Simulating Harvest Schedule for Timber Management and Multipurpose Management in Teak Plantations
Abstract: Sustainable
management of teak plantations in Java requires an improvement of the existing
yield regulation method to optimize multiple benefits of the plantations at
risk of stand destruction. This study was therefore aimed to formulate an
alternative harvest scheduling model that integrates risk of stand destruction
for supporting multipurpose management of teak plantations. The proposed model
used a state-space planning model to simulate the dynamic of plantations due to
timber harvesting and stand destruction, and then sought optimal solutions for
two management scenarios, i.e. timber management that optimized total harvest
volume and multipurpose management that optimized net present value (NPV) while
increasing carbon stocks. Using a case study on a typical teak plantation, this
study confirmed that increasing destruction rates reduced harvest volumes, NPV,
carbon stocks, and resulted in imbalanced ending age-class structures. Reducing
cutting-age limit increased harvest volumes and NPV, but it also reduced carbon
stocks of the plantations. Although the multipurpose management generated lower
financial benefit, it maintained carbon stocks and produced better ending
age-class structures compared to timber management. The proposed harvest
scheduling model provides a useful planning tool for managing teak plantations.
Author: Tatang Tiryana
Journal Code: jpkehutanangg160001