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Journal of Environmental Biology

pISSN: 0254-8704 ; eISSN: 2394-0379 ; CODEN: JEBIDP

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    Abstract - Issue Sep 2010, 31 (5)                                     Back


abstract_01

Growth response of Lebanon cedar (Cedrus libani ) plantations

to thinning intensity in western Turkey

 

Serdar Carus* and Yilmaz Catal

Department of Forest Management, Faculty of Forestry, University of Suleyman Demirel, 32260 Cunur, Isparta, Turkey

(Received: September 22, 2008; Revised received: March 27, 2009; Accepted: April 09, 2008)

 

Abstract: This paper presents the growth response of 25 yr old Lebanon cedar (Cedrus libani A. Rich.) plantation to thinnings of different intensities in Isparta in western Turkey. The thinning intensity was measured by using the residual basal area (%) as parameter. In spring of 2005, three treatments were tested; light, moderate and heavy thinning with respectively 10, 25 and 35% of basal area removed. The statistical design of the experiment was a randomized incomplete block with two blocks and three treatments. Variables such as diameter at breast height (diameter) and height were measured. Growth rate ratios of diameter in moderately thinned and heavily thinned stands were 1.02 and 1.03, respectively. Basal area growth rates in moderately thinned and heavily thinned plots were 0.93 and 1.05, respectively. The largest values for the mean tree were observed with the heaviest thinning treatment. Absolute diameter increment was positively correlated with initial diameter in all plots. Relative diameter growth was negatively correlated with initial diameter. Growth rate interpretations were supported by analysis of variance using Duncan?s test of range multiple. The results obtained show significant differences between treatments for tree height growth, for the two inventories carried out (2005, 2008). However, diameter, basal area and volume were no found between treatments for tree.

Key words: Lebanon cedar, Stand growth, Thinning intensity, Tree growth

??????? PDF of full length paper is available online

 

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