近年来,随着人们的生活水平与科学文化水平的逐步提高,城市建设的快速发展,绿化美化环境已成为城市居民的一件大事,不断改善城市环境是每个居民的共同愿望。城市绿化常用的园林植物有各种乔木、灌木、草本植物等,是构成城市生态和文化环境的基本要素之一,不但要满足生态、社会和经济发展的需要,还要突出美化功能。城市绿化是一个城市的重 In recent years, with the gradual improvement of people’s living standard and scientific and cultural level and the rapid development of urban construction, greening and beautifying the environment has become a major issue for urban residents. It is the common aspiration of every resident to continuously improve the urban environment. Garden plants commonly used in urban greening are all kinds of trees, shrubs, herbs and so on. They constitute one of the basic elements of urban ecological and cultural environment. They not only meet the needs of ecological, social and economic development, but also highlight the beautification function. Urban greening is a heavy city