摘要
单木竞争指标在森林可持续经营和森林生态经营方面有很大的实际和理论价值。主要概述了单木竞争指标的概念,研究意义和制定的原则;总结了确定对象木和鉴别竞争木的方法,其中具体描述了鉴别竞争木的固定半径法、树冠重叠法、角规常数抽样法和圆锥调查法;分别归纳了与距离有关和与距离无关的单木竞争指标。与距离有关的方法中主要介绍了KKL方法、树木大小比例法、竞争影响区域法、竞争木株数控制类方法和与树冠有关的方法;阐述了与距离无关的单木竞争指标中的数量化方法即林木相对比和样地面积比例有关的方法。
The understanding of individual-tree competition indices （ITCI） is both of practical and theoreti- cal values in forest management. In this paper, the concept, research significance and principles related to ITCI were introduced. The methods of identifying reference trees and their competitors were presented, including the fixed radius method, crown overlapping method, angle gauge constant sampling method, and search cone method. Both position dependent and independent of ITCI were summarized. To modeling po- sition dependent competition, indices included the crown competition index ＂KKL＂, the competitive influ- ence zone approach, the tree size ratio method, and specific methods for estimating crown size and the number of competitors of a given reference tree. Several position independent competition measures were also evaluated, including the methods related to the ratio of tree size and sample area.
出处
《西北林学院学报》
CSCD
北大核心
2012年第6期152-158,共7页
Journal of Northwest Forestry University
基金
林业公益性行业科研专项(201104051)
关键词
对象木
竞争木
单木竞争指标
central tree
competitor
competition index of individual trees
