天然红松树木生长特征与林分结构的研究

GROWTH CHARACTER OF THE TREE AND STAND CONSTITUTION IN OLD GROWTH KOREAN PINE FOREST

通过对树木生长规律和群落结构、动态过程的研究,提出了应用树木生长模型研究林分垂直结构与树木生长动态之间相互关系的新方法。预测了红松树木生长和形态的时空模式以及树木不同发育阶段影响生长主要因子的差异性。结果表明,天然红松生长和形态特征的形成是与其林隙更新途径密切相关的。在树龄160a以前主要为高生长时期,受林隙形成的垂直层次上的生境控制;树龄在160a以后为径生长时期,林木达到上层林冠,从营养生长转变为生殖生长,顶端开始结实,主干开始分叉,叶面积增大,形态呈平顶状。此阶段林木生长主要依赖于立地条件。

A new method to research the relationship between the spatial pattern of the stand and the dynamics of tree growth by using the growth model of tree is presented through analyzing on the growth pattern of tree, stand constitution and the dynamics. Then, the time and spatial model of the growth and the morphology of korean pine tree and the differences of main factors influencing on the growth of tree during different develop ment stages are forecasted. The results are as follows: The formations of growth and morphological tharacter of natural korean pine have been obviously related with the generation style of the gap. The height growth period is only before 160 years old, which was influenced mainly by light intensity. The diameter growth period is after 160 years old, which was influenced mainly by site condition. In this time, the trees got the canopy, the growth changed from vegetative period to reproduction, started seeding and branch ing, the leaf area was increasing and the shape was in flat.