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[目的]通过对中林和中林232两个无性系人工林生长特性进行分析,为2个无性系人工林的集约经营及其木材的合理加工与利用提供理论依据。[方法]分析2个无性系的树高、胸径和材积的生长模型和连年生长量和平均生长量的规律。[结果]中林杨2个无性系的高生长与胸径生长同步,生长中后期单株之间差异明显;树高连年生长量最大值与平均生长量最大值几乎同步出现,胸径亦如此,树高连年生长量在接近第4～5年与平均生长量相交,胸径连年生长量和平均生长量在第4～6年相交。[结论]从18年生的2个无性系生长过程来看,生长可分为3个时期:第0～5年为幼树期,树高、胸径生长比较快,第6～9年为速生期,树高、胸径生长急速上升,第10～18年为近熟期,树高、胸径生长趋缓。中林杨材积的平均生长量与连年生长量在第7～10年相交,达到数量成熟,此时可进行轮伐。
[Objective] The study aimed to analyze the growth characteristics of two clonal plantations of Zhonglin and Zhonglin 232 and provide theoretical basis for the intensive management of two clonal plantations and their rational processing and utilization of wood. [Method] The growth model of tree height, DBH and volume of two clones and the law of annual growth and average growth were analyzed. [Result] The height growth of two clones of Populus simonii synchronized with the DBH growth, and the difference was obvious between the two plants in the middle and late growth stages. The maximum value of annual growth of tree height and the maximum value of average growth appeared almost simultaneously, The number of annual growth in high perennials approached the average growth in the fourth to fifth years, and the number of annual DBH growth and the average growth rate intersected in the fourth to sixth years. [Conclusion] According to the growth process of two clones at 18 years, the growth can be divided into three stages: the 0 ~ 5 years was the sapling stage, the tree height and diameter at breast height were relatively fast, and the 6th to 9th years were the fast growing stage , Tree height, DBH growth rapidly increased, the first 10 to 18 years of near maturity, tree height, DBH growth slowed. The average growth of Pinus densiflora and its annual growth rate in the first 7 to 10 years of intersection, reaching a number of mature, this time for rotation.