北海道天然林的林相分析

• 作 者: 姜孟霞
• 出 处: 林业勘查设计
• 发表日期: 1982年04期
• 关键词: 林分 树高 航空照片 径级 因子组合 复层混交林 采伐强度 树冠投影图 树种结构 林地面积

一、绪言一般所称的林相,是指树种结构的概括分类,而林型的概念,则较之明确得多,它主要是根据树高和径级等因子划分。笔者将航空照片上易于林分分层判读的林层、树种组、郁闭度级、树高组分别划成三个组,作为林分判读的标准。这种分层虽然包括林型要素,但笔者仍然将这四个因子组合的林分因子,称为林相。本文正是介绍这种林相判读的方法及其应

I. INTRODUCTION The so-called forest facies refers to the general classification of tree species structure, and the concept of forest type is much more clear than that. It is mainly based on factors such as tree height and diameter. The author classifies forest layers, tree species groups, canopy density classes and tree height groups into three groups that are easy to interpret in aerial photographs. Although this stratification includes the forest elements, but I still will these four factors combination of stand factors, known as the forest phase. This article is precisely the introduction of this method of forest phase interpretation and its application