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应用土壤颗粒的质量分布特征来描述其分形维数的大小,研究了长期施肥对分形维数的影响,并分析了分形维数发生变化的原因。结果表明:施肥改变了土壤颗粒的分形维数,其中施高量有机肥能显著增加土壤颗粒的分形维数,而且分形维数的变化与粘粒含量的变化,有机质含量的变化和阳离子交换量(CEC)的变化都呈现极显著的正相关性,说明施肥对土壤的主要性状产生了影响。这可能是由于施肥使粘粒含量等土壤的基本理化性状或者粘土矿物组成发生了变化,才导致了分形维数的变化。
The size distribution of soil particles is used to describe the fractal dimension. The effect of long-term fertilization on the fractal dimension is studied, and the reason for the change of fractal dimension is analyzed. The results showed that fertilization changed the fractal dimension of soil particles, in which high organic fertilizers could significantly increase the fractal dimension of soil particles, and the changes of fractal dimension and clay content, changes of organic matter content and cation exchange capacity (CEC) showed a very significant positive correlation, indicating that fertilization has an impact on the main soil properties. This may be due to fertilization so that the basic physical and chemical properties of soil such as clay content or changes in clay mineral composition, it led to the fractal dimension changes.