Developing generalized height-diameter models for natural brutian pine stands in Antalya district

Abstract

Brutian pine is one of the important commercial species for forest products industry of Turkey. In this study, diameter (d)-height (h) models for natural Brutian pine stands in Antalya District were developed using the breast height diameter and some stand characteristics as regressors. In this study, a total of 16 models, the data used were obtained from 59 sample plots from natural Brutian pine stands in Antalya District, were tested. The available data for the species were split into two sets: the majority (%85) was used to estimate model parameters, and the remaining data (%15) were reserved to validate the models. The performance of the models was compared and evaluated with six model performance criteria. According to the model performance criteria, the best results were obtained with Pienaar (1991-II), Sloboda et al. (1993-I), and Sharma and Parton (2007) models, respectively. The similar results were obtained using independent dataset. Keywords: Brutian pine, Height, Diameter, Generalized models

Keywords

• Brutian pine, Height, Diameter, Generalized models

Antalya yöresi doğal kızılçam meşcereleri için genelleştirilmiş çap-boy modellerinin geliştirilmesi

Abstract

Kızılçam, ülkemizde orman ürünleri sanayisi için en önemli ticari ağaç türlerinden biridir. Bu çalışmada, Antalya Yöresi doğal kızılçam meşcereleri için göğüs çapı ve bazı meşcere özellikleri bağımsız değişken olarak kullanılarak çap (d)-boy (h) modelleri geliştirilmiştir. Çalışmada, toplam 16 adet genelleştirilmiş d-h modeli, Antalya Yöresi doğal kızılçam meşcerelerinden alınan 59 örnek alan verisi kullanılarak test edilmiştir. Bu amaçla örnek alan verileri iki gruba ayrılmış, bir kısmı (%85) model geliştirmek ve diğer bir kısmı da (%15) geliştirilen modellerin test edilmesi amacıyla kullanılmıştır. Geliştirilen modellerin boy tahminlerindeki performansları, altı farklı ölçüt değerleri kullanılarak karşılaştırılmış ve elde edilen sonuçlar değerlendirilmiştir. En başarılı sonuçlar sırasıyla, Pienaar (1991-II), Sloboda vd. (1993-I) ve Sharma ve Parton (2007) tarafından geliştirilen modellerle elde edilmiştir. Bağımsız veri seti kullanılarak yapılan değerlendirmede de benzer sonuçlar elde edilmiştir. Anahtar kelimeler: Kızılçam, Boy, Çap, Genelleştirilmiş modeller

Keywords

• Kızılçam, Boy, Çap, Genelleştirilmiş modeller

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