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本文以地处中国西北干旱区的兰州市西固工业区为例，考察了该区绿化历史和现状，在此基础上，指出城市绿化树种的选择必须符合当地自然地理特征、城市发展状况、环境污染特征的原则，树种的配置应充分考虑绿化效益的发挥，同时兼顾经济可行性，并对兰州市西固工业区绿化提出了针对性的建议。
This paper takes Xigu Industrial Zone in Lanzhou City, arid region of northwestern China, as an example to examine the history and current status of greening in this area. Based on this, it points out that the selection of urban afforestation tree species must comply with the local physical and geographical characteristics, urban development conditions, and the environment. The principle of pollution characteristics, the allocation of tree species should fully consider the play of greening benefits, taking into account the economic feasibility, and put forward specific recommendations for the greening of Xigu Industrial Zone in Lanzhou City.