为研究不同土地利用方式对土壤颗粒的影响,解决土壤形态和过程复杂等问题。采用激光粒度分布仪对辽宁省铁岭市泉河流域的坡耕地、果树台田、人工林地和天然次生林4种利用类型土壤粒径含量进行测定,利用分形法对其特征进行分析,并建立坡耕地、果树台田、人工林地和天然次生林4种不同的土地利用方式土壤颗粒分形维数与土壤粘粒含量的曲线关系模型。结果表明:不同土地利用类型中坡耕地主要以粉粒为主,天然次生林和人工林地均主要以细砂粒为主,果树台田主要以极细砂粒为主;土壤颗粒的分形维数主要是由土壤中粘粒含量决定的,分形维数大小依次为:果树台田分形维数<林地分形维数<天然次生林分形维数<坡耕地分形维数。土壤粘粒含量与土壤颗粒分形维数呈显著相关关系。 In order to study the impact of different land use patterns on soil particles and solve the problems of soil morphology and process complexity. Using laser particle size distribution analyzer, the grain size of four types of soil in slopeland, fruit tree, field plantation and natural secondary forest in Quanhe River, Tieling City, Liaoning Province were measured. The fractal characteristics of the soil were also analyzed. , The fruit tree Taitian, artificial forest and natural secondary forest four kinds of land use patterns soil particle fractal dimension and soil clay content curve model. The results showed that the main cultivated slopes in different types of land use were mainly silt, while the natural secondary forest and plantation mainly consisted of fine sand. The mainly silvery sand was mainly distributed in the fruit trees. The fractal dimension of soil particles mainly consisted of Soil clay content, the size of the order of the fractal dimension is as follows: fractal dimension of fruit tree terrace