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Journal of the Forestry (Šumarski list), Vol. 136 No. 3-4, 2012.

Original scientific paper

Site index curves for European Chestnut (Castanea sativa Mill.) in Belasitsa mountain

Tzvetan Zlatanov ; Forest Research Institute – Sofia, 132 St. Kliment Ohridski blvd., 1756 Sofia, Bulgaria
Ivaylo Velichkov ; Forest Research Institute – Sofia, 132 St. Kliment Ohridski blvd., 1756 Sofia, Bulgaria
Georgi Hinkov ; Forest Research Institute – Sofia, 132 St. Kliment Ohridski blvd., 1756 Sofia, Bulgaria
Margarita Georgieva ; Forest Research Institute – Sofia, 132 St. Kliment Ohridski blvd., 1756 Sofia, Bulgaria
Olafur Eggertsson ; Iceland Forest Research, Mogilsa, Is-116 Reykjavik, Iceland
Saevar Hreidarsson ; The Agricultural University Of Iceland, Is-311 Borgarnes, Iceland
Magdalena Zlatanova ; Forest Research Institute – Sofia, 132 St. Kliment Ohridski blvd., 1756 Sofia, Bulgaria
Georgi Georgiev ; Forest Research Institute – Sofia, 132 St. Kliment Ohridski blvd., 1756 Sofia, Bulgaria

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Abstract

Richards, Lundqvist-Korf and Hossfeld growth functions were fitted to age-height data of European chestnut (Castanea sativa Mill.) dominant trees on the northern slopes of Belasitsa mountain, Southwest Bulgaria. The model prediction performance was evaluated using quantitative as well as qualitative examinations. Goodness of fit of each model was estimated by the coefficient of determination, F-test for significance of the regression and t-tests for significance of the coefficients of the model. Models were further compared by the evaluation of the standard error of the model and Akaike’s Information Criteria. Site index curves were constructed following the "guide curve method" procedure. In accordance with the evaluation tests, the Richards function was chosen as most adequate to express the age-dominant height relationship. Accordingly, it was further employed as a guide function to derive site index curves for studied chestnut population. It was recommended that the growth model and the site index curves elaborated in the current study are used within the data range 10−110 years.

Keywords

Castanea sativa; Guide curve method; height growth; Richards function; site index curves

Hrčak ID:

81091

URI

https://hrcak.srce.hr/81091

Publication date:

30.4.2012.

Article data in other languages: croatian

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