关键词: 低效林, 类型划分, 改造技术

Abstract: The low-benefit forests can be divided into five types,according to the actual situation,forming reason,distribution location and functional requirements in Beijing Daxing district.They are the poplar timber low-benefit forest,the farmland shelterbelt low-benefit forest,the urban surrounding low-benefit,the green landscape low-benefit forest and the urban access road landscape low-benefit forest.For all types of causes,this paper puts forward the technical impovement measures for various types of low-benefit forest and tries to provide references for similar low-benefit forest impovement.

Key words: low-benefit forest, type classification, impovement technology