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首页> 外文会议>2011 International Conference on Electric Technology and Civil Engineering >Fractal characteristics of soil particles in surface layer after vegetation restoration of small watershed in Wuling mountain
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Fractal characteristics of soil particles in surface layer after vegetation restoration of small watershed in Wuling mountain

机译：雾灵山小流域植被恢复后表层土壤颗粒的分形特征。

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摘要

Taking Nverzhai small watershed as study area, this paper calculated fractal dimension of soil particles in surface layers by using weight distribution content based on large-density sampling in watershed. The relationship between fractal dimension and soil characters as well as environmental factors can be analyzed. The results showed that fractal dimension values ranged from 2.2558 to 2.7772, and its variability were not obvious. Fractal dimension values increased with decreasing diameter of soil texture. In soil characters, fractal dimension was negatively correlated with sand(1∼0.05mm) content and bulk density. It was positively correlated with clay (<0.002 mm) content and TN, but had no significant correlations between soil organic matter, TP and available P. In environmental factors, fractal dimension increased with raising of elevation. No significant relations were observed between fractal dimension and soil types as well as slope. Fractal dimension values of forest were generally larger than farmland, this showed that it should mainly persist in the method of vegetation restoration in watershed. This can improve the ability of water conservation of soil and had significance to prevent soil and water loss.
机译：以Nverzhai小流域为研究区域，以流域大密度采样为基础，利用权重分布内容，计算表层土壤颗粒的分形维数。可以分析分形维数与土壤特征以及环境因素之间的关系。结果表明，分形维数范围在2.2558〜2.7772之间，变异性不明显。分形维数值随土壤质地直径的减小而增加。在土壤特征中，分形维数与沙子（1〜0.05mm）含量和堆积密度呈负相关。它与粘土（<0.002 mm）含量和总氮呈正相关，但与土壤有机质，总磷和速效磷之间无显着相关性。在环境因素中，分形维数随海拔升高而增加。分形维数与土壤类型以及坡度之间未发现显着关系。森林的分形维数一般都大于农田，这表明它应主要坚持流域的植被恢复方法。这样可以提高土壤的水保护能力，对防止水土流失具有重要意义。

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