长期定位施肥对潮土分形维数的影响

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。

Effects of Long-term Fertilization on Fractal Dimension

Applying soil particle size distribution(PSD) character to discribe its fractal dimension,numerous studies had been carried through about the effect of long-term located fertilization on fractal dimension and analyse about the reasons on fractal dimension.The results showed that soil particle′s fractal dimension changed with long-term fertilization.And the fractal dimension had notably increased in the treatment of high manure,moreover the varieties of fractal dimension with clay content, organic matter and CEC have prominent positive relativity,which shows that fertilization has a great effect on most characters of soil.Probably due to fertilizer ,clay content and other basic property or constitute of clay mineral changed, which resulted in variety of fractal dimension.