Sains Malaysiana 46(3)(2017): 381–386

http://dx.doi.org/10.17576/jsm-2017-4603-04

Determining Optimum Cutting Ages Including Timber Production and Carbon Sequestration Benefits in Turkish Pine Plantations

(Menentukan Umur Tebangan Optimum Termasuk Pengeluaran Kayu Balak dan Manfaat Pensekuesteran Karbon di Ladang Pine Turki)

SEDAT KELEŞ*

Çank?r? Karatekin University, Faculty of Forestry, 18200, Çank?r?-Turkey

Diserahkan: 23 Disember 2015/Diterima: 3 Ogos 2016

ABSTRACT

This study presents the optimum cutting ages in Turkish pine (Pinus brutia Ten.) plantations including timber production and carbon sequestration values in Turkey. Four different growing spaces are considered. The study also evaluates the effects of different discount rates and carbon prices on the optimum cutting ages using net present value approach. The growth and yield curves, biomass equations and carbon conversion factors as well as forest plantation costs and timber assortments revenues for Turkish pine plantations are used to determine the optimum cutting ages. The results of the case study showed that the integration of carbon sequestration benefits into timber production increased the optimum cutting ages of Turkish pine plantations for each growing spaces in order to sequester more carbon. The optimum cutting ages decreased depending on the increase in discount rates. When carbon prices increased the optimum cutting ages also increased.

Keywords: Climate change; cutting age; forest management; forest values; net present value

ABSTRAK

Kajian ini membentangkan umur tebangan yang optimum di ladang pain Turki (Pinus brutia Ten.) termasuk nilai pengeluaran kayu dan pensekuesteran karbon di Turki. Empat ruang pertumbuhan berbeza diambil kira. Kajian ini juga menilai kesan perbezaan kadar diskaun dan harga karbon pada umur memotong optimum menggunakan pendekatan nilai bersih terkini. Faktor lengkung pertumbuhan dan hasil, persamaan biojisim dan penukaran karbon serta kos ladang hutan dan pelbagai hasil kayu untuk ladang pain Turki digunakan untuk menentukan umur tebangan yang optimum. Keputusan daripada kajian kes menunjukkan bahawa manfaat integrasi pensekuesteran karbon ke dalam pengeluaran kayu meningkatkan umur tebangan optimum ladang pain Turki bagi setiap ruang pertumbuhan untuk sekuester karbon yang lebih banyak. Umur tebangan optimum menurun bergantung kepada peningkatan dalam kadar diskaun. Apabila harga karbon meningkat, umur optimum juga meningkat.

Kata kunci: Pengurusan hutan hutan nilai; perubahan iklim; nilai kini bersih; umur memotong

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*Pengarang untuk surat-menyurat; email: dr.sedatkeles@gmail.com