Determining the Economically Optimal Harvesting Age of Loblolly Pine (Pinus taeda) in Guilan Province

Subject Areas : natural resorces

Mostafa Adibnezhad ¹ (M.Sc graduated student, Department of Forestry, Faculty of Natural Resources, University of Guilan, Sowmeh Sara, Iran. *(Corresponding Author))
Soleiman Mohammadi Limaei ² (Professor, Department of Forestry, Faculty of Natural Resources, University of Guilan, Sowmeh Sara, Iran .)

Received: 2016-11-29 Accepted : 2017-03-01 Published : 2020-05-21

Keywords: total production, Guilan, rotation age, Net Present Value,

Abstract :

Background and Objective: The aim of present study was to determine the economically optimal harvesting age of Loblolly Pine (Pinus taeda) in Guilan Province. Loblolly pine is one of the fast growing species that had successful growth in plantation at Guilan province. Method: For this purpose, growth data and the stumpage price of loblolly pine were used. Regression analysis was used to determine the most suitable growth model for loblolly pine. Findings: The results showed that the best relationship between volume growth per hectare and age is a third order polynomial growth model. The equation for the price of loblolly pine stumpage was estimated based on an autoregressive model. Due to the insignificancy of this relationship at the significance level of 0.05, the average stumpage price was used for various years as an estimation of stumpage price. According to the stumpage price, annual growth and interest rate, the optimal age of loblolly pine was determined based on technical and economic criteria. Discussion and Conclusion: Results showed that economically optimum harvesting age of loblolly pine varies with different discount rates.

References:

1. Food and agriculture organization of the United Nations (FAO). 2007.  FRA 2005- Key findingshttp://www.fao.org/forestry/site/32246/en last accessed February, 2007.


2. Tufekcioglu,Y., Zeki, H., and Yilmaz, M. 2005. Effects of some soil properties on the growth of hybrid poplar n the Terme-Golardi region of Turkey. Turkish Journal of Agriculture andForestry, 29:221.


3. Daneshvar, H. A., Modirrahmati, A.R. and Feizi, M.T.  2009.   Growth characteristics of different Poplar clones in the selection nurseries


4. in Esfahan province. Forest and Poplar Research. 17( 1): 10-24.Booth,TH., and ­­Jovanovic,T. 2002. A new world climatic mapping program to assist species selection.ForestEcology andManagement,189:97-110.


5. Carle, J., and Holmgren, P. 2008. Wood from planted forests: a globaloutlook 2005-2030. Forest Products Journal, 58(12): 6-18.


6. Gorji Bahri, Y. M. 1993. Study the growth of Pinustaeda in Gilan, Pajouhesh-va-Sazandegi. 20: 34-37.


7. Bryant, D., Daniel, N., and Laura, T. 1997. The last frontier forests. Ecosystems and economics on the edge. World Resources Institute. Washington. 42pp.


8. Mohammadi A., Moairi, H and Heidari, H. 2012. Determination of the absolute harvesting age of Paulownia even-aged stands in Dr. Bahramnia's Forest Management Project. Iranian Journal of Forest and Poplar Research, 20( 3): 401-393.


9. Posavec. S., Beljan. K., Krajter. S,. and Persun, D. 2012. Calculation of economic rotation period for even-aged stand in Croatia. South-East European Forestry. Professional Paper. 5pp.


10. Jones,  PD., Grado, SC and Demarais, S. 2010. Financial analysis of intensive pine plantation establishment. Journal of Forest Economics, 16:101–112.


11. López Torres, I., Ortuño Pérez, S., Martín Fernández, A., and FullanaBelda, C. 2010. Estimating the optimal rotation age of Pinusnigra in the Spanish Iberian System applying discrete optimal control. Forest Systems. 19(3): 306-314.


12. Parajuli, R. 2005. Carbon sequestration and uneven-aged management of loblolly pine stands in the southern USA: a joint optimization approach. MS Thesis of Renewable Natural Resources, Louisiana State University, 53pp.


13. Petráš, R.,  Mecko. J., and Kadunc. A. 2010. Felling maturity criteria of beech stands in Slovakia. Zbornik gozdarstva in lesarstva. 92 : 39–48.


14. Gregory, R. 1987. Resource Economics For Foresters. John Wiley & Sons, Inc. U.S.A. 457pp.