冀北山地典型森林土壤颗粒分形特征

采用野外调查与室内分析相结合的方法,研究冀北山地典型森林土壤颗粒的分形特征与土壤物理化学性质的关系。结果表明:冀北山地7个典型森林土壤颗粒的分形维数介于2.057 0～2.379 3之间,分形维数随土层深度增加而呈减小趋势。土壤颗粒分形维数与细黏粒、细粉粒和中粉粒含量呈极显著正相关关系,与粗粉粒含量呈负相关关系,与黏粒含量相关性不显著;土壤分形维数与土壤容重呈线性正相关关系,与最大持水量、总孔隙度呈现线性负相关关系,与田间持水量相关性不明显。与速效氮和有机质呈显著负相关,与全氮、速效钾呈负相关,与pH无相关性。

Fractal Characteristics of Soil Particles of Typical Forest in North Mountain of Hebei Province

In this paper,using the combining of field investigation and laboratory analysis of the method,the relationship between fractal characteristics of soil particles and soil physical and chemical properties were carried out in typical forest types in north mountain of Hebei province.The results showed that,fractal dimension of seven typical forest types varied from 2.057 0 to 2.379 3,and with the deepening of the soil thickness,the fractal dimension was decrease.The fractal dimension and fine clay,fine silt and the silt content had all significant positive correlation.The relationship between the fractal dimensions and coarse silt content was negatively correlated.However,the fractal dimension and the clay content had not significant relation.The relationship between the fractal dimension and soil bulk density was a linear correlation.Fractal dimension with the maximum water holding capacity and total porosity showed both linear negative correlations,however,associated with the field capacity was not obvious.Fractal dimension with available nitrogen and organic matter were both significantly negatively correlated.Fractal dimension with total nitrogen and potassium were all negatively correlated,while the fractal dimension and the pH was no correlation.