Analysis on the Growth Rhythm and Cold Tolerance of Five-Year Old Eucalyptus benthamii Plantation for Bioenergy

Aihua Yu¹, Tom Gallagher^2*

¹Department of Forest Engineering, Nanjing Forestry University, Nanjing, China.
²School of Forestry and Wildlife Sciences, Auburn University, Auburn, AL, USA.

DOI: 10.4236/ojf.2015.56052                

Abstract

A research plot of Eucalyptus benthamii was planted to evaluate this species’ ability to supply the emerging bioenergy markets that are developing in the southern U.S. The plot was planted in two different densities to investigate the growth parameters and the cold tolerance. The stand was measured annually through five growing seasons. The results indicated that the growth difference among the young E. benthamii was noticeable. For example, the maximum and minimum value of five-year old trees at diameter breast height (DBH) was 27.9 centimeters and 1.27 centimeters; and the maximum and minimum value of tree height was 22.86 meters and 2.44 meters, respectively. The yearly change in DBH and height of E. benthamii had significant differences. The average annual survival rates of E. benthamii had differences under the two planting densities (1650 trees ha^-1 and 1237 trees ha^-1). The densities also had effects on the height and DBH growth of E. benthamii. The average DBH and height of 1650 trees ha^-1 plantation were 11.18 centimeters and 15.03 meters, and the average DBH and height of 1237 trees ha^-1 plantation were 13.46 centimeters and 16.28 meters. The volume per hectare of 1650 trees ha^-1 and 1237 trees ha^-1 plantation were 111.45 cubic meters and 101.15 cubic meters, respectively. Average diameter growth was almost 2.54 centimeters per year and average height growth was over 3 meters. E. benthamii plantations were considered tolerant to -7.4 degrees Celsius and a cold spell during early 2014 (-11.3 degrees Celsius for two consecutive nights) killed the plantation. The growth of E. benthamii also varied depending on surrounding conditions. The difference in growth of row seven versus row one was a good example. The reason probably was that row seven was adjacent to a loblolly pine plantation and row one was next to an open field.

Keywords

Eucalyptus benthamii, Growth Parameters, Bioenergy, Cold Tolerance

Conflicts of Interest

The authors declare no conflicts of interest.

References

[1]	Abbasi, T., & Abbasi ,S. A. (2010). Biomass Energy and the Environmental Impacts Associated with Its Production and Utilization. Renewable and Sustainable Energy Reviews, 14, 919-937. http://dx.doi.org/10.1016/j.rser.2009.11.006
[2]	Balozi, K. B., Kimani, G., Senelwa, K., Etiegni, L., Mbelase, A., & Muchiri, M. (2010). Five Year Growth and Survival of Eucalyptus Hybrid Clones in Coastal Kenya. JMHT, XVI, 1-9.
[3]	BORéM, A. (2007). Biotecnologiaflorestal. Vicosa: Suprema.
[4]	Brown, C. (2000). Global Forest Products Outlook Study: The Future Supply of Wood from Plantations. Rome: Forestry Policy and Planning Division, FAO.
[5]	Chen, J. Z. (2007). The Growth Rhythm of Young Plantations of Eucalyptus dunnii. Journal of Fujian College of Forestry, 27, 88-91.
[6]	Dougherty, D., & Wright, J. (2010). Financial Evaluation of Eucalypt Bioenergy Plantation in the Southeastern United States. Forest Landowner, 69, 26-30.
[7]	Doug, B., & Lyn, M. L. (1998). Ecology of Sydney Plant Species: Part 6, Dicotyledon Family Myrtaceae. Cunninghamia, 5, 809-987.
[8]	Dougherty, D., & Wright, J. (2012). Silviculture and Economic Evaluation of Eucalypt Plantations in the Southern US. BioResources, 7, 1194-2001.
[9]	Douglas, B. J., Brooker, M. I. H., Chippendale, G. M., & McDonald, M.W. (2006). Forest Trees of Australia. Collingwood, VA: CSIRO Publishing, 396.
[10]	Fan, W. B., Zhao, C. J., Lin, Z., & Chen H. (2013). Growth Characteristics of Eucalyptus Plantation and Their Responses to Climate Environment in Western Hainan Island. Forest Resources Management, 4, 77-82.
[11]	Gonzalez, R., Treasure, T., Phillips, R., Jameel, H., Saloni, D., Abt, R., & Wright, J. (2011). Converting Eucalyptus Biomass into Ethanol: Financial and Sensitivity Analysis in a Co-Current Dilute Acid Process. Part II. Biomass and Bioenergy, 35, 767-772. http://dx.doi.org/10.1016/j.biombioe.2010.10.025
[12]	Spinelli, R., Ward, S. M., & Owende, P. M., (2009). A Harvest and Transport Cost Model for Eucalyptus spp. Fast-Growing Short Rotation Plantations. Biomass and Bioenergy, 33, 1265-1270. http://dx.doi.org/10.1016/j.biombioe.2009.05.010
[13]	Su, H. J., Zhao, F., & Li, H. G., (2005). Growth Rules of Pinus sylvestris var. Mongolica on Sandy Land. Protection Forest Science and Technology, 68, 12-13.
[14]	Yang, Z. J., Xu , D. P., Chen, W. P., Huang, L. J., Li, S. J., & Chen, Y. (2009). Growth Effect of Eucalyptus-Acacia Mixed Plantation in South China. Chinese Journal of Applied Ecology, 20, 2339-2344.