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本文收集99株220年生红松的材积连年生长量材料,采用聚类分析方法,对我国天然红松林合理划分龄组问题进行了探讨。研究结果是:幼龄林1—80年,中龄林81—140年,近熟林141—160年,成熟林161—200年,过熟林201年以上。方差分析和多重比较的结果表明,相邻龄组间林木连年生长量差异显著,又与中华人民共和国林业部1982年颁发的《森林资源调查主要技术规定》中天然红松林龄组划分标准相比较,均证明本文划分标准比较科学合理。
In this paper, we collected 99 continuous-growing materials of Pinus koraiensis from 220-year-old Korean pine and studied the reason of age group of natural Korean pine by using cluster analysis method. The results are as follows: 1 to 80 years of young forest, 81 to 140 years of middle-aged forest, 141 to 160 years of near-mature forest, 161-200 years of mature forest and over 201 years of over-mature forest. Analysis of variance and multiple comparisons showed that there was significant difference in annual tree growth between adjacent age groups, and compared with the classification criteria of natural Korean pine age group in the “Major Technical Regulations of Forest Resources Survey” issued by the Ministry of Forestry of the People’s Republic of China in 1982 , All prove that this standard is more scientific and reasonable.