一、问题的提出确定森林合理年伐量,是森林经理工作的重要内容,是编制森林采伐限额的主要依据,是控制森林资源消耗的技术手段。合理年伐量要求:年采伐量低于年生长量;年伐量保持稳定或增长;最适时地主伐成熟林;能改善森林龄组结构。长期以来,常用成熟度、一林龄、二林龄、轮伐期、生长量等公式计算用材林主伐量,作为确定合理年伐量的主要依据。但是,在森林龄组面积分布不均或有多种经营类型的情况 First, the issue put forward to determine the reasonable amount of annual forest cutting is an important part of the work of forest managers, is the main basis for the preparation of forest cutting quotas, is to control the consumption of forest resources, technical means. Reasonable annual cutting requirements: annual logging less than the annual growth; annual cutting volume to maintain steady or growth; the most timely cutting of mature forests; can improve the forest age group structure. For a long time, the commonly used maturity, a forest age, two forest age, rotation period, the amount of growth and other formulas for calculating timber cutting, as the main basis for determining the reasonable annual cut. However, there are uneven distribution of forest age groups or multiple types of operations