一、前言杉木是我国南方用材林基地中最重要的树种。在不同的气候、土壤条件和不同的经营条件下,杉木材的生长和产量可以有很大的差别。为了评价杉木林地的生产能力;比较各种立地条件下杉木生长的优劣和衡量经营措施的效果,需要有一个统一的尺度。林业上常用的地位级表就是这样的尺度之一。但目前尚缺乏一个统一的适用于全杉木产区的杉木(实生)地位级表,而该表却是当前生产和科研中迫切 I. Introduction Cunninghamia lanceolata is the most important tree species in the timber forest base in southern China. Under different climate, soil conditions and different operating conditions, fir growth and yield can be very different. In order to evaluate the productivity of Cunninghamia lanceolata woodlands, it is necessary to have a uniform standard comparing the pros and cons of fir growth under various site conditions and measuring the effect of management measures. One of such metrics is the status rank table commonly used in forestry. However, at present, there is a lack of a unified status table for fir (real life) applicable to the entire fir-producing area. However, the table is urgent in the current production and research