【摘要】 运用与距离有关的树木生长模型,根据油松人工林内林木的空间分布格局和树高生长量,引用生长比和郁闭比等概念对树木的枝长生长,树冠扩展过程和林分郁闭过程进行了数学模拟。模型中将树冠内各轮枝的着生状态描绘成状态矩阵的形式。通过状态矩阵结合枝长及着枝深度与叶量的关系确定出各轮枝的叶量和整株树冠的有效叶量。最后通过叶量确定林木的材积生长。更多还原

【Abstract】 This distance-dependent individual tree model was established for predicting individual tree growth of Pinus tabulaeformis. According to the tree distribution pattern, height growth, branch growth-ratio,and sta-nd closed-ratio, this model can simulate the processes of stand closing and the tree crown expansion. Combining these processes with other factors, the tree stem volume increment is calculated by available leaf weight, which can be estimated by the branching depth and the, length of branch.更多还原