重庆市合川区行道树调查研究

Investigation on Avenue Tree in Hechuan District, Chongqing City

以重庆市合川区111条道路行道树为研究对象,对其树种选择、频度、生长状况及道路景观进行调查和分析。结果表明,合川区共有13种乔木用作行道树,隶属11科11属,以桑科最多,有3属3种,其中小叶榕(Ficus microcarpa)的频度为45%,常绿乔木占62%,乡土树种占77%;由生长势、观赏特性综合评价得出荷花玉兰(Magnolia grandiflora)、杜英(Elaeocarpus decipiens)、天竺桂(Cinnamomum japonicum)等为优势树种;合川区道路植物配置共5种景观类型,普遍存在绿化形式和层次单一的问题,绿化率低。

Taking avenue trees from 111 roads in Hechuan district of Chongqing city as objects,investigation and analysis on tree species selection,frequency,growth status and road landscape were carried out.Results showed that there were 13 tree species belonging to 11 families,11 genera used as avenue trees,among which Moraceae was the most abundant family with 3 genera and 3 species.The frequency of Ficus microcarpa was 45%,evergreen trees accounting for 62%,and native trees accounting for 77%.Through comprehensive evaluation of growth potentials and ornamental characteristics,it was concluded that Magnolia grandiflora,Elaeocarpus decipiens and Cinnamomum japonicum were dominant species.There were 5 landscape types in plant configuration of roads in Hechuan district,which were universally single greening forms and levels,and low greening rate.