前言本文是我们对天然杉木混交林考察的第二篇报告。一九八二年3—5月,我们在一九八○年初查的基础上结合78级学生毕业实践,在连城县范围内设置了六块标准地,进行林分和群落学调查。标准地面积为500平方米,在每块标准地内,再划分五个连续的中样方,面积5×20平方米,调查乔灌木树种的种类与数量,实测每木树高与胸径,并加以分层,按每层统计频度、盖度等,然后在每块样方的两端按一定的顺序设置2×2平方米的小样方,调 Preface This article is our second report on the study of natural fir mixed forests. From March to May 1982, on the basis of the first examination in 1980, we set six standard places in Liancheng County for forestry and community surveys based on the graduation practice of 78 students. The standard area of ​​500 square meters, in each standard area, and then divided into five consecutive sample quadrats, an area of ​​5 × 20 square meters, the type and quantity of trees and shrubs were surveyed, the height and diameter of each tree measured, and to be Layers, according to the statistics of each frequency, coverage, etc., and then at each end of each quadrat in a certain order set 2 × 2 square meters of small square, tune