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大树一般指胸径20cm以上的落叶乔木和胸径15cm(或高度6m)以上的常绿乔木。大树移植可以迅速达到绿化、美化的园林效果,是园林城市绿化、美化不可缺少的手段和措施,也是保护在城市改建扩建工程中己成林的古树和各种树木的有效手段。
Large trees generally refers to deciduous trees with a DBH of more than 20 cm and evergreen trees with a DBH of 15 cm (or a height of 6 m) or more. Big tree transplantation can quickly achieve the greening and beautifying garden effect. It is an indispensable means and measure for afforestation and beautification of gardens and cities. It is also an effective means to protect old trees and all kinds of trees that have become forests in urban redevelopment and expansion projects.