关键词: 行道树, 结构特征, 多样性指数, 重要值, 梅州市

Abstract:

Based on an investigation of the street trees of 20 main streets in the urban area of Meizhou city, the composition, structure and characteristics as well as species diversity, importance value of the street trees were analyzed. The results were as follows: 1) There were 7 133 trees, belonging to 23 species and 18 genera and 13 families, and their average DBH, crown and height were respectively 27.59 cm, 4.10 m and 6.94 m. In general their average crown was relative small. 2) S(abundance index), H(Shannon-Wiener index), and D(Simpson index) of biodiversity index were small, and there were the obvious difference in those indexes among different streets, which suggested that there were certain monotone of the tree species and structure layer. 3) The dominant species mainly consisted of evergreen trees that were Ficus virens var. sublanveolata, Ficus benjamina, Roystonea regia, Terminalia hainanensis, T. arjuna, Cinnamomum burmannii, and they were excellent tree species to fit for streets of Meizhou city. In the end, a list of 50 species, including major, general and tentative trees, were proposed according to characteristics of flora in the south subtropics.

Key words: street trees, structure and characteristics, biodiversity index, importance value, Meizhou city