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黄土高原油松人工林地土壤颗粒的分形特征

Journal of Northwest A & F University(Natural Science Edition)(2007)

Cited 8|Views15
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Abstract
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。
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Key words
Loess Plateau,soil particles,fractal dimension,particle-size distribution,Pinus tabulaeformis Carr.plantation
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