成都市中心城区城市森林树木的数量结构特征
Study on quantitative structure characteristics of forest in central of Chengdu City
黎燕琼 1郑绍伟 1陈俊华 1李宇奇 1罗奕爽 1慕长龙1
作者信息
- 1. 四川省林业科学研究院, 四川成都610081
- 折叠
摘要
采用遥感图像判读和野外调查相结合的方法,定量分析了成都市中心城区城市森林树木的数量结构特征.结果表明,成都市中心城区绿化树种丰富,收集到118种,属于40科62属,灌木的数量比例为3.71％,常绿树种的数量比例为53.48％,数量比例大于1％的乔木树种有22种.树种的重要值大于0.03的有11个树种,重要值累计为0.685,并表现为香樟(0.119)>天竺桂(0.087)>刺槐(0.085)>垂柳(0.082)>黄葛榕(0.064)>水杉(0.057)>女贞(0.048)>栾树(0.041)>银杏(0.039)>喜树(0.032)>杨树(0.031).树木株数和物种数在树高(H)和胸径(DBH)上表现为5 m≤H<10 m和10 cm≤DBH<30 cm等级分布的最多,在单株树冠投影面积(S)和三维绿量(V)上则总体表现为树木株数和物种数随着树冠投影面积和三维绿量等级的增加逐渐减少.H<15 m和DBH<30 cm的树木分别占91.38％和88.74％,S<50 m2和V<100 m3的树木分别占869.3％和70.49％,表明成都市中心城区绿化树种不仅在高度和胸径等形态生长上具有较大的发展潜力,在三维绿量上也具有较大的增长空间.
Abstract
By using the method of remote sensing image interpretation and field investigation, this paper quantitatively analyzed the quantitative structure and greening structure of forest in the central of Chengdu City, the results showed that: there were 118 species of tree species in the central urban area, belonging to 40 families and 62 genera;the number of shrub and evergreen trees accounted for 3.71％and 53.48％ respectively;22 species of trees with the ratio of more than 1％and 11 species of tree with an important value more than 0.003.The cumulative important value of top 11 species achieved 0.685, among them, it showed that Cinnamomum camphora(0.119), Cinnamomum japonicum(0.087), Robinia pseudoacacia(0.085), Salix babylonica(0.082), Ficus benguetensis(0.064), Metasequoia glyptostroboides(0.057), Ligustrum lucidum(0.048), Koelreuteria paniculata(0.041), Ginkgo biloba(0.039), Camptotheca acuminate(0.032) and Populus(0.031).The number of trees and species in the tree height (5 m≤H<10 m) and DBH (10 cm≤DBH<30 cm) was the largest, but decreased with the increase of crown cover area and tridimensional green volume.The trees with tree height below 15 m or DBH smaller 30 cm accounted for 91.38％and 88.74％respectively.The tree species with tree canopy cover area under 50 m2 of tridimensional green volume less than 100 m3 took a part of 86.93％and 70.49％respectively.The result indicates that the greening tree species in the central urban area of Chengdu not only have great development potential in the form of height and DBH, but also have a large growth space on the green quantity.
关键词
城市森林/数量结构/绿化结构/成都市Key words
urban forest/quantity structure/green structure/Chengdu City引用本文复制引用
基金项目
林业公益性行业科研专项(201404301)
国家科技支撑计划课题(2015BAD07B06)
出版年
2018
国家科技期刊平台
NSTL
维普
万方数据