西宁周边山地主要人工林群落土壤团粒分形特征与土壤养分及抗蚀性分析

Fractal Features of Soil Aggregate,Soil Nutrient and Anti-erodibility of the Main Forest Plantation Communities around the Mountain Areas in Xining,China

为了探讨不同人工林群落对土壤团粒结构、土壤养分及土壤抗蚀性能产生的影响,在野外调查与室内分析的基础上,研究了主要人工林群落土壤水稳性团粒结构的分形维数,分析了其与土壤养分状况、土壤结构稳定性以及土壤抗蚀性能的关系。结果表明:土壤团粒结构分形维数与土壤密度、结构体破坏率呈正相关,与有机质含量、全氮、碱解N、速效P、速效K、pH值等呈负相关。说明土壤分形维数可以作为人工林群落土壤评价的指标之一。

In order to investigate the impacts of different forest plantation communities on the soil structure, soil nutrient and an-ti-erodibility, the fractal characteristics of soil water-stable aggregates and the relationship among soil nutrient, soil stability and anti-erodibility were carried out based on the field investigation and lab analysis. The results showed that the fractal dimensions of soil water-stable aggregates are positive correlated with organic matter content and structure destruction rate, but negative correlated with total N content, available N content, available P content, available K content and pH. Therefore, the soil fractal dimensions can be used as the soil index in assessing the different forest plantation communities.