Tree Volume Tables for Calabrian Pine in Antalya and Mersin Region
Öz
In this study, it is proposed to construct single, single based on site index and double entry tree volume equations for the pure Calabrian Pine stands (Pinus brutia Ten.) within the border of Antalya and Mersin Regional Forest Directorates, Turkey. Tree volume equations were developed using totally 486 sample trees and 6083 data obtained from these trees. The coefficient of determination (adj-R2), total percent error (PE), and mean absolute percentage error (MAPE) were 0.975, 52.84, -0.457 and 9.756 for single tree; 0.978, 44.84, -0.438 and 9.849 for single tree of the first site index class; 0.976, 54.44, -0.464 and 9.501for single tree of the second site index class; 0.969, 52.96, -0.452 and 9.256 for single tree of the third site index class, and 0.992, 41.26, 0.210 and 5.038 for double-entry tree volume equations, respectively. The first (%6.32) and the second (%0.45) site index values overestimated single-entry tree table values whereas the third site index values (%-4.28) underestimated the single-entry tree table values. The best fitted single, single based on site index and double entry tree volume equations were tested with independent data set for Calabrian Pine stands within the border of Antalya and Mersin Regional Forest Directorates, and concluded that these equations can be used for these stands at the 0.05 significant level.
Anahtar Kelimeler
Kaynakça
- Akalp, T. 1978. Türkiye’deki Doğu Ladini (Picea orieantalis Lk. Carr) Ormanlarında Hasılat Araştırmaları. Doktora Tezi, İstanbul Üniversitesi, Fen Bilimleri Enstitüsü, İstanbul.
- Alemdağ, İ.Ş. 1962. Türkiye’deki Kızılçam Ormanlarının Gelişimi, Hasılat ve Amenajman Esasları. Ormancılık Araştırma Enstitüsü, Teknik Bülten No: 11, Ankara, 160 s.