大兴安岭地区天然樟子松林降雨截留再分配特征  

Canopy Interception and Distribution Characteristics of Scotch Pine Forest in Da Xing'an Mountains

作　　者：李奕[1] 蔡体久[1] 满秀玲[1] 田野宏[1] 

机构地区：[1]东北林业大学林学院,哈尔滨150040

出　　处：《水土保持学报》2014年第2期40-44,共5页Journal of Soil and Water Conservation

基　　金：国家自然科学基金项目(31170420)

摘　　要：为研究大兴安岭地区樟子松林冠截留分配特征，选择黑龙江漠河森林生态系统定位研究站天然樟子松林固定样地，对其大气降雨、穿透雨、树干径流进行定位观测。通过26场降雨的观测分析，结果表明：天然樟子松林在观测期内林冠截留总量为123．48mm，占同期降雨量的25．04％。与全国其他森林类型的平均林冠截留率（11．14％～36．15％）相比，天然樟子松林的林冠截留率处于中等偏上水平。观测期内穿透雨总量和树干径流总量分别为362．85mm和6．79mm，分别占大气降雨量的73．58％和1.38％。观测发现，当降雨量Pc〉5．2mm时，樟子松才会产生树干径流，且树干径流量随树干径级的增加呈增大的趋势。运用修正的Gash模型模拟林冠截留，模拟值低于实测值5．12mm，相对误差为4．15％，说明修正的Gash模型适用于大兴安岭地区天然樟子松林。For the research of the canopy interception and distribution characteristic of Scotch Pine in Da Xing＇an Mountains, the atmospheric rainfall, the throughfall and the stemfall in the sample plots in the for- est ecosystem research station of Mohe, Heilongjiang province were observed. Trough the analysis of the 26 rainfalls, the results showed that： During the observation period, the canopy interception of the scotch pine was 127.99 mm, which accounted for 25.96% of the atmospheric rainfall. Compared to the average canopy interception rate （11.14%-36.15%） of the other types forests, the scotch pine was at the average level. The total of the throughfall and the stemfall were 358.34 mm and 6.79 mm, which accounted for 72.67% and 1.38% of the atmospheric rainfall, respectively. It found that the stemfall was produced when the PG） 5.2 mm,and with the increasing of the diameter, the stemfall showed an increasing trend. Using the revised Gash model to simulate the canopy interception, the simulation value was 9. 63 mm which lower than the measured value, and the relative error was 7.52%, which illustrated that the revised Gash model could be applied to the scotch pine forest in Da Xing＇an Mountains.

关 键 词：大兴安岭 樟子松 林冠截留 

分 类 号：S152.7[农业科学—土壤学]