Joint production of wood, resin, and carbon from pine plantation forest in Java

Abstract

Pine (Pinus merkusii) plantation forest has been developed in Java Island under Perhutani management with clear-cutting and artificial regeneration silviculture system. The main products of pine plantation forests are wood and resin. Although the Indonesian government has committed to reduce the greenhouse gases (GHGs) emission for 26% by 2020 with voluntary efforts, pine plantation forest may contribute to reduce GHGs emission through enhancing carbon stock. The additional income from carbon sales might or might not change the optimal rotation of the pine forest. This study aims to analyze the effects of additional income from resin and carbon benefits on the optimal rotation of pine plantation forest in Java. The modified Faustmann model is used to determine the optimal rotation. The results of this study show that (1) the inclusion of resin benefits may lengthen the optimal rotation age, (2) the optimal rotation of timber and resin production of pine forest in Java for size class III, IV, V, and VI are 34, 33 32, and 30 years respectively, (3) additional income from carbon sales may increase carbon stock by 8%, and lengthen optimal rotation for 3 years. Perhutani may change the optimal rotation due to additional benefits from resin and carbon.