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依据长白落叶松生物量标准地的调查数据,研究发现,在树冠以下,不同部位树干的断面积生长量基本相同;心材的形成(按颜色的不同区分)在同一年轮内是由上向下的渐变过程。在树冠内,树干边材断面积生长量与其上部的枝条边材断面积生长量大致相等。但这一关系受到树木直立及叶片空间伸展的静力学需求的制约,即树形结构是树木生理需求和力学需求的统一。
According to the survey data of Larix olgensis biomass standards, it was found that under the canopy, the growth of trunk area in different parts was basically the same; the formation of heartwood (according to the color difference) was from top to bottom in the same year The gradual process. Within the canopy, the amount of cross-sectional area of sapwood in the trunk is approximately the same as the growth of the cross-sectional area of the sapwood in the upper part. However, this relationship is governed by the statics requirements of tree upright and blade space extension, ie the tree structure is the unification of tree physiological and mechanical needs.