基于交角的林木竞争指数

doi:10.11707/j.1001-7488.20130610

林业科学 ›› 2013, Vol. 49 ›› Issue (6): 68-73.doi: 10.11707/j.1001-7488.20130610

基于交角的林木竞争指数

惠刚盈¹, 胡艳波¹, 赵中华¹, 袁士云², 刘文桢²

1. 中国林业科学研究院林业研究所国家林业局林木培育重点实验室北京 100091;
2. 甘肃省小陇山林业实验局林业科学研究所天水 741020

收稿日期:2012-04-19 修回日期:2012-11-15 出版日期:2013-06-25 发布日期:2013-07-16
基金资助:
"十二五"国家科技支撑项目(2012BAD22B03)。

A Forest Competition Index Based on Intersection Angle

Hui Gangying¹, Hu Yanbo¹, Zhao Zhonghua¹, Yuan Shiyun², Liu Wenzhen²

1. Key Laboratory of Tree Breeding and Cultivation of State Forestry Administration Research Institute of Forestry, Chinese Academy of Forestry Beijing 100091;
2. Xiaolongshan Research Institute of Forestry of Gansu Province Tianshui 741020

Received:2012-04-19 Revised:2012-11-15 Online:2013-06-25 Published:2013-07-16

摘要/Abstract

摘要：

建立基于交角的林木竞争指数(u_a_CI_i),该指数能够同时表达出竞争木对对象木的上方遮盖和侧翼挤压。该指数取值范围为[0,1),无量纲,指数值越大,表明树体越小,所承受的竞争压力越大,清晰直观地表达林木在林分中所处的相对竞争态势。从理论上阐明大的竞争邻体比小的竞争邻体对对象木有更大影响,不仅反映在上方的遮盖也体现在侧方的挤压中。该指数与林木大小的相关性明显高于常用的HEGYI竞争指数。在测量技术飞速发展的今天,该竞争指数将具有很大的应用前景。

关键词: 单木, 竞争指数, 交角, 大小比数

Abstract:

This paper established a forest competition index (u_a_CI_i) based on intersection angle. The competition index can precisely express the over shading and the lateral extruding from the competitive trees. Its value ranges from 0 to 1 and it is non-dimensional. The greater the competition index value, the smaller the tree size, and the greater the exposure to competitive pressure. The value also directly and clearly reflects the relative competition situation of trees in a stand. This explains in theory that large neighborhood tree has bigger influence on the object tree than that of the small neighborhood, which is not only reflected on the over shading but also the lateral extruding. The competition index has closer correlation with the tree size than the commonly used HEGYI-competition index does. Therefore, this competition index will has great application prospect along with the contemporary fast development of measuring technology.

Key words: individual tree, competition index, intersection angle, neighbourhood comparison

中图分类号:

S758.1

惠刚盈, 胡艳波, 赵中华, 袁士云, 刘文桢. 基于交角的林木竞争指数[J]. 林业科学, 2013, 49(6): 68-73.

Hui Gangying, Hu Yanbo, Zhao Zhonghua, Yuan Shiyun, Liu Wenzhen. A Forest Competition Index Based on Intersection Angle[J]. Scientia Silvae Sinicae, 2013, 49(6): 68-73.

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基于交角的林木竞争指数

A Forest Competition Index Based on Intersection Angle

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