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抚育间伐是培育现有森林的一项重要措施。基于近年来国内外森林经营研究的主要成果，从林木分级、抚育间伐方法和间伐强度三个方面进行综述和评价，认为森林抚育间伐不是单纯的生物学问题，更重要的是一种经济活动。现从以下几个方面进行简述。1林木分级林木是培育森林的主要对
Thinning is an important measure to cultivate the existing forest. Based on the main achievements of forest management research at home and abroad in recent years, this paper summarizes and evaluates forest grading, tending and thinning methods and thinning intensity. It is concluded that thinning of forest tending is not a purely biological issue, but more importantly an economic activity. The following is a brief description of the following aspects. 1 Forest Grading Forest is the main breeding forest