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　CAOYingzi,WANG Xiaodan.Fractal Dimension of Soil Particlesize Distribution Characteristic in the Alpine Steppe of the Northern Tibet[J].Mountain Research,2014,(04):438.
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藏北高寒草原土壤粒径分布分形维数特征()

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《山地学报》[ISSN:1008-2186/CN:51-1516]

Title:: Fractal Dimension of Soil Particlesize Distribution Characteristic in the Alpine Steppe of the Northern Tibet

Author(s):: CAOYingzi; WANG Xiaodan; 1. Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu 610014, China;
2.University of Chinese Academy of Sciences, Beijing 100049, China

Keywords:: particlesize distribution; fractal dimension; alpine steppe; northern Tibet

摘要:: 基于样带采样方法，应用土壤颗粒的体积分布计算了藏北高寒草原44个土壤样品的粒径分布分形。结果显示，研究区的土壤质地主要是砂土、壤质砂土和砂质壤土，其所占比例分别为29.55％、38.64％和27.27％。分形维数介于1.979~2.743，均值为2.492。随着土壤质地向壤土、粉壤土、砂质壤土、壤质砂土、砂土的变化，分形维数逐渐增小；研究区土壤中砂粒、粉粒和粘粒的平均含量为77.65％, 18.2％和4.15％，粉粒和粘粒变异程度高。土壤粒径分形维数与土壤颗粒含量之间的关系显著，其与砂粒含量呈负相关，而与粉粒和粘粒含量呈正相关。研究结果表明：土壤粒径分布分形维数可以作为判断藏北高寒草原土壤质地差异的重要指标。

Abstract:: In present study, we investigated soil texture and soil fractal dimension with the soil particle size distribution at 44 sites along a 300 km transect across the alpine grassland of northern Tibet,China. The aim of this reseachis to explore the special characteristic of soil fractal dimension in the northern Tibet. The results showed that the main soil textures in the study area were sand, loamy sand and sandy loan. The fractal dimension ranged from1.979 to 2.743,and the mean value was 2.492. The fractal dimension was significantly difference among soil textures. The fractal dimension value decreased withthe coarser soil texture. Sand, silt and clay contentof the soil was 77.65％, 18.2％和4.15％,respectively. For the soil of alpine steppe in the northern Tibet, the fractal dimension of soil PSD was decreased significantly with sand content,but increased with silt and clay content. The result indicated that the fractal dimension of soil particlesize distribution could be used as an important index of soil texture in the northern Tibet.

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备注/Memo:: 收稿日期(Received date)：2013-02-27；改回日期(Accepted) : 2014-05-06。
基金项目（Foundation item）：中国科学院战略性先导科技专项（XDB03030505）和中科院成都山地所“一三五”项目（sds-135-1203-02）资助。\[Supported by”Strategic Priority Rearearch Program” of Chinese Academy of Sciences (XDB03030505) and the 135 Strategic Program of Institute of Mountain Hazards and Environment（sds-135-1203-02）.\]
作者简介（Biography）：曹樱子（1988-），女，湖南岳阳人，硕士研究生，主要从事高寒土壤生态方面的研究。\[Cao Yingzi（1988-），female，Hunan Yueyang person，master student，mainly engaged in research on alpine soil ecology.\] *
通信作者(Author for correspondence)：王小丹（1973-），男，四川西充人，博士生导师，研究员，主要从事高山环境与高寒生态研究。\[Wang Xiaodan（1973-），male，Sichuan Xichong person，Ph D supervisor，Professor，mainly engaged in research on alpine environment and ecology.\]

更新日期/Last Update: 1900-01-01