使用大苗是快速解决城市绿化问题分一条有效途径,应该大力提倡。但目前,风行于全国,甚至作为某些城市绿化经验广为传播的,从山上到山下,或在城市中拆东墙补西墙地移植大树是不可取的。首先,没有增加整个生态系统的总绿量,只不过是拆东补西。其次,大树移植成活率低,造成资源严重浪费,也给群众留下了很坏的印象。第三,严重破坏生态,造成原生长地植物群落结构破坏,引发水土流失、洪涝等自然灾害。第四,移植大树为保成活,需要大抹头强修剪,大树再生能力弱,恢复缓慢,树形衰败,绿化效果差,不如栽植 The use of seedlings is an effective way to quickly solve the problem of urban greening and should be vigorously promoted. However, at present, widespread in the whole country and even widely disseminated as some urban afforestation experience, it is not advisable to transplant large trees from hill to hill or demolishing walls in cities. First of all, without increasing the total amount of green in the entire ecosystem, it is only a complete divestment. Secondly, the survival rate of large tree transplants is low, causing serious waste of resources and leaving a very bad impression on the masses. Third, it seriously damaged the ecology and caused the destruction of the original plant community structure, causing natural disasters such as soil erosion and floods. Fourth, in order to survive the transplanting tree, you need to make a big head and strong pruning. The regeneration ability of the tree is weak, the recovery is slow, and the tree declines and the greening effect is poor.