随着城市建设的快速发展,人们对生活环境质量要求越来越高。城市生态环境建设是代表城市形象、衡量城市宜居性以及可持续发展的重要指标。园林绿化中仅栽植幼树,在短期内很难发挥其应有的生态功能和较好的景观效果,因此,目前大树种植在绿化施工中较为常见。一般苗木的胸径在15cm以上的常绿乔木或者胸径在20cm以上的落叶乔木都 With the rapid development of urban construction, people are demanding higher and higher quality of living environment. The construction of urban ecological environment is an important indicator of city image, measure of livability of the city and sustainable development. Only planting young trees in the landscape, it is difficult in the short term to play its due ecological function and better landscape effects, therefore, the current planting of large trees in greening construction is more common. Common seedlings of the evergreen trees with a diameter above 15cm or deciduous trees with a diameter above 20cm