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分形理论在集材道土壤团聚体研究中的应用
引用本文:李军锋,赵秀海.分形理论在集材道土壤团聚体研究中的应用[J].应用生态学报,2005,16(9):1795-1797.
作者姓名:李军锋  赵秀海
作者单位:北京林业大学,省部共建森林培育与保护教育部重点实验室,北京,100083
基金项目:国家“十五”科技攻关项目(2001BA51080704)和教育部高校青年教师奖励计划资助项目(2000103).
摘    要:分形作为一种几何工具,在处理非线性现象时十分有效。它从一个崭新的角度提供了探索局部结构与整体之间的联系方法,从而揭示了现象背后的局部与整体的本质特性和运动规律。目前,分形理论已广泛地应用于数学、物理、化学、材料科学、表面科学、生物与医学、地质和地理、地震和天文科学及计算机科学等领域的无特征尺度却有自相似性的体系中,以一种更有效、更通用的方式描述众多自然现象复杂的空间变异结构特征。同时,还能提供定量描述从小尺度到大尺度情形下的空间变异,因而成为研究和处理复杂现象强有力的理论工具。

关 键 词:分形理论  土壤团聚体  应用  集材道  局部结构  空间变异  非线性现象  计算机科学  运动规律
文章编号:1001-9332(2005)09-1795-04
收稿时间:2005-04-20
修稿时间:2005-05-31

Application of fractal theory in studying soil aggregates under different skidding modes
LI Junfeng,ZHAO Xiuhai.Application of fractal theory in studying soil aggregates under different skidding modes[J].Chinese Journal of Applied Ecology,2005,16(9):1795-1797.
Authors:LI Junfeng  ZHAO Xiuhai
Institution:Key Laboratory for Silviculture and Conservation of Education Ministry, Beijing Forestry University, Beijing 100083, China. cnlijunfeng@soho.com
Abstract:In this paper,the characters of soil aggregates under different skidding modes were investigated by fractal theory.The results showed that the particle fraction of soil aggregates was smaller under tractor- than under animal traction skidding.As for different parts of skidding road,the particle fraction of air-dried soil aggregates was in the order of bottom (2.309) > middle (2.291) > upper (2.014),while that of water-stable aggregates followed the sequence of bottom (2.04) < middle (2.143) < upper (2.262).The particle fraction of aggregates was 2.215 in forest soil and 2.175 in skidding roads.Skidding movement could improve soil aggregates when the cutting intensity was 15%.Tractor skidding was more favorable for soil aggregates formation.
Keywords:Fractal theory  Skidding mode  Soil aggregates  Cutting intensity  
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