Evaluation of first thinning in brutian pine (Pinus brutia Ten.) stands: A case study in Sütçüler

Abstract

This study was carried out to evaluate the influence of thinning on natural Brutian pine (Pinus brutia Ten.) stands in Isparta/Sütçüler Forestry Management Directorate. The effect of the four-year results of thinning on the growth characteristics of Brutian pine stands was evaluated at two different levels applied in two different areas at similar elevation. Moderate thinning was performed in area I, and heavy thinning was performed in area II. Thinning applied in Brutian pine stands in both areas had an effect on mean diameter at breast height, tree height, tree stability and total basal area. Tree stability, diameter and height growth of trees increased with the thinnings applied. At the end of four years, no significant difference was determined between the areas where thinnings was applied and the control areas in terms of the total volume per hectare in both areas. As a result, heavy thinning may be preferred as the first thinning in areas where regular maintenance is applied in natural Brutian pine stands. In areas where regular maintenance is not applied, moderate thinning can be applied considering the development of the stand.

Keywords

• thinning
• basal area
• brutian pine
• volume
• stability
• aralama
• göğüs yüzeyi
• kızılçam
• hacim
• stabilite