苏北杨树人工林树冠结构及生长模型研究文献综述
摘要 本研究是以江苏省泗洪县陈圩林场不同年龄的杨树作为研究对象，利用地面激光雷达提供的立木冠层三维坐标信息实现树冠结构因子的精准测量，在此基础上建立杨树人工林树冠结构和单木模型，建立与树冠结构因子有关的材积模型，并达到较高的精度，为杨树人工林的精准监测与管理提供参考。传统树冠因子的量测通过实地调查完成，容易受到环境的限制，而地面激光雷达能够直接、快速、精确、无损地获取对象的三维结构及其地理坐标，实现林分的场景还原。树冠是林木的重要组成部分，直接影响林木的生长发育，与林木的单位面积产量、材质、光合作用等有密切关系，而林木材质的好坏又直接影响到木材的价值，因此研究林木树冠结构的动态生长，对提高杨树人工林经营管理具有重要的意义。
关键字：人工林；树冠结构；单木生长模型；等高曲线
Abstract
In this study, poplar trees of different ages in ChenWei Forest Farm of SiHong County, Jiangsu Province were taken as research objects, and the precise measurement of canopy structure factors was realized by using the three-dimensional coordinate information of the canopy provided by the ground-based lidar. On this basis, the canopy structure and individual tree model of poplar plantation were established, and the volume model related to the canopy structure factors was established, and the accuracy was high. Precise monitoring and management of industrial forestry can provide reference. The traditional measurement of tree crown factor is completed by field investigation, which is easy to be limited by the environment. The terrestrial lidar can directly, quickly, accurately and nondestructively acquire the object#39;s three-dimensional structure and its geographical coordinates, and realize the scene restoration of forest. Crown is an important part of forest, which directly affects the growth and development of trees. It is closely related to yield per unit area, material quality and Photosynthesis of trees, and the quality of wood directly affects the value of wood. Therefore, it is of great significance to study the dynamic growth of tree crown structure for improving the management of poplar plantations.
Key Words: plantation; crown structure; individual tree growth model; tree height curve
1前言
1.1研究背景
杨树（Populus L）具有早期速生、适应性强、产材量大、成本低廉等特性，用途广泛，已成为制造工业原料林和防护林的首选，目前江苏省杨树林占全省总蓄积量的80%，对全省的森林覆盖率的贡献更是达到一半以上，为江苏林业生态建设，产业发展和文化发展方面做出了历史性的贡献。研究杨树人工林的林木结构与生长具有重要意义。
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