【摘要】 树冠是树木的重要组成部分,研究树冠结构是定向培育森林的技术手段,目前树冠模型常采用枝解析的方法。该研究用帽儿山地区天然次生林10个阔叶树种的枝条解析数据建立树冠结构相关的模型,提出了一种模拟阔叶树种枝条基径的模型,用逐步回归拟合枝条基径与总着枝深度、胸径、树高、冠幅、冠长之间的多项式回归关系,相关指数在0.9以上。模型检验结果表明冠长与着枝深度的组合对模型贡献率较小,白桦和椴树的相关指数较小。该研究对抚育整枝提供理论指导,为森林经营措施的优化提供技术支撑。更多还原

【Abstract】 Canopy is an important part of the tree. Study on the canopy structure is an important method for forest-oriented cultivation. At present, the tree canopy model is usually calculated by the branch analysis method. In this study, canopy structure related model was constructed based on the branch analysis data of 10 broad-leaved tree species in natural secondary forest of Maoershan. A model to simulate the basal diameter of branches of broadleaves was established, in which stepwise regression was used to fit the polynomial regression relationship between the branch basal diameter and depth into crown, DBH, tree height, crown width and crown length, and the correlation index was above 0.9. The model test results showed that the combination of crown length and branch depth had a lower contribution rate to the model,and the correlation index of Betula platyphylla and Tilia tuan was smaller. This study provides theoretical guidance for tending and pruning, and provides technical support for the optimization of forest management measures.更多还原