杉木-观光木混交林不同经营模式土壤团粒结构的分形特征

利用分形理论、弹性分析及边际分析方法对四种不同经营模式的杉木人工林进行了研究。探讨了四种杉木人工林的土壤团粒结构分形维数对林地土壤性质变化影响的效应。结果表明:土壤>0 25nm的团聚体及水稳性团聚含量越大,团粒结构的分形维数越小,土壤肥力越高,在四种经营模式中以杉木同观光木行间混交的土壤壮况最好;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。分形理论为林地土壤科学管理提供了理论依据。

Fractal Feature of Soil Aggregation in Different Management Patterns of Chinese Fir Plantation Mixed with Tsoongiodenron odorum.Journal

In this paper, the fractal theory, elasticity analysis and marginal yield analysis were used to study the soil aggregation structure in different management patterns. The effects of soil properties variety were analyed by fractal dimension. The result showed that the more the content of the cluster >0.25nm and the water-stable cluster, the less the fractal dimension of soil cluster and the higher the soil fertility. The soil condition of Chinese fir plantation mixed with Tsoongiodenron odorum.Journal in rows has the greatest advantages in comparison among all the four management patterns. There are remarkable relationship between the fractal dimension and the content of soil cluster or water-stable cluster. The fractal theory of soil will provide scientific basis for management of forest land soil.