Abstract:To grasp the application status of tree species in the green spaces of the central urban area of Guangzhou, The composition and structural characteristics of the trees in 200 sample points selected from six types of green spaces through ArcGIS, including park and greenbelt, Land for square, Unit and residential area attached green space, regional green land, green area for environmental protection and Road planting in the central urban area of Guangzhou were systematically analyzed. The results showed that a total of 3 238 trees were recorded in these green spaces, belonging to 191 species of 136 genera and 60 families. Among them, more than 30 species such as Ficus microcarpa and Terminalia neotaliala were dominant tree species. The species richness of regional green spaces was the highest, while that of square green spaces and road green spaces was the lowest. The application of native tree species was generally insufficient, with the proportion of regional green spaces being relatively high and that of square green spaces being the lowest. The age and diameter structure of the trees were relatively reasonable, with mature trees being the most common, followed by old trees; large trees were the least. The average diameter of square green spaces was the largest, while that of regional green spaces was the smallest. The tree height structure was distinct, with medium-sized trees being the most common. The average height of regional green spaces was the highest, while that of park green spaces was the lowest. The crown width structure was dominated by medium-sized trees, with protective green spaces and road green spaces having the largest average crown width and park green spaces having the smallest. The overall health of the trees was good, with grade Ⅰ and grade Ⅱ healthy trees being the most common. Square green spaces had the best condition, while regional green spaces were relatively poor. Therefore, it is suggested that in future planning, the application of native plants should be increased, the selection of tree species should be enriched, the structure of tree communities should be optimized, and green space management should be strengthened. At the same time, attention should be paid to the protection of large trees and ancient and famous trees to improve and optimize the construction quality of urban green spaces in Guangzhou.
