北京城市隔离片林的建设及改造

作者在调查北京市２８片城市隔离片林基础上，指出目前片林在植物选择、种植结构、养护管理诸方面存在的问题，并对其进行分析、探讨；认为要使城市隔离片林发挥更大的效益，必须对片林进行改造．文中对片林的布局、植物材料的选择、增加单位面积绿量、完善片林种植结构及因地制宜、多种途径的改造等提出了建议．

Establishment and Reformation of Isolating Greenbelts in Beijing

Isolating greenbelt is a new comer in the system of greenlands in Beijing.It provides a wide range of benefits including ecological value,social value and economic value.Based on the investigation of 28 pieces of isolating greenbelts in Beijing,the main problems in its establishment,e.g.plant species selection,plantation structure and management are discussed.In order to give full play of its benefits,the reformation of isolating greenbelts are quite necessery;and the recommendations about the suitable pattern of isolating greenbelts in Beijing,plant species selection,improvement of isolating greenbelts structure and reformation ways are put forward.These recommendations can be used to develop management option for isolating greenbelts reformation and establishment in nowadays and fruture.