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从土壤理化性质、土壤入渗、地表径流、土壤侵蚀和土壤水分动态等几个方面比较系统地研究了山西省吉县人工油松林水土保持效益。结果表明,油松林具有明显的水土保持效益;水土保持效益受林龄和林分结构的影响,林龄越大,水土保持效益越显著;混交林的水保效益高于纯林。本文还对影响地表径流及土壤侵蚀的各因子作了逐步回归分析,并用谐波分析方法和Spearman秩相关方法建立了土壤水分含量拟合方程,找出了影响水分含量的主要因子。
The benefits of soil and water conservation of artificial Pinus tabulaeformis forest in Jixian County of Shanxi Province were systematically studied from the aspects of soil physical and chemical properties, soil infiltration, surface runoff, soil erosion and soil moisture dynamics. The results showed that the Pinus tabulaeformis forest had significant water and soil conservation benefits. The benefits of soil and water conservation were influenced by the age and the stand structure. The larger the forest age, the more obvious the benefit of soil and water conservation. This paper also made a stepwise regression analysis of the factors affecting surface runoff and soil erosion, and established the fitting equations of soil moisture content by harmonic analysis and Spearman rank correlation method, and found out the main factors affecting the moisture content.