Antalya ve Mersin Yöresi Kızılçam Meşcereleri için Ağaç Hacim Tabloları

Abstract

Özet: Bu çalışmada, Antalya ve Mersin yörelerinde yer alan saf ve doğal Kızılçam (Pinus brutia Ten.) meşcereleri için tek, bonitete dayalı tek ve çift girişli ağaç hacim tablolarının düzenlenmesi amaçlanmıştır. Bu amaçla 486 örnek ağaç ve bu ağaçlardan türetilen 6033 adet veri kullanılarak, ağaç hacim denklemleri geliştirilmiştir. Seçilen en uygun hacim fonksiyonlarının düzeltilmiş belirtme katsayısı ( ü .2 ), tahminin standart hatası (Sy.x), ortalama mutlak hata yüzdesi (% OMH) ve toplam hata yüzdesi (% TH) değerleri sırasıyla; tek girişli için 0. Tree Volume Tables for Calabrian Pine in Antalya and Mersin Region Abstract: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-R 2 ), 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.

Comparison of tree volume equations for brutian pine stands in Eğirdir district

“…The error variance increases as the tree height increases. According to the results of this study, Model 4, which is proposed as the most successful model are compared with the other researchers' equations (Alemdağ, 1962;Çatal 2009;Kahriman et al, 2017) in terms of the volume estimation success. The results of these comparisons are shown in Table 7.…”

“…This clearly reveals the importance of localization in tree volume estimations. Because models proposed by Çatal (2009), Kahriman et al (2017) and Alemdağ (1962) were developed with the data collected from Western Mediterranean Region, Antalya, and Mersin Regional and wide entire distribution range of Brutian pine respectively, it is quite normal for these models to produce higher errors. Local ecological conditions have a significant effect on the tree stem form and accordingly the diameter and height growth of the trees.…”

“…Tree volume equations developed for larger geographic regions are not sufficient to explain the variation in tree form, unlike the regional tree volume equations. Alemdağ (1962) 0.0046 0.0748 Çatal (2009) 0.0455 0.0976 Kahriman et. al., (2017) -0.0159 0.0764…”

“…In this study, Model 4, the suggested equation for the Brutian pine volume estimation, is compared with the volume estimations obtained from the two-entry volume tables that are developed by Alemdağ (1962), Çatal (2009) ve Kahriman et al. (2017).…”

“…It is seen that a large number of different types of models are used in the studies to develop tree volume equations (Ritchie and Hann, 1984;Hjelm and Johansson, 2012;Rachid et al, 2014). In Turkey, tree volume equations have been developed by various researchers on a regional basis (Bozkuş and Carus, 1997;Yavuz, 1999;Özkurt, 2000;Sakıcı and Yavuz, 2003;Mısır and Mısır, 2004;Kahriman et al, 2017;Özçelik and Çevlik, 2017;Özçelik and Kalkanlı, 2018;Sakıcı et al 2018).…”