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ŠUMARSKI LIST 9-10/2017 str. 27     <-- 27 -->        PDF

PRODUCTIVITY ASSESSMENT OF ALTERNATIVE TIMBER DEBARKING METHODS
PROCJENA PRODUKTIVNOSTI ALTERNATIVNIH METODA KORANJA DRVNOG SORTIMENTA
Neºe GÜLCI, Abdullah E. AKAY, Orhan ERDAª
Summary
In Turkey, timber debarking stages are generally carried out by using axes. However, this method takes a lot of time and requires more work forces. In addition, since leaving residual trees with bark in stands increases the risk of insect damages, residual trees require quick barking process. In recent years, chainsaw mounted debarking tools have been widely used in debarking stages due to performing jobs quicker with less labor force. In this study, two different debarking methods including using axes and debarking tool were analyzed by considering operation productivity. The field studies were conducted in Brutian Pine (Pinus brutia Ten.) stand located in Bahçe Forest Enterprise Chief of Osmaniye Forest Enterprise Directorate in Adana Regional Forestry Directorate. As a result of study, the productivity of chainsaw mounted debarking tool was found to be five times higher than that of using axes for debarking. Thus, use of chainsaw mounted debarking tool is better alternative than use of axe in debarking activities, as it takes less time and minimize physical work load of the loggers.
KEY WORDS: Forest operations, debarking activity, chainsaw mounted debarking tool, debarking productivity
INTRODUCTION
UVOD
In Turkey, timber harvesting operation is consisted of series of successive activities including felling, bucking, debarking, wood extraction, loading, transportation, unloading, and timber stacking (Eker and Acar, 2006; Erdaº et al., 2014; Gülci, 2014). According to legal regulations, especially coniferous trees must be debarked just after felling stage (OGM, 1996). Thereby, organic material is to be kept inside the forest, and the amount of transported load is reduced by approximately 30% (Eker et al., 2011). Especially, barks are preferably left in the stand due to limited usage opportunities of the barks in forest industry in Turkey (Acar et al., 2015). For this reason, in timber extraction with a consumer-wise sale idea, producer carry out stump-site debarking process without encountering any problems during furniture production and any financial loss in forestry industry (Marshall et al. 2006).
Although debarking studies do not appear as of the primary stages in timber extraction operations, it received great importance by means of research and evaluation in ecological and economic dimension (Magaggnotti et al. 2011; Gavrilov et al. 2016). Debarking is described as using various methods to remove tree barks from the trunk (Gürtan,