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川西亚高山针叶林土壤颗粒的分形特征

周先容1;陈劲松2   

  1. 1涪陵师范学院生命科学系, 涪陵 408003;2中国科学院成都生物研究所, 成都 610041
  • 收稿日期:2005-09-28 修回日期:2006-04-12 出版日期:2006-08-10 发布日期:2006-08-10

Fractal characteristics of soil particles under subalpine coniferous forests in Western Sichuan

ZHOU Xianrong1 ;CHEN Jinsong2   

  1. 1Department of Life Sciences, Fuling Teachers College, Fuling 408003, China;
    2Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041

    , China

  • Received:2005-09-28 Revised:2006-04-12 Online:2006-08-10 Published:2006-08-10

摘要: 分形理论为土壤等复杂体系的定量化研究提供了一种有效工具。本文以12个川西亚高山针叶林土壤颗粒组成数据为基础,运用分形模型研究了亚高山针叶林土壤颗粒的分形维数。结果表明,12个川西亚高山针叶林表层土壤颗粒的分形维数D为2.5209~2.7978。通过逐步多元回归分析,土壤颗粒分形维数仅与<0.001 mm颗粒含量的相关系数达极显著。土壤颗粒分形维数与土壤有机质含量、全氮含量和pH相关性不显著,然而土壤有机质含量与全氮含量呈极显著正相关。本研究探讨了利用土壤颗粒粒径分布的分形维数来定量表征川西亚高山针叶林土壤的特征。 

关键词: 深水金线鱼, 渔业生物学, 最适开捕体长, ELEFAN技术, 南海北部

Abstract: Fractal theory deals with the natural figures and images with self-similarity but without characteristic length, which offers an effective tool to quantitatively study complicated systems such as soil. Based on this theory, the fractal characteristics of soil particle size distribution under the 12 subalpine coniferous forests in Western Sichuan were studied, and the results showed that the fractal dimension of soil particles in surface layer ranged from 2.5209 to 2.7978. This fractal dimension only had a very significant correlation with the content of <0.001 mm soil particles. No significant correlations were observed between thisfractal dimension and the contents of soil organic matter, total nitrogen and pH, but there was a very significant correlation between the contents of soil organic matter and total nitrogen. The quantitative symbolization of the characteristics of subalpine coniferous forest soil by the fractal dimension of soil particle size distribution was discussed in the paper.

Key words: Nemipterus bathybius, Fisheries biology, Optimum catchable size, ELEFAN technique, Northern South China Sea