间伐强度对秦岭南坡锐齿栎林土壤水文特性的影响  

Effect of Thinning Intensity on Soil Hydrological Characteristics of Quercus aliena var.acuteserratain the South Slope of Qinling Mountains

作　　者：李侃[1,2] 张胜利[3,2] 孟庆旭[1] 

机构地区：[1]西北农林科技大学水土保持研究所,陕西杨陵712100 [2]陕西秦岭森林生态系统国家野外科学观测研究站,陕西杨陵712100 [3]西北农林科技大学资源环境学院,陕西杨陵712100

出　　处：《西北林学院学报》2015年第2期8-14,共7页Journal of Northwest Forestry University

基　　金：国家林业局林业公益性行业科研专项(201004036)

摘　　要：在秦岭南坡中山地带,选择有代表性的锐齿栎林样地,按照间伐强度为5%、10%、15%和20%进行间伐,并与未间伐样地进行对照,就间伐强度对锐齿栎林土壤水文特性的影响进行研究。结果表明,间伐2a后,各间伐样地土壤容重显著大于对照样地(p<0.05),总孔隙、毛管孔隙则显著小于对照样地(p<0.05),5%间伐样地土壤非毛管孔隙大于对照样地,其他间伐样地小于对照样地。随着间伐强度的增加,土壤容重显著增大(p<0.05),毛管孔隙、非毛管孔隙、总孔隙度显著下降(p<0.05),且间伐活动对A层土壤容重的影响大于B层。各间伐样地土壤的自然持水量、毛管持水量、最小持水量和最大持水量显著低于对照样地(p<0.05),随着间伐强度的增大,土壤的自然持水量、毛管持水量、最小持水量和最大持水量显著下降(p<0.05)。在各间伐样地中,5%土壤的渗透系数最大,随间伐强度的增大,各间伐样地渗透性能持续下降。基于主成分分析,锐齿栎林对照样地土壤水文功能最优,其次为5%间伐样地。土壤持水量与毛管孔隙和总孔隙有显著正相关(p<0.05),与土壤容重有显著负相关(p<0.05);渗透系数与非毛管孔隙有显著正相关(p<0.05),与土壤容重有显著负相关(p<0.05)。In order to understand the influence of thinning intensity on soil hydrological characteristics of Quercus aliena var.acuteserrata,sampling plots were established on the he south-facing slope with medium-altitude of Qinling Mountains.The plots were thinned with the intensities of 0%（control）,5%,10%,15%,and 20%.The results indicated that the soil bulk density of thinned plots were higher than those of the control（p0.05）,while the reverse result was observed on the total porosity and capillary porosity（p0.05）.The non-capillary porosity of thinning intensity at 5% was higher than the control,and other thinned plots were reverse.With the increased of thinning intensity,the soil bulk density increased significantly（p0.05）,and the capillary porosity,non-capillary porosity,and total porosity decreased significantly（p0.05）.The influence of thinning management to the soil bulk density of ＂ A layer＂ was more significant than ＂ B layer＂.The natural water holding-capacity,capillary water-holding ca-pacity,minimum water-holding capacity and maximum water-holding capacity of thinned plots were lower than the control（p0.05）.With the increase of thinning intensity,significant decreases（p0.05）were recorded in the natural water holding-capacity,capillary water-holding capacity,minimum water-holding capacity and maximum water-holding capacity.The permeability value of thinning intensity at 5% was higher than the control.With the increase of thinning intensity,permeability value decreased.Based on principal component analysis,the comprehensive hydrological effect of un-thinned plot was the best.The5%thinning intensity treatment is recommended considering the comprehensive hydrological effect among the four thinning levels.The soil water-holding capacities were positively correlated（p0.05）with the capillary porosity and total porosity,but negatively with soil bulk density（p0.05）.The permeability were positively correlated（p0.05）with non-capillary porosity,but negatively with soil bulk d

关 键 词：锐齿栎林 间伐强度 持水能力 渗透性能 

分 类 号：S718.512.3[农业科学—林学]