巴丹吉林沙漠东缘不同粒级砂土空间分布的多重分形研究
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摘要
为了探讨不同粒级砂土(细砂,中砂,粗砂)空间变化的特点,引入多重分形理论,揭示粒级砂土随着土层深度空间变化情况.针对土壤属性做了空间变异性分析,利用Pearson相关系数考察了不同深度下粒级砂土分布密度之间的关系,进一步做了多重分形特征判断,表明不同粒级砂土空间分布存在多重分形的变化特征.又利用广义分形谱探讨了相应的多重分形特点.多重分形谱表明,不同土层深度下,粒级砂土空间变异性增强,同时密度空间分布的变异性依赖高密度分布区的程度增强.
In order to explore the spatial variation of different grade sand(fine sand,medium sand and coarse sand),th e multi fractal theory was introduced to reveal the distribution pattern of the grain level sand with the depth of the soil.The spatial variability of soil attributes was analyzed. The Pearson correlation coefficient was used to investigate th e relationship between the distribution density of sandy soils at different depths.The multi-fractal characteristics of sandy soils with different grain sizes were judged.The results showed that the spatial distribution of sandy soils with different grain sizes had multi-fractal characteristics.The generalized fractal spectrum is used to explore the corresponding multifractal characteristics.The multifractal spectra show that the spatial,variability of granular sand increases with the depth of soil,and the variability of spatial density distribution depends on the degree of high density distribution.
In order to explore the spatial variation of different grade sand(fine sand,medium sand and coarse sand),th e multi fractal theory was introduced to reveal the distribution pattern of the grain level sand with the depth of the soil.The spatial variability of soil attributes was analyzed. The Pearson correlation coefficient was used to investigate th e relationship between the distribution density of sandy soils at different depths.The multi-fractal characteristics of sandy soils with different grain sizes were judged.The results showed that the spatial distribution of sandy soils with different grain sizes had multi-fractal characteristics.The generalized fractal spectrum is used to explore the corresponding multifractal characteristics.The multifractal spectra show that the spatial,variability of granular sand increases with the depth of soil,and the variability of spatial density distribution depends on the degree of high density distribution.
引文
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[4]胡云锋,刘纪远,庄大方等.不同土地利用土地覆盖下土壤粒径分布的分维特征[J].土壤学报,2005,42(2):336-339.
[5]Wang XD,LiM H,LiuSZ,etal.Fractal characteristics of soils under different land-use pattern sinthearid and semiarid regions of the Tibetan Plateau,China[J].Geoderma,2006,134(12):56-61.
[6]李敏.土壤颗粒分布分形及物理性质的空间变异性[D].杨凌,西北农林科技大学,2010.
[7]杜娟,刘淑娟等.内陆砂区丘间地土壤水分时空变化分析[J].中国农学通报,2014,30(31):9-13.
[8]董莉丽,马孝燕等.吴起县退耕还林样地土壤粒径分布的单一和多重分形特征[J].干旱区资源与环境,2015,29(9):111-115.
[9]刘红梅,吕世杰等.塔木素天然梭梭林空间分布及其与林地地貌起伏变化的关系[J].生态学杂志,2015,34(9):2415-2423.
[10]茹豪,张建军,李玉婷等.黄土高原土壤粒径分形特征及其对土壤侵蚀的影响[J].农业机械学报,2015,46(4):176-182.
[11]吕世杰,张爽,刘红梅等.短花针茅荒漠草原建群种空间分布的多重分形研究[J].干旱区资源与环境,2017,31(4):106-112.
[12]Wang D,Fu B J,Zhao W W,Hu H F,Wang Y F.Multifractal characteristics of soil particle size distribution under different land-use types on the Loess Plateau[J].China.German Catena,2008,72:29-36.
[13]张洪江,王玉杰,程金花.水土保持与荒漠化防治实践教程[M].科学出版社,2013.
[14]丁国栋.风砂物理学(第二版)[M].北京:中国林业出版社,2010.
[15]周延,付强等.黑土区玉米地作物信息多重分形与多尺度相关特征研究[J].农业机械学报,2016,47(6):163-170.
[16]葛拥晓,吉力力·阿不都外力等.艾比湖干涸湖底6种景观类型不同深度富盐沉积物粒径的分形特征[J].中国沙漠,2013,33(3):804-812.
[17]管孝艳,王少丽,吕烨等.土壤水盐空间变异性及其尺度效应的多重分形分析[J].水利学报,2013,44(1):8-14.