广州城市绿地乔木种类及生长状况调查

在广州市天河区、越秀区、荔湾区、番禺区、海珠区等地选定46块面积为400 m2的标准地进行城市绿地调查,主要调查样地实际用途、样地地面覆盖信息,乔木树高、胸径、冠下高、冠幅、生长状况(包括主要病虫害)等信息,并对各样地及乔木调查数据进行分析。结果表明,46块样地共有乔木408株,涉及树种64种;应用频率较高的3个树种依次为小叶榕、垂叶榕、高山榕,其应用频率总和占总频率的67.5%;小叶榕、白兰、樟树、塞楝、红花羊蹄甲等乔木长势较好,其他树种长势一般;道路绿地树种长势较好,城市公园其次,街头绿地次之。

Investigation of Trees' Species and Growth in Guangzhou's Urban Green Spaces

Forty-six standard samples,with the area of 400 m2 each,were selected and investigated from five districts of Guangzhou,including Tianhe,Yuexiu,Liwan,Panyu and Haizhu. The investigation focused on actual use and ground covering and collected the information on tree height,DBH,height under canopy,crown diameter,growth conditions( including the major pests and diseases). The results showed that there were 408 plants of trees,belonging to 64 species. The top 3 species used in high frequency were Ficus microcarpa var. pusillifolia,F. benjamina L.,F. altissima Bl.,which accounts for 67. 5% of the total use frequency. Five species grow better than the others,including F. microcarpa var. pusillifolia,Michelia x alba,Cinnamomum camphora( L.) Presl.,Khaya senegalensis A. Juss,Bauhinia blakeana Dunn. The trees in roadline green space grow best,which is followed by urban parks and street green spaces.