广州流溪河流域毛竹林的水文生态效应  

Hydrology of Phyllostachys pubescens in Liuxihe,Guangdong Province

作　　者：王冬云[1] 张卓文[1] 苏开君 王光 雷云飞[1] 林明磊[1] 张培[1] 钟庸[1] 

机构地区：[1]华中农业大学园艺林学学院 [2]广州市林业科学研究所,广东广州510515

出　　处：《浙江林学院学报》2008年第1期37-41,共5页Journal of Zhejiang Forestry College

基　　金：广东省自然科学基金资助项目(2000-2-059-01)

摘　　要：为了了解毛竹林Phyllostachys pubescens的水文生态效应，对广州流溪河流域毛竹人工林进行大气降水、林内透雨、竹秆茎流、林下枯落物持水能力及土壤水分物理性质的测定和计算。结果表明：林外总降水量为267．4mm时，林冠截留量为67．6mm，林冠截留率为25．3％，秆茎流量为18．1mm，茎流率为6．8％，林内透雨量占总降水量的68．0％。林下枯落物层的最大持水量为1．406mm，平均最大持水率为212．6％，林下枯落物持水量与浸泡时间呈对数相关关系，枯落物吸水速率与浸泡时间呈幂函数关系。林下0～20cm层土壤饱和蓄水量为122．1mm。土壤水分入渗速率与时间也呈幂函数关系。In order to provide basis for soil and water conservation measures, precipitation, throughfafl, stem flow, water holding capacity of the litter, and the soil water physical characteristics in a Phyllostachys pubescens stand were measured in Liuxihe Forest Park of Guangzhou City, Guangdong Province from April to August in 2006. Results showed that when throughfall was 267.4 mm： a） canopy interception was 67.6 mm with an interception rate of 25.3% , b） stem flow was 18.1 mm with a stem flow rate of 6. 8% , and c） net precipitation under the canopy accounted for 68.0% of the total. The maximum water holding capacity of the litter was 1. 406 mm, and the maximum water retention rate was 212.6%. There was a logarithmic regression between water holding capacity of the litter and time of exposure with the relationship between the rate of water absorption for the litter and time of exposure being an exponential regression. Additionally, saturated water held by the soil layer from 0 - 20 cm was 122.1 mm. There was also an exponential regression for soil infiltration. [ Ch, 3 fig. 2 tab. 15 ref. ]

关 键 词：森林生态学 毛竹林 水文生态 林冠截留 枯落物 土壤 

分 类 号：S715.2[农业科学—林学]