广西猫儿山毛竹林不同层次土壤含水量的降雨响应  

Response of Soil Water Contents in Different Layers to Rainfall Under Phyllostachys pubescens Forest in Mao′ershan Mountain,Guangxi

作　　者：李海防[1] 史梅容[2] 王金叶[1] 赵连生 王绍能 赵苡 

机构地区：[1]桂林理工大学旅游学院,广西桂林541004 [2]南宁职业技术学院,南宁530008 [3]猫儿山国家级自然保护区管理局,广西兴安541316

出　　处：《水土保持研究》2016年第5期120-123,128,共5页Research of Soil and Water Conservation

基　　金：国家自然科学基金(41261006;30860058);广西猫儿山国家级自然保护区漓江源森林群结构与水源涵养监测项目;广西猫儿山国家级自然保护区典型森林生态系统服务功能评估项目

摘　　要：以漓江上游猫儿山典型森林植被毛竹林(Phyllostachys pubescens)为研究对象,对其0—20,20—50,50—80cm共3个层次的土壤体积含水量进行了定位监测,分析了各层次土壤含水量的降雨响应。结果表明:(1)3个层次土壤含水量差异显著(p<0.01),年均值分别为39.49%,41.17%,44.15%,表层0—20cm土壤含水量最少,20—50cm增加,50—80cm最高。降雨与3个层次土壤含水量都呈极显著相关性。(2)从小雨到暴雨,土壤含水量对降雨的响应都可以分为平台期、上升期、峰值期和退水期;各层次土壤含水量对降雨的响应是比较复杂的。(3)在上升期,表层0—20cm土壤含水量增加最快;退水期,50—80cm土壤最快,这与前期土壤含水量及降雨强度有关系。该研究为揭示漓江上游森林植被对降水径流的调节作用,客观评估漓江上游水资源潜力,加强流域水资源管理和森林经营提供科学依据。Changes of soil water content in different layers,including 0—20cm,20—50cm and 50—80cm under Phyllostachys pubescens forest were investigated in Mao′ershan Mountain in upper reaches of Lijiang River.The results showed that：（1）there were significant differences for soil water contents in three layers（p0.01）and annual average values were 39.49%,41.17% and 44.15%,respectively,soil water content in 0—20cm was the lowest,and increased in other two layers,significant relationships between precipitation and soil water content in three soil layers were also found;（2）soil water content changed synchronously with rainfall and there were always platform stage,rising stage,peak value stage and decreasing stage in the process,response of soil water content to rainfall was comparatively complicated;（3）at the rising stage,soil water content in 0—20cm layer increased at the fastest rate and soil water in 50—80cm layer declined quickly at decreasing stage which was related with initial soil water content and intensity of rainfall.This study would provide scientific basis for better understanding of the relationships between forest vegetation and its hydrological effects,helping to facilitate water resources and achieving wise forest management in upper reaches of Lijiang River.

关 键 词：猫儿山 毛竹林 土壤含水量 降雨响应 

分 类 号：S152.7[农业科学—土壤学] S715.3[农业科学—农业基础科学]