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Forest and Grassland Resources Research >

2018 , Vol. 0 >Issue 1: 50 - 56

DOI: https://doi.org/10.13466/j.cnki.lyzygl.2018.01.008

Scientific Research

Analysis on the Competitive Status of Cyclobalanopsis glaucaSecondary Forest Based on the Improved Hegyi Model

  • Shisheng LONG ,
  • Siqi ZENG ,
  • Huashun XIAO ,
  • Falin LIU ,
  • Man HU
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  • College of Forestry,Central South University of Forestry & Technology,Changsha 410004,China

Received date: 2017-12-22

  Revised date: 2018-01-19

  Online published: 2020-09-27

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Abstract

The study was based on 12 fixed sample plots of Cyclobalanopsis glauca secondary forest in Loutu Forest Farm,Pingjiang County,Hunan Province.The methods of fixed radius,crown overlap and single wood influence circle were used for analysis of the competition status of Cyclobalanopsis glauca, the Hegyi competition index was improved by using the ratio of height between object wood and competitive wood.Results showed that the greater the diameter of Cyclobalanopsis glauca,the greater the scope of influence and competition.The free tree crown model was:CW=0.1773+0.2799×D,and the diameter and canopy size was positively related.The relative size of the three categories of competition indexes was Hegyi-improvement model > Bella competition index > Hegyi competition index.The results showd that the competitive index included diameter ratio,height ratio and distance and could accurately reflect the competition status of Cyclobalanopsis glauca secondary forest.

Key words： Hegyi competition index; free tree; height ratio; competitive wood; Cyclobalanopsis glauca secondary forest

Cite this article

Shisheng LONG , Siqi ZENG , Huashun XIAO , Falin LIU , Man HU . Analysis on the Competitive Status of Cyclobalanopsis glaucaSecondary Forest Based on the Improved Hegyi Model[J]. Forest and Grassland Resources Research, 2018 , 0(1) : 50 -56 . DOI: 10.13466/j.cnki.lyzygl.2018.01.008

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