城市樟子松人工林对大气降雨的截留分配  

Canopy Interception of Rainfall Partitioning by Pinus sylvestris var.mongolica Plantation in An Urban Area

作　　者：薛婷[1] 李奕 郭娜[3] 盛后财[4] Xue Ting;Li Yi;Guo Na;Sheng Houcai(Northeast Petroleum University,Daqing 163318,P.R.China;Pingxiang University;East University of Heilongjiang;Northeast Forestry University)

机构地区：[1]东北石油大学,大庆163318 [2]萍乡学院 [3]黑龙江东方学院 [4]东北林业大学

出　　处：《东北林业大学学报》2021年第8期36-39,50,共5页Journal of Northeast Forestry University

基　　金：东北石油大学引导性创新基金项目(2019Y02-23);大庆市指导性科技计划项目(zd-2019-14)。

摘　　要：在哈尔滨市城市林业示范基地(126°37′15″E,45°43′10″N),以樟子松人工林为研究对象,应用观测的20场降雨截留数据,计算穿透雨、树干径流、林冠截留,分析森林冠层对降雨的截留分配规律。结果表明:观测期内穿透雨量、树干径流量、冠层截留量,依次为185.7、29.7、123.8 mm,分别占林外降雨量54.76%、8.76%、36.51%;根据模型估算,樟子松林产生穿透雨、树干径流的阈值,分别为3.6、6.7 mm降雨;穿透雨、树干径流、林冠截留,均随降雨量的增大而增加,但其占降雨量的比例却有不同变化趋势。穿透雨量的空间变异随降雨量的增大显著减小,二者呈极显著对数函数关系(P<0.01);研究结果的林冠层截留率(36.51%),高于以往研究中樟子松截留率(5.60%~30.95%),也高于全国主要森林林冠截留率(14.7%~31.8%)的上限值。In the Harbin Urban Forestry Demonstration Base(126°37′15″E,45°43′10″N),with Pinus sylvestris var.mongolica plantation as the research object,the observation data of 20 rainfall interceptions were used to calculate the throughfall,stemflow and forest canopy interception,and analyze the interception and distribution of rainfall by forest canopy.The throughfall,stemflow and canopy interception in P.sylvestris var.mongolica plantation were 185.7,29.7 and 123.8 mm,accounting for 54.76%,8.76%and 36.51%of the totle rainfall in open field,respectively.Estimate based on model,throughfall occurred when the open field rainfall exceeded 3.6 mm and stemflow occurred only if the rainfall exceeded 6.7 mm.The amount of throughfall,stemflow and interception all increased significantly with rainfall increasing,while their ratios to rainfall showed different trends.The coefficients of variability in throughfall decreased significantly with the amount of rainfall increasing(P<0.01),and the two had logarithmic function.The canopy interception rate of this study(36.51%)is higher than those of P.sylvestris var.mongolica(5.60%-30.95%),which was also higher than the upper limit value of the main forest in China(14.7%-31.8%).

关 键 词：城市森林 樟子松人工林 林冠截留 穿透雨 树干径流 

分 类 号：S715.2[农业科学—林学]