Analysis of the effect of structural changes on resin production potential in turkish pine stands

This study explores the impact of structural variables on resin production in Turkish Pine (Pinus brutia Ten.) stands. Turkish Pine is a significant tree species widely found in Turkey, and its resin is an important non-wood forest product. The study aimed to analyze the effect of structural changes such as average diameter, height, breast height area, tree volume, and leaf area index on the resin production potential in Turkish Pine stands across different ages and canopy closure classes. Sample plots were established in these stands, and resin production was measured using both bark streak tapping and bore hole methods, with resin collected biweekly over a year. In total, resin collection was performed on 389 trees using the bark streak tapping method and 369 trees using the bore hole method across 54 sample plots, including 27 for each method. The research found that the period from May to October is the most suitable for resin production and that average diameter has a more significant effect on resin yield compared to other stand parameters. Additionally, a relationship was established between variables such as stand average diameter, number of trees, and number of wounds with resin yield based on field data and statistical calculations, leading to the development of an equation representing this relationship. This equation offers a practical tool for calculating resin yield in Turkish Pine stands. The study provides important insights on managing stand structural characteristics to maximize resin production, which is valuable for forest management and planning.