LUO Ming-da,YANG Ji-hua,FANG Yong,et al.Characteristics of Soil Particles Fractal Dimension under Different Vegetation Types in Yiyuan Limestone Mountain[J].Research of Soil and Water Conservation,2010,17(03):17-21.
沂源石灰岩山地不同植被类型土壤颗粒分形特征研究
- Title:
- Characteristics of Soil Particles Fractal Dimension under Different Vegetation Types in Yiyuan Limestone Mountain
- Keywords:
- limestone mountains; vegetation type; soil particle; fractal dimension
- 分类号:
- S714.5
- 摘要:
- 运用分形学理论与方法对沂源石灰岩山地营造的3种不同植被类型和封禁条件下灌草丛的土壤颗粒分形特征进行研究，结果表明：（1）不同植被类型土壤颗粒粒径质量百分含量差异显著，有林地粉黏粒含量明显高于灌草地。（2）有林地的分形维数明显大于灌草地，其中，侧柏扶芳藤混交林最大，灌草丛最小。（3）不同植被类型土壤颗粒分形维数与土壤粉黏粒含量和细砂粒含量之间呈明显的正相关（线性）关系，与极粗砂粒呈明显的负相关（线性）关系。（4）不同植被类型土壤颗粒分形维数与土壤不均匀系数呈较好负相关（线性）关系。除灌草丛外，其它3种植被类型土壤均为级配连续、不均匀性良好的土壤。采用土壤颗粒分形维数评价不同植被类型土壤结构和质地是一个重要的量化指标。
- Abstract:
- For evaluating the effect of different forest stands on soil structure and function, characteristics of soil particles fractal under four typical vegetations types in Yiyuan limestone mountain were studied according the quality principle of soil particle size distribution and theories of soil fractal. Results indicate that: (1) The soil particle size distribution of different vegetation types varied greatly. The clay and silt content of woodland is significantly higher than that of shrub-grassland. (2) Soil particles fractal dimension of woodland is significantly higher than that of shrub-grassland, and to the greatest is Platycladus orientalis+Euonymus fortunei mixed, the lowest is shrub-grassland. (3) The soil particles fractal dimension of the different vegetation types has a significant positive linear correlation between the clay and silt and fine gravel content of soil, a negative linear correlativity obviously to the coarse gravel content of soil. (4) The soil particles fractal dimension of the different vegetation types has a significant negative linear correlation with the uneven coefficient. In addition to shrub-grassland, the other three typical forest stands are good structural soil in gradation and uneven coefficient. Soil particles fractal dimension is an important quantitative index in appraising soil structure and texture among different vegetation types.
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备注/Memo
收稿日期:2009-12-9。
基金项目:山东省科技厅生态省建设重点科技攻关项目（SDSP2005-0410-06）
作者简介:罗明达（1983- ），男，硕士研究生，主要从事林业生态工程研究。E-mail：luomingda1212@163.com
通讯作者:杨吉华（1957- ），男，教授，主要从事林业生态工程的教学和研究工作。E-mail：jhyang@sdau.edu.cn