Welcome to visit Scientia Silvae Sinicae，Today is

Scientia Silvae Sinicae ›› 2012, Vol. 48 ›› Issue (3): 74-81.doi: 10.11707/j.1001-7488.20120312

Previous Articles     Next Articles

Generalized Algebraic Difference Site Index Model for Ponderosa Pine in British Columbia, Canada

Zhao Lei1,2, Ni Chengcai1, Gordon Nigh3   

  1. 1. College of Forestry, Beihua University Jilin 132013;2. Institute of Forest Resources Information Techniques, CAF Beijing 100091;3. British Columbia Ministry of Forests, Lands and Natural Resources Operations, Forest Analysis and Inventory Branch, P. O. BOX9512, Stn. Prov.Govt. Victoria, B. C. V8W 9C2, Canada
  • Received:2010-08-30 Revised:2010-10-21 Online:2012-03-25 Published:2012-03-25

PDF (PC)

601

Abstract:

Based upon 3 widely used base models, a total of 8 ADA/GADA site index models were derived. The data for these models in this study were obtained from 79 pith-split stem analysis plots and the estimation method was "indicator variable approach". We used both fit statistics and visual analysis to select the best-fit model, and attached more importance to the visual analysis. A comprehensive application analysis was also given to the selected model. The results showed: 1) GADA outperformed ADA with respect to predictions. 2) A GADA model derived from Hossfeld IV presented the best prediction ability. It was suggested that the model be used to predict dominant height and to estimate site index for ponderosa pine stands ranging 30-200 years in British Columbia, Canada. 3) The best site index age was age of 100 years, based upon relative errors of predictions.

Key words: site index model, generalized algebraic difference approach, ponderosa pine, site index age

CLC Number: