the Loess Plateau[J]. Transactions of the Chinese Society for Agricultural Machinery,2012,43(5):43-48,42.

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  • 在線發(fā)布日期: 2012-06-07
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