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    常见园林树种树冠尺度定量化研究

    关键词:园林植物;树冠尺度;生长空间;定量化;植物配置

    Key words:landscape plants; crown size; growing space; quantification; plant configuration

    摘要:树冠是园林植物形态特征的直观表达,同时也是反映植物生态效益及生物量积累的重要载体。以上海地区城镇绿化中较为常见的20种园林树木为研究对象,对不同胸径梯度的植物进行调查与测定。基于7 480株植物样本(胸径范围为8~50cm)的实测数据,对胸径-冠幅两者之间的关系进行回归拟合,并将20种园林树木的树冠尺度划分为4种扩展类型。最后,讨论了树种冠层尺度序列在园林植物种植设计中的应用,以求为植物规格选择以及数量配置等提供依据。

    Abstract:Tree crown is the visual expression of morphological characteristics of landscape plants and an important carrier of plant ecological benefit and biomass accumulation. This paper focuses on the 20 common urban landscape trees and measures the tree crown sizes of different grades of DBH. Based on the 7,480 pieces of data, the author derived species-specific stem diameter-crown width relationship and assigned the 20 tree species to 4 crown extension by cluster analysis. The result can be used to estimate the crown size at a given scale of DBH. The application for the landscape design and implication for the choice of the plant scale and number were discussed.

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