日本落叶松林冠对大气降水的调节作用

研究了日本落叶松林对大气降水的再分配，结果表明：日本落叶松的饱和截留量为５ｍｍ。影响林冠截留的主要因子是降水量和降水强度；林冠截留量随着降水量的增加而增加，截留百分率随降水量的增加而减少，林冠截留率与降水强度成反比，日本落叶松冠林对降水的截留率为２４．４％，最大值出现在５，６及１１月份，为２８％～３７％，树干茎流在森林降水中的比重较小，为１．２％，通过雨量是林内降水的主要来源，它约占林内降水量的７

Effect of Canopy Interception of larix haempferi on Atomsphere Precipitation

The role of canopy interception of larix haempferi in redistribution of the atom-sphere precipitation is studied in this paper. The results show that the amount of canopysaturation interception is 5mm,and that the dominant factors influencing the canopy inter-ception are the amount and intensity of the rainfall, They also show that the rate ofcanopy interception of the precipitation is 24%,and the ratio of stemflow to forest rainfallis about 1.2%, and that the main source of forest rainfall is the throughfall whose ratio tothe forest rainfall is 74.4%.