【作者】 郑绍伟； 李隽； 黎燕琼； 慕长龙； 陈俊华； 周大松； 谢天资； 李宇奇； 罗奕爽；

【Author】 Zheng Shao-wei;Li Jun;Li Yan-qiong;Mu Chang-long;Chen Jun-hua;Zhou da-song;Xie Tian-zi;Li Yu-qi;Luo Yi-shuang;Sichuan Academy of Forestry;Forestry Bureau of Ebian Yi Autonomous County;

【机构】 四川省林业科学研究院； 峨边彝族自治县林业局；

【摘要】 本文结合卫星图片,通过抽样调查法,调查获取成都市中心城区主要城市绿化树种的物种及其树高、胸径和冠幅等形态指标,并通过回归模型建立形态指标与三维绿量的回归模型,结果表明:1)成都市中心城区城市森林主要绿化树种的树高、胸径和冠幅等形态指标的数量结构总体呈正态分布格局,并以树高5-15m、胸径10-30cm、冠幅3-9m上的绿化树种数量最多,分别达到49.41%-95.61%,53.77%-89.04%和64.36%-64.04%,表明成都市城市森林主要绿化树种具有径阶结构有稳定性。2)树种的单株三维绿量与其树高、胸径和冠幅均呈极显著性正相关(P<0.01),并以冠幅与单株三维绿量的相关系数最大,分布在0.801~0.909;3)根据主要绿化树总的株高、冠幅和胸径的逐步回归建立回归模型,分别建立的以冠幅为自变量和冠幅与树高共同为自变量的两种模型,其模型R~2值均在0.70以上。更多还原

【Abstract】 In this paper,combined with satellite images,through sampling survey,The species,tree height,diameter at breast height and crown width of major urban greening tree species in the urban area of Chengdu were obtained.The regressive model of morphological index and three-dimensional green quantity was established by regression model.1) The results showed that The tree height,diameter at breast height and crown width of the urban greening tree species in the central urban area of Chengdu are generally distributed in a normal distribution pattern.And the number of green trees which tree height between 5-15 m,diameter between 10-30 cm,crown width between 3-9 m showed the most,and they were 49.41%-95.61%,53.77%-89.04%和 64.36%-64.04%.It showed that the main tree species of urban forest in Chengdu have diameter structure stability.2) There was a significant positive correlation between the three-dimensional green quantity,tree height,DBH and crown width of tree species(P<0.01).And the correlation coefficient between the crown width and the three-dimensional green quantity of the plant was the highest,it was 0.801~ 0.909.3) The regression model was established according to the stepwise regression of plant height,crown width and DBH of the main greening trees The R2 values of the two models with the crown width as the independent variable and the crown height and the tree height as the independent variables were all above 0.70.更多还原