Welcome to visit Scientia Silvae Sinicae,Today is

Scientia Silvae Sinicae ›› 2020, Vol. 56 ›› Issue (10): 105-112.doi: 10.11707/j.1001-7488.20201011

Previous Articles     Next Articles

Relative Growth Relations between Height and Diameter of Individual Korean Pine under Competitive Environment

Guangshuang Duan1,2,Qiuyan Wang3,Xinyu Song1,Huiru Zhang2,Liyong Fu2,*   

  1. 1. School of Mathematics and Statistics, Xinyang Normal University Xinyang 464000
    2. Key Laboratory of Forest Management and Growth Modelling, National Forestry and Grassland Administration Research Institute of Forest Resource Information Techniques, CAF Beijing 100091
    3. College of Information and Management Science, Henan Agricultural University Zhengzhou 450002
  • Received:2018-09-17 Online:2020-10-25 Published:2020-11-26
  • Contact: Liyong Fu

Abstract:

Objective: Based on the game theory, the study of relative growth relationships between height and diameter of juvenile Korean pine, which was planted in Mongolian oak broad-leaved mixed forest, was carried out to provide a technology support for the regeneration and cultivation of Korean pine from broad-leaved mixed forest. Method: The total competitive trees, including Korean pine, Mongolian oak, broad-leaved trees excepted Mongolian oak and coniferous trees excepted Korean pine around 5 m radius of objective tree Korean pine, were selected through 11 plots with a hectare each of Mongolian oak broad-leaved mixed forest. Then basal area weighting distance, diameter and height corresponding to these competitive trees were calculated for constructing systems of linear simultaneous equations between height and diameter of Korean pine. Furthermore, the model was tested with cross validation and evaluated with several statistical indicators. However, the interactions between height and diameter growth of Korean pine were discussed from the insight of the game theory. Result: Growth competition model between height and diameter were excellent in fitting data. The result from method of ordinary least squares(OLS)was slightly better than that of seemingly unrelated regression(SUR). The slopes from diameter and height of Korean pine were positive and highly significant, which reflected that internal genetic factors of Korean pine had a beneficial relationship of mutualism and predominated in that. Accordingly, the perturbation from external environment was secondary. The coefficients of L, D, and H from Korean pine, Mongolian oak and broad-leaved tree were significant, and however took the opposite values for height and diameter of Korean pine, which indicated a harmful relationship of parasitism. Differently, the coefficients from coniferous tree were non-significant, which led to a relationship of synergism. Conclusion: Growth competition model between height and diameter not only objective ly described relative growth relationships of Korean pine in Mongolian oak broad-leaved mixed forest, but also revealed the resource allocation of height and diameter growth under the conditions of genetic factors or the disturbance from external environments, combining with the game theory. Furthermore, Mongolian oak broad-leaved mixed forest provided a stable environment for Korean pine.

Key words: game theory, systems of linear simultaneous equations, relative growth relationship, Korean pine, broad-leaved mixed forest

CLC Number: