摘要
为了全面了解人工林地的生态环境状况,采用分形理论,研究了黄土高原油松人工林地不同深度土壤颗粒的分形特征。结果表明,在油松人工林凋落物和根系等的作用下,人工林能够提高林地土壤的团聚能力,降低土壤的分形维数;不同深度油松人工林地的土壤颗粒分形维数在土壤剖面趋于均一,而且小于同种质地的其他土壤;土壤颗粒分形维数可以反映森林土壤粒径分布的变化,因而可作为评价森林土壤生态特征的指标。
In order to learn entirely about ecological environment of plantation forest,fractal theory has been used to study soil structure of Pinus tabulaeformis Carr.plantation in Loess Platean by using soil particle-size distribution at different depth.Results show that under effects of roots and humus,the soil aggregating ability has been enhanced,the fractal dimension of soil particle at different soil depth is nearly less than the same soil texture of the other place,which indicates that the fractal dimension of soil particle can reflect the distribution degree of soil particle in forestland,therefore it is taken as assessing index for forest ecological property.
出处
《西北农林科技大学学报（自然科学版）》
CSCD
北大核心
2007年第11期151-155,共5页
Journal of Northwest A&F University(Natural Science Edition)
基金
国家"十五"科技攻关重大专项(2001BA516A15-05)
陕西省自然科学基金项目(20020201093)
关键词
黄土高原
油松人工林
土壤颗粒
粒径分布
分形维数
Loess Plateau
Pinus tabulaeformis Carr.plantation
soil particles
particle-size distribution
fractal dimension
