不同母质类型发育土壤颗粒组成分形特征
作者:
作者单位:

1.华中农业大学资源与环境学院;2.中国电力工程顾问集团中南电力设计院有限公司

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基金项目:

国家自然科学基金项目(41630858,41807065)和中国博士后基金项目(2018M640714)


Fractal Characteristics of Particle Composition for Soils Developed from Different Parent Materials
Author:
Affiliation:

1.College of Resources and Environment, Huazhong Agricultural University;2.Central South Electric Power Design Institute CO.,LTD. of China Power Engineering Consulting Group

Fund Project:

National Natural Science Foundation of China(Nos.41630858,41807065)and the China Postdoctoral Science Foundation(No.2018M640714)

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    摘要:

    为探讨母质类型对土壤粒径分布非均匀性和土壤结构异质性的影响,采用激光粒度分析方法和分形理论,研究了冲积物﹑花岗岩残积物﹑第四纪红黏土及浅海沉积物四种母质类型发育土壤的颗粒组成﹑分形特征及土壤理化性质对颗粒组成及分形参数的影响。结果表明:(1)花岗岩残积物以及浅海沉积物发育的土壤粒径分布范围大,大颗粒含量高,非均匀性较小。冲积物和第四纪红黏土发育的土壤颗粒集中分布在2~200 μm的细颗粒区域,异质性较大。(2)从土壤颗粒体积单分形维数(D值)看,母质类型对不同发生层颗粒组成的均匀性影响有所差异。冲积物和花岗岩残积物发育的土壤颗粒分布的不均匀性从A层向C层递减,浅海沉积物发育的土壤从A层向C层,颗粒分布的不均匀性递增,第四纪红黏土发育的土壤三个发生层颗粒分布的均匀性相近;从D0值看,母质类型对不同发生层颗粒组成的分布范围影响较小。(3)不同母质类型土壤的pH﹑CEC﹑游离氧化物﹑蛭石及高岭石含量等与土壤粒径分布的异质性和分布范围表现出的差异一致(P <0.05)。以上结论表明,母质类型对土壤粒径分布及分形特征影响显著。

    Abstract:

    【Objective】 To explore the influence of different parent materials on the heterogeneity of soil particle size distribution and soil structure, 【Method】laser particle size analysis and fractal techniques were used to investigate particle composition with its fractal characteristics of soils developed from alluvium, granite residues, quaternary clay and neritic deposit. 【Result】The results showed that: 1) a wider range of particle size distribution, higher content of coarse particles but less heterogeneity was observed for soils developed from granite residues and neritic deposit, while higher concentration of fine particles within a range of 2~200 μm and higher heterogeneity for soils developed from alluvium and quaternary clay. 2) according to the D values, the influence of parent materials on the heterogeneity of particle composition varied with pedogenic layers. The heterogeneity of particle size distribution declined from A to C layer for soils developed from alluvium and granite, however, an opposite trend was observed for soils developed from neritic deposit, and less significant difference in different pedogenic layers for soils developed from quaternary clay. In addition, the type of parent materials had less influence on the range of particle size distribution among pedogenic layers in accordance with the results of D0. 3) the degree of heterogeneity and particle size range were significantly determined by soil pH, CEC, free oxides, vermiculite and kaolinite in soils developed from different parent materials (P < 0.05).【Conclusion】The above results showed that the parent materials had a significant effect on soil particle size distribution and its fractal characteristics.

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徐加盼,李继洪,魏玉杰,张光辉,阳邦戈,蔡崇法.不同母质类型发育土壤颗粒组成分形特征[J].土壤学报,2020,57(5):1197-1205. DOI:10.11766/trxb201904280012 XU Jiapan, LI Jihong, WEI Yujie, ZHANG Guanghui, YANG Bangge, CAI Chongfa. Fractal Characteristics of Particle Composition for Soils Developed from Different Parent Materials[J]. Acta Pedologica Sinica,2020,57(5):1197-1205.

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  • 收稿日期:2019-01-07
  • 最后修改日期:2020-01-13
  • 录用日期:2020-04-16
  • 在线发布日期: 2020-06-30
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