Relationships Between Leaf Area Index (LAI) and Some Stand Properties in Turkish Red Pine and Black Pine stands

Year 2015, Volume: 15 Issue: 1, 78 - 85, 18.06.2015

Ali Kemal Özbayram , Emrah Çiçek Faruk Yılmaz

https://doi.org/10.17475/kuofd.23267

Cited By: 2

Abstract

Leaf are index (LAI) which is commonly used for analyzing of canopy cover and a direct measurement of active leaf area is closely related to forest and site productivity. Various methods have been developed for the estimation of LAI. Recent years, hemispherical photograph that is one of the methods of LAI estimation has been used frequently. This study investigates the relationships between LAI and stand age, mean diameter, density, top height, green tree height, basal area and litter in Turkish red pine and black pine stands in Bozdağ region, Denizli. The measurements were carried out in 39 systematic sampling plots 24 of which in Turkish red pine and 15 in black pine stands. LAI values which calculated via the hemispherical photographs ranged between 0.77 and 2.56 m2 m-2and between 0.78 and 4.66 m2 m-2 in Turkish red pine and black pine stands respectively. Regression analysis results revealed there are positive correlations between LAI value and stand age, mean diameter, top height, green tree height, basal area and litter in Turkish red pine whereas LAI value in black pine stand has negative correlation with stand age and mean diameter. Based on our results, changes of stand type are nearly effect on LAI and the correlations between LAI and some stand properties vary according to the species

Keywords

Hemispherical photographs, Leaf area index, LAI, Pinus brutia, , Pinus nigra

Kızılçam ve Karaçam Meşcerelerinde Yaprak Alanı İndeksi (YAİ) ile Bazı Meşcere Özellikleri Arasındaki İlişkiler

Abstract

Meşcere çatısının analizinde sıklıkla kullanılan ve aktif yaprak yüzey alanının doğrudan bir ölçüsü olan yaprak alanı indeksi (YAİ), orman ekosistemi dinamiği ve verimlilikle yakından ilişki içerisindedir. YAİ değerinin kestirilmesinde değişik yöntemler geliştirilmiştir. Son yıllarda bu yöntemlerden biri olan yarı-küresel fotoğraflar sıklıkla kullanılmaktadır. Bu çalışmada Bozdağ (Denizli) yöresindeki kızılçam ve karaçam meşcerelerinde YAİ ile meşcere dinamiğinin belirlenmesinde sıklıkla kullanılan yaş, orta çap, ağaç sayısı, üst boy, göğüs yüzeyi (GY), dallı gövde yüksekliği (DGY) ve ölü örtü (ÖÖ)kalınlığı gibi önemli meşcere parametreleri arasındaki ilişkiler incelenmiştir. Kızılçamda 24 adet (299 ha), karaçamda 15 adet (171 ha) sistematik örnek alanda ölçümler gerçekleştirildi. Dijital yarı-küresel fotoğraflar yardımıyla elde edilen YAİ değeri kızılçamda 0.77-2.56 m2 m-2 (ort. 1.59 m2 m-2), karaçamda 0.78-4.66 m2 m-2 (ort.1.70 m2 m-2) değişen aralıkta bulundu. Regresyon analizine göre, YAİ değeri kızılçamda yaş, orta çap, üst boy, GY, DGY, ÖÖ arasında pozitif yönde, karaçamda ise sadece yaş ve orta çap ile negatif yönde anlamlı ilişkiler gösterdi. Araştırma sonuçları, benzer yetişme ortamında bulunan farklı türlerin meşcere tiplerinin YAİ üzerinde etkili olduğunu ve YAİ ile ölçülen meşcere özellikleri arasındaki ilişkinin türlere göre değişebileceğini göstermektedir.

Keywords

Karaçam, Kızılçam, Yaprak alan indeksi, YAİ, Yarı-küresel fotoğraf

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