【摘要】 通过野外定位观测，对青冈（Ｃｙｃｌｏｂａｌａｎｏｐｓｉｓｇｌａｕｃａ）常绿阔叶林太阳辐射分布特征进行了研究．结果表明，青冈林反射辐射、透射辐射和吸收辐射的季节动态与太阳总辐射的季节动态相似，各辐射分量均为夏季最大，冬季最小，四季中群落的反射率、透射率和吸收率分别为１６％～２２％、９％～１２％和６７％～７４％．林冠层对光强的衰减率达８０％～９０％，且衰减率随太阳高度角的增大而增大．群落中部以下光强的衰减很小更多还原

【Abstract】 The forest dominated by Cycolobalanopsis glauca is one of main types of the subtropical evergreen broad leaved forest in southeast of China. The seasonal changes of reflected radiation, transmission radiation and absorption radiation in the plant communite were as same as total solar radiation. All kinds of radiation were the highest in summer and the lowest in winter. Albedo,transmissivity and absorptivity of the communite were 16%～22%, 9%～12%and 67%～74% in a year. The light intensity attenuated 80%～90% through the forest canopy and was decreasing with the sun′s altitude increasing in a day.更多还原