摘要
用分形几何学研究了关中东部人工花椒林地土壤孔隙的分形和分布特征。在莱卡显微镜下观察和采集土壤孔隙图像,通过SISC IAS V8.0软件提取土壤孔隙的有关参数,用计盒维数法计算了土壤孔隙分形维数。在A-Ap2-Bc-Bt构造的BMC土壤剖面中,土壤孔隙平均分维值依次为1.782 77,1.684 7,1.667 81和1.679 55,总体分布呈下降渐上升趋势,孔隙维数与孔隙率、孔隙的面积和周长呈明显的相关性,相关系数(R)依次为0.939 83、0.926 93和0.845 45。孔隙分形维数能够较好地描述土壤孔隙结构的空间变异特征,孔隙分形与土壤孔隙的空间分布、形态变化、孔隙大小、孔隙边缘等因素密切相关;BMC剖面孔隙分形分布反映了花椒林这种特殊土地利用方式下土壤孔隙的变化规律。
The fractal and distribution characteristic of soil voids in artificial Chinese prickly ash forest in eastern Guanzhong area was studied by fractal geometry. The results showed that the average dimension value of soil void in BMC soil profile of A-Ap2-Bc-Bt structure was 1. 782 77,1. 684 7,1. 667 81 and 1. 679 55 and the overall distribution was first descending and then gradually ascending trend, the correlation coefficient between fractal dimension value and void rate, pore area and void perimeter was 0. 939 83,0. 926 93 and 0. 845 45 respectively. The fractal dimension of soil voids can depict the spatial variation characteristic and the fractal distribution of BMC soil profiles can reflect the change regulation of soil voids of the artificial Chinese prickly ash forest.
出处
《贵州农业科学》
CAS
北大核心
2009年第4期130-133,共4页
Guizhou Agricultural Sciences
基金
国家自然科学基金项目(40471119
40571154)
黄土与第四纪地质国家重点实验室基金项目(SKLLQG0604)
关键词
分形维数
土壤孔隙
计盒维数
人工花椒林地
fractal dimension
soil pore
box-counting method
artificial forest soil of Chinese prickly ash
