【摘要】 应用分形理论、弹性分析及边际分析法,建立了土壤团粒结构的分形维数与土壤团聚体含量、土壤结构体破坏率之间的回归模型,研究不同杉木、马褂木造林模式的土壤团粒结构分形维数对林地土壤结构性质变化影响的效应。结果表明:土壤>0.25 mm的团聚体及水稳性团聚体含量越大,团粒结构的分形维数越小,土壤结构越好,在不同杉木、马褂木造林模式中,以杉木和马褂木混交比例(3∶1)的土壤结构性最好;土壤团粒结构的分形维数与土壤团聚体、水稳性团聚体之间存在显著回归关系。土壤团粒结构分形维数对土体性质的变化产生较大的效应,为林地土壤科学管理提供了理论依据。更多还原

【Abstract】 Using the fractal theory,elasticity analysis and marginal yield analysis,the regressive model on the fractal dimension of soil granular structure to soil aggregate content and structure damage percentage was figured out to study the effect on the soil granular structure in different mixed proportion stand C.lanceolata × L.chinense to the variety of soil structure properties.The result showed that the more the content of the aggregate(>0.25 mm) and the water stable aggregate was,the less the fractal dimension of soil granular was and the better the soil structure was.The soil in the mixed stand C.lanceolata × L.chinense with a proportion 3∶1 had greatest advantage among all of the mixed stands.There was remarkable correlation between the fractal dimension of oil granular structure and the soil aggregate and the water stable aggregate.The fractal dimension of soil granular affected the variety of the soil property.This can provide a fundamental theory for forest soil management.更多还原