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扬州城市森林群落的树种组合选择(15页)

扬州城市森林群落的树种组合选择 ———————————————————————————————— 作者: ———————————————————————————————— 日期: 扬州城市绿地植物群落的树种组合选择 摘要:采用样方调查的方法对扬州市建城区园林绿地的树木进展每木调查,记录植物名称、胸径、树高级别、树冠面积、安康状况、树龄,计算出各类植物的生长指数及综合表现,并利用系统聚类的方法进展树种间的分析。结果显示:研究区树木总计21793棵、148种,其中桂花、龙柏、女贞、银杏的综合表现在0.60以上,可作为扬州市城市绿地的基调树种;而利用SAS软件进展统计分析得到的城市绿地植物群落的树种组合可以作为扬州城市绿地植物群落的参考配置组合。 关键词:城市绿地生长指数聚类分析树种组合 Selection of tree species composition in Yangzhous urban GREEN-LAND communities Abstract: The urban green-land structure of Yangzhou city was investigated in the way of sample research in the paper. And this article made statistics on name, chest path,classes of chest height, area of tree hat, health condition, age of the plants. The result showed that in the research area of 22.6 km2 in the city there were 21793 trees and totally 148 species of the plants. Meanwhile it calculated growth index of all plants with the investigative data. Tree species selection is the most important basis in urban forest construction, and the key point is the selection of tree species composition. Through investigating and analyzing the tree species composition in the parks in Yangzhou build-up area, the sequence of integral evaluation of various tree species was obtained. By correlation analysis among tree species with the method of cluster analysis of correction (by the way of system cluster to carry on correlative analysis among tree species), the option tree species composition and the reference tree composition of Yangzhou build-up area were analyzed, the keynote tree species and five reference skeleton tree species were recommended, Key words: urban green-land, growth index, cluster analysis, tree species composition. 1.引言 树木作为城市园林绿地的主体和核心,在改善城市生态环境、营造舒适的休闲娱乐空间、促进城市的可持续开展方面发挥着重大的作用,而树木本身的种类、安康状况以及相互间的关联性是发挥其各种作用的根底[1]。城市绿地的树种选择树种是一个十分复杂的过程,其中最根底的工作是根据城市自然状况和社会特点选择适宜的树种。传统做法是依靠专家或有经历的园林工作者定性地选择树种,定量方法很少应用于树种选择中。本文以扬州市建城区的城市绿地为例,分析了扬州城市绿地的树种状况并进展根本的树种评价,利用聚类分析的方法寻找树种间的有益关系,试图为扬州城市绿地的开展,特别是大面积开展安康、稳定的城市森林群落提供根本的树种构造支持。 2.研究地区概况: 扬州市位于江苏省

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