河南农业科学2012，Vol.41Issue(4)：78-81,85,5.
用分形理论评价长期施肥对土壤理化性质的影响
Effects of Long-term Fertilization on Soil Properties Using Fractal Theory
摘要
Abstract
This study investigated the effects of different fertilization practices on soil physical properties and fractal features of aggregates, and evaluated the effects of fractal features on soil physical properties especially on aggregate stability using an existing fractal model. The results showed that the fractal dimension (D) seemed smaller under treatments applying organic materials than under treatment applying chemical fertilizer alone. The fractal dimension had significantly negative correlation with mean weight diameter (MWD) and geometric mean diameter (GMD) , so it could reflect aggregate size distribution as well as soil structure stability. Besides, higher D often indicated higher clay content,higher soil bulk density,and lower organic matter content,while lower D indicated more macroaggregates,lower soil bulk density,and higher organic matter content. The former often induced less macro-pores and more micro-pores, which were bad for soil water and nutrition availability,and vice versa. It was concluded that integrated application of organic and chemical fertilizers was essential for maintaining high soil quality. Under conditions where there were limited organic fertilizers,it was necessary to return crop residues into the field.关键词
土壤团聚体/分形维数/平均重量直径/几何平均直径Key words
soil aggregates/ fractal dimension/ mean weight diameter/ geometric mean diameter分类
农业科技引用本文复制引用
刘小粉,刘春增,李本银,王守刚..用分形理论评价长期施肥对土壤理化性质的影响[J].河南农业科学,2012,41(4):78-81,85,5.基金项目
公益性行业(农业)科研专项经费项目(201103005) （农业）
