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本文研究了鼎湖山自然保区的亚热带季风常绿阔叶林的林冠结构与冠层辐射，结果表明：１．该群落的叶面和指数为１７，叶面积指数在水平方向的分布是均一的，但在垂直方向上则是非均匀的，整个群落对光能的截获率力９６．３％，其中最上层乔木截获了总入射光强的７８．２８％，下野乔木及灌草层只截获１７．８３％，但冠层辐射仍遵循消光定律。２．群落的叶倾角影呐冠层辐射，该群落冠层上部的叶倾角在４５°－７０°处具有最大分布频率，而中下层则在５°－３５°有最大分布频率。高的叶面积指数与时的直立性相关。３．该群落上层乔木枝下高较高，且中上部枝条与树干夹角较小，枝的着叶数较多且枝的着叶长度较长；而下层乔木和灌木枝下高较低，大部分枝条与树干夹角较大，且叶多着生于枝端。这种冠层格局由冠层辐射引起。４．该群落植物叶和枝条的取向在各方向上机会均等。５．群落的叶片从上到下变大，这种格局对森林的能量分配和水分平衡有重要意义。６．该季风常绿阔叶林以林冠为活动面，林冠上层呈多孔体，中下层郁团，对太阳辐射有较强的吸收能力，因而反射率较低，年均仅３．１５％。７．植物个体结构与群体结构不同，当一个有良好结构的个体处于密度较大的群体中，将会因适应坏境而改变个体生产?
The paper studied the canopy structure and canopy radiation of the subtropical monsoon evergreen broad-leaved forest in Dinghu Mountain Nature Reserve. The results showed that: 1. The leaf area and index of the community are 17, the leaf area index is uniform in the horizontal direction, but non-uniform in the vertical direction, and the interception rate of light energy of the community is 96.3% The total incident light intensity was intercepted by 78.28%. Only 17.83% was intercepted by the under-arching trees and shrub-grass layer, but the canopy radiation still obeyed the extinction law. 2. The leaf inclination angle of the community is the canopy radiation. The leaf inclination angle in the upper part of the canopy has the maximum distribution frequency at 45 ° -70 °, while the middle and lower layers have the maximum distribution frequency at 5 ° -35 °. High leaf area index is related to the uprightness of time. 3. The upper branches of the community had a higher height under the branches and the angle between the branches of the middle and upper branches was smaller than that of the trunk. The number of leaves of the branch was longer and the length of the leaves of the branches was longer. Branches and the trunk angle larger, and more leaves born in the branches. This canopy pattern is caused by canopy radiation. 4. The plant leaf and shoot orientation is equal in all directions. 5. The leaf size of the community becomes larger from top to bottom. This pattern is of great significance to the energy distribution and water balance of the forest. 6. The monsoon evergreen broad-leaved forest with the canopy as the active surface, the canopy above the porous body, the middle and lower layers of the lump, the solar radiation has a strong absorption capacity, and therefore low reflectance, an average of only 3.15% per year. 7. Plant individual structure and group structure is different, when a well-structured individuals in a population with higher density, will adapt to the bad habit and change the individual production?