泰州市海陵区主干道行道树应用现状及优化对策

Application Investigation and Countermeasures of the Main Traffic Roadside Tree in Hailing District of Taizhou City

以泰州市海陵区29条主干道路行道树为研究对象,调查了树木种类、垂直结构、径级结构、生长现状、观赏特性,结果如下:海陵区行道树分别隶属于16科22属,共计有27种,53 532棵。其中落叶树种与常绿树种比例为1∶1.1;乡土树种与外来树种比例为1∶1.8;速生树种、中生树种与慢生树种比例为3.1∶2.4∶1;行道树胸径处于Ⅰ级范围的最多,占总数的41.9%,其次是Ⅱ级范围,占36.8%,Ⅲ级和Ⅳ级数量大致持平,均在10%左右。在行道树选择上存在行道树截干苗使用比例过高、种类单一、乡土树种应用少、部分树木生长不良等问题,并提出相应的优化对策。

In this paper, traffic roadside tree of 29 streets were taken as object, the trees species, verti- cal structure, level structure, growth status, ornamental characteristics were investigated. The result showed that： All the trees were counted for 27, 53532 which belonging to 16 families, 22 genera respec- tively. Ratio of the deciduous species and evergreen tree species was 1 ： 1 ： 1 ; ratio of native tree species and exotic tree species ratio was 1：1.8 and ratio of fast-growing tree species, mlddle-growing tree species and slow-growing tree species was 3. 1： 2.4：1 ; I range DBH accounted for 41.9% and ]I range DBH accounted for 36.8% , m and 1V range DBH had equal quantity and accounted for 10%. In the trees choice, the ratio of cutting seedling was too high, and the plant configuration was relatively single. Here- by, corresponding solving measures were put forward.