Toros Göknarı (Abies cilicica Car.)’nda Yaprak Alan İndeksinin Belirlenmesi: Adana Kozan Yöresi Örneği

Yaprak alan indeksi (YAİ), orman ekosistemlerinin temel yapısal karakterlerinin ortaya konmasındaönemli araçların başında gelmektedir. Çünkü YAİ meşcerenin tepe çatısında oluşan birçok biyolojik vefiziksel sürecin değişimini ortaya koyabilmektedir. Bu bağlamda, YAİ değerlerinin belirlenmesiormancılık açısından önem taşımaktadır. YAİ’nin hesaplanmasında doğrudan ve dolaylı birçok yöntemkullanılmaktadır. Bu çalışmada doğrudan belirlenme yöntemi kullanılmıştır. Bunun için farklı bakılarda,aynı yükseklik ve eğim ile yaklaşık aynı kapalılıkta (0.9-1.0) meşcerelerden toplam 45 adet ağaçtanalınan 180 sürgünde ölçümler yapılmıştır. Buna göre kuzey ve güney olarak farklı bakılardan alınanağaçlarda yapılan YAİ değerleri farklı (güney bakılardaki ağaçlarda x ̅=1.892 (σ = 0.971) ve kuzeybakılardaki ağaçlarda x ̅=2.21 (σ = 0.93) bulunmuştur. YAİ değerleri kuzey bakıdan alınan örneklerdedaha yüksek çıkmıştır. Bu sonuç, silvikültürel müdahalelerin yapılacağı meşcereler aynı meşcereyapısında olsa dahi farklı şiddette uygulamaların yapılması gerektiğini teyit etmektedir.

Determination of Leaf Area Index in Taurus Fir (Abies cilicica Car.): Case Study of Adana-Kozan

Leaf area index is one of the most important factors in presenting the basic structural characteristics of forest ecosystems. Because, leaf area index can reveal the change of many biological and physical processes in the canopy. So, determination of the leaf area index is very important in forestry. In calculation of the leaf area index many direct and indirect methods are used. In this study direct method was used in calculation. For this purpose, measurements were made in 180 shoots taken from a total of 45 trees from different stands at the same altitude, aspect and have the same slope gradient and approximately same canopy closure (0.9-1.0). Obtained results showed that leaf area index was higher in the samples taken from North aspect (x ̅=2.21 (σ = 0.93)) then South ( x ̅=1.892 (σ = 0.971)). Obtained results indicated that silvicultural treatments at different intensity should be carried out even if the stands were in the same stand structure.

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