Height-age model and site index curves for Acacia mangium and Eucalyptus pellita in Indonesia

Height-age growth models and site index curves were developed for the site quality evaluation of Acacia mangium Willd and Eucalyptus pellita F. Muel stands in Korintiga Hutani plantation, Pangkalan Bun, Central Kalimantan, Indonesia. In this study, the Chapman-Richards growth function was used in th...

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Bibliographic Details
Published in:Forest science and technology 2018, 14(2), 42, pp.91-96
Main Authors: Lumbres, Roscinto Ian C., Seo, Yeon Ok, Son, Yeong Mo, Doyog, Nova D., Lee, Young Jin
Format: Article
Language:English
Subjects:
Acacia mangium
Bias
Chapman-Richards function
dominant height
Eucalyptus
Forest management
Growth patterns
Mathematical models
Plantations
Quality assessment
Regression analysis
Root-mean-square errors
site evaluation
Site index
site quality
Species
Statistical analysis
Statistics
tropical forest plantation
임학
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Summary:Height-age growth models and site index curves were developed for the site quality evaluation of Acacia mangium Willd and Eucalyptus pellita F. Muel stands in Korintiga Hutani plantation, Pangkalan Bun, Central Kalimantan, Indonesia. In this study, the Chapman-Richards growth function was used in the guide curve method to generate anamorphic site index curves for the two species. In order to evaluate the developed models, coefficient of determination (R2), root mean square error (RMSE), bias ( [Formula omitted.] ), absolute mean difference (AMD), and mean percent bias (MPB) were used as statistical criteria. In addition, a simple linear regression and simultaneous F-test was performed to evaluate the relationship of the observed and the predicted dominant height of each species. Based on the statistical evaluations, simple linear regression and F-test models developed for the two species showed satisfactory results. Furthermore, the developed models explained about 98.35% and 98.60% of the total variation in the estimate of total dominant height for Acacia mangium and Eucalyptus pellita, respectively. The developed site index curves are expected to be significant for forest managers in predicting the growth patterns and classifying the site productivities of the different stands in Korintiga Hutani plantation.
ISSN:2158-0103
2158-0715
DOI:10.1080/21580103.2018.1452798