不同土地利用类型土壤颗粒分形特征与粘粒含量的关系  

Relationship of Soil Particles Fractal Characteristics and Clay Content under Different Land Use Ways

作　　者：任婷婷[1] 王瑄[1] 陈雯静[1] 邱野[1] 

机构地区：[1]沈阳农业大学水利学院,沈阳110161

出　　处：《沈阳农业大学学报》2013年第2期202-207,共6页Journal of Shenyang Agricultural University

基　　金：辽宁省自然科学基金项目(201102193)

摘　　要：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。For studying the effects of different land use ways on soil particle and solving the problems of the complex soil morphology, process, the contents of the soil particle size of slope field, fruit tree table field, artificial forest land and natural secondary forest land in the spring river basin were determined by using the laser article size distribution instrument, and their characteristics were also analyzed by using fractal method. The curve relation mathematical models on the fractal dimension of soil particle and soil clay content were established according to the slope field, fruit tree table field, artificial forest land and natural secondary forest land. The results revealed that silt the main part of the slope land, fine sand was the main part of natural secondary forest land and artificial forest land, and very fine sand was the main part of fruit tree table field. Soil fractal dimension was mainly composed of the soil clay content decision, land the order of Soil fractal dimension from high to low was fruit tree table field and 〈 forest land 〈 natural secondary forest land 〈 slope land. Soil clay content was found to have a significantly positive relationship with the correlation coefficient of fractal dimension of soil particles.

关 键 词：土壤颗粒 分形维数 粘粒含量 相关分析 

分 类 号：P338.6[天文地球—水文科学]