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树冠截留是森林水量平衡的重要组成部分。为探讨内蒙东部风沙干旱地区引进的优良针叶树种——樟子松对水量平衡的影响,于1983—1985年在乌兰敖都地区人工樟子松林内,对树冠截留、林下穿透雨量、树干径流等与大气降雨的关系,开展了定位观测研究,并用统计分析的方法予以拟合。截留量随大气降雨的增加而增加,当降雨量达20mm后,截留量增加的幅度逐渐减小,呈渐进趋势。该林分的最小平均截留率为24％,林下穿透雨量、树干径流同大气降雨近似呈正相关。
Canopy retention is an important part of forest water balance. In order to explore the effect of Pinus sylvestris var. Mongolica, a fine conifer species introduced into the arid and sandstorm areas east of Inner Mongolia, on the water balance in the Mongolian pine forest in 1983 and 1985, the effects of crown interception, Trunk runoff and rainfall and the relationship between the atmosphere, launched a positioning observation study, and statistical methods to be fitted. The interception rate increased with the increase of atmospheric rainfall. When the rainfall reached 20 mm, the increase of interception decreased gradually, showing a gradual trend. The minimum average interception rate of the stands was 24%. The undergrowth rainfall, trunk runoff and atmospheric rainfall were positively correlated.