Welcome to visit Scientia Silvae Sinicae,Today is

Scientia Silvae Sinicae ›› 2014, Vol. 50 ›› Issue (10): 49-58.doi: 10.11707/j.1001-7488.20141007

Previous Articles     Next Articles

Tree Classification for Pinus tabulaeformis Scenic Plantation

Mao Bin, Xu Chengyang, Li Le, Chen Yu   

  1. Key Laboratory for Silviculture and Conservation of Ministry of Education Key Laboratory for Silviculture and Forest Ecosystem in Arid and Semi-Arid Area of State Forestry Administration, Beijing Forestry University Beijing 100083
  • Received:2013-09-10 Revised:2014-11-20 Online:2014-10-25 Published:2014-11-12

Abstract:

Tree grading is one of important foundation works in thinning of young- and middle-age stands, however tree grading techniques for scenic forests are not reported. In this study, 554 individual trees in 13 different stands of Pinus tabulaeformis scenic plantation in Xishan Forest Farm of Beijing Municipal Bureau of Landscape and Forestry were targeted to study 9 morphological indicators and 3 growth indicators, and the model between scenic beauty values and those morphological indicators and growth indicators was established for the tree grading. The integrate indicator method was applied to construct the tree height, DBH and crown growth potential. Results showed that the relationships between scenic beauty value and morphological, growth indicators were in multiple ways rather than only in linear way. Annual average increment of tree height, straightness of trunk, the ratio of DBH to tree height changed in quadratic curve way with change of SBE grades, and crown volume, annual average increment of DBH, annual average increment of crown width, crown length ratio, stretch degree of crown, growth potential changed in a positive linear trend with change of SBE grades, and the ratio of death crown length to total crown length changed in a negative linear trend with change of SBE grades. Thus the relationships between SBE value and morphological and growth indicators could be well described by non-linear model. Integrate indices which could describe tree crown morphology, harmony between trunk and crown, tree growth and trunk form were constructed according to factor analysis results. The sampled P. tabulaeformins trees were divided into 3 classes and 6 subclasses by means of systematical clustering using morphological and growth potential indicators. Class one (Ⅰ) is named as key trees of in-stand landscape and it could further be divided into quality upgrade trees of in-stand landscape (Ⅰ1) and framework trees of in-stand landscape (Ⅰ2). Class two (Ⅱ) is named as beneficial trees of in-stand landscape and it could further be divided into adjuvant trees of in-stand landscape (Ⅱ1) and potential trees of in-stand landscape (Ⅱ2). Class three (Ⅲ) is named as harmful trees of in-stand landscape and it could be divided into harmful trees of in-stand landscape (Ⅲ1) and destructive trees of in-stand landscape (Ⅲ2).

Key words: scenic forest, tree classification, scenic beauty, growth potential, Pinus tabulaeformis

CLC Number: