秦岭北坡水源林区不同类型林分土壤水文特性  

Soil Hydrological Characteristics of Different Water Conservation Forests in Mountainous Regions of North Qinling Mountain

作　　者：陆斌[1] 张胜利[1,2] 晋建霞[1] 

机构地区：[1]西北农林科技大学资源环境学院,陕西杨凌712100 [2]陕西秦岭森林生态系统国家野外科学观测研究站,陕西杨凌712100

出　　处：《水土保持研究》2012年第5期176-180,共5页Research of Soil and Water Conservation

基　　金：国家林业局林业公益性行业科研专项(201004036)

摘　　要：在秦岭北坡水源林区选择不同针阔混交林和落叶混交林林分,对其土壤水文物理性质进行了研究。结果表明:土壤容重、非毛管孔隙度、最大持水量、毛管持水量和最小持水量均为针阔混交林大于落叶阔叶林,40cm土层土壤水分平均(非毛管)滞留贮存量为针阔混交林大于落叶阔叶林。针阔混交林地土壤的渗透性能较好,其平均渗透系数达到了6.93mm/min,是落叶阔叶林地的4.97倍,且同一林地内0—20cm土层的渗透系数均大于20—40cm土层。基于主成分分析,锐齿栎×油松(华山松)混交林地土壤的综合水文效应最优。Different types of forest community in medium altitude of north Qinling Mountain were chosen to study the soil water physical characteristics. Result showed that in these forests, the soil bulk densities, non-capillary porosity, maximum water-holding capacity, capillary water-holding capacity and field water holding capacity were ranked as mixed forests^deciduous broadleaved forest, while soil non-capillary porosi- ty water-holding amount of 40era layer was ranked as mixed forests^deciduous broadleaved forest. Permea- bility of raixed forest was 4.97 times higher than deciduous broadleaved forest and its mean permeability reaches 6.93 ram/rain. Permeability of 0--20 era layer was higher than that in 20--40 em layer in different types of forest soil. Based on principal component analysis, the comprehensive hydrological effect of oak and pinus tabulaeformis （Pinus armandii） was the highest.

关 键 词：秦岭 水源涵养林 持水能力 渗透性能 

分 类 号：S715[农业科学—林学]