用林分结构分析法检验天然异令林择伐作业质量

• 作 者: 于福生
• 机 构: 牡丹江林校,
• 出 处: 林业勘查设计
• 发表日期: 1983年03期
• 关键词: 择伐作业 林分 主伐方式 森林永续利用 择伐 抛物线 林分结构 径级 群落 复层

一、引言单层或复层林相的异令林分,适于择伐主伐方式。从森林永续利用观点出发,择伐作业成败的标准应当是;在完成主伐任务的同时,使保留木仍保持异令合理结构。这种基本结构是:林分株数(空间)和径级(时间)的相关结构,是连续均匀的反抛物线曲线分布。这是异令林植生群落存在的基本形式。

First, the introduction of single-level or multi-layer forest stand side by side, suitable for the main mode of selective cutting. From the point of view of the sustainable use of forests, the criteria for success or failure of selective cutting operations should be that while the main logging task is completed, the reserved timber still maintains a structure of abnormalities and permits. The basic structure is: the correlation between the number of branches (space) and the diameter class (time) of the forest is a continuous uniform anti-parabolic curve distribution. This is the basic form that gives rise to the existence of the xerophytes.