DETERMINING AN APPROPRIATE AGE FOR ESTIMATING SITE INDEX OF Acacia HYBRID PLANTATIONS IN SOUTHEASTERN VIETNAM
Downloads
This article introduces the research results of a site index classification for Acacia hybrid plantations in Dong Nai Province. The objectives of this study were to (i) determine a baseline age of Acacia hybrid plantations to establish their site indices and (ii) develop site index curves for Acacia hybrid plantations. Three standard plots were established for each age group of 1-10 years with 111 trees per plot; 108 trees were measured for the estimation of growth criteria. Three trees were used for tree truncation, and truncated trees did not count for the estimation of tree growth criteria. In this study, the site index (SI) for Acacia hybrid plantations was divided into three levels according to the total height of the dominant trees. The heights collected from 108 trees were used to build the functions of the SI, and three truncated trees were used to examine the possibilities of the functions of SI. Research results showed that the appropriate baseline age of Acacia hybrid plantations at Dong Nai Province is 8 years. The site indices of hybrid plantations were divided into three site levels of I, II, and III, corresponding to heights of 24, 20 and 16 m, respectively. To improve the effectiveness of Acacia hybrid plantation businesses, owners should focus on growing plantations at site index levels of I or II.
Bao H. 2010. Study on methodologies for estimation of the carbon stock in natural forests as a basis for calculating CO₂ emissions from degradation and deforestation in Vietnam. Vietnamese Journal of Agriculture and Rural Development. 1:1–10.
Bournan BAM, Plant RAJ, Nieuwenhuyse A. 1999. Quantifying economic and biophysical sustainability trade-offs in tropical pastures. Ecological Modelling. 120:31–46.
Brown S. 2002. Measuring carbon in forests: Current status and future challenges. Environmental Pollution. 116:363–372.
Chaiyo U, Garivait S, Wanthongchai K. 2011. Carbon storage in aboveground biomass of tropical deciduous forest in Ratchaburi Province, Thailand. World Academy of Science, Engineering and Technology.
Chambers JQ, Santos JS, Ribeiro RJ, Higuchi N. 2001. Tree damage, allometric relationships, and aboveground net primary production in central Amazon forest. Forest Ecology and Management. 152:73–84.
Chave J, Andalo C, Brown S, Cairns MA, Chambers JQ, Eamus D, Fölster H, Fromard F, Higuchi N, Kira T, Nelson BW, Ogawa H, Puig H, Riera B, Yamakura T. 2005. Tree allometry and improved estimation of carbon stocks and balance in tropical forests. Oecologia. 145:87–99.
Clutter JL, Fortson JC, Pienaar LV, Brister GH, Bailey RL. 1983. Timber Management: A Quantitative Approach. New York (US): John Wiley & Sons, Inc. 333 p.
Dong SH. 1974. Volume Curves of Forest Plants in Vietnam. Hanoi (VN): Forest Science Institute of Vietnam. 200 p.
FAO. 2009. Land: Assessment of the Status of the Development of the Standards for Terrestrial Essential Climate Variables. FAO Report No. 149. Rome (IT): Food and Agriculture Organization of the United Nations.
Institute for Forest Ecology and Environment. 2017. Results of forest inventory in Dong Nai Province in 2016. Available from: http://ifee.edu.vn/vi/news/du-an-trong-diem/ket-qua-kiem-ke-rung-tinh-dong-nai-nam-2016-64.html
IPCC (Intergovernmental Panel on Climate Change). 2000. Land Use, Land-use Change, and Forestry: A Special Report of the IPCC. Cambridge (UK): Cambridge University Press.
Krisnawati H, Wang Y, Ades PK. 2010. Generalized height–diameter models for Acacia mangium Willd. plantations in South Sumatra. Indonesian Journal of Forestry Research. 7(1):1–19.
Larsen DR. 1999. Site index and construction of site index equations for Pinus sylvestris L. using permanent plot data in Sweden. Columbia (US): School of Natural Resources, University of Missouri–Columbia.
Le DK. Acacia hybrid species and its soil improvement ability. Vietnamese Journal of Forestry. 6.
RIC; Sco YO; Son YIM; Doyog ND; Lee YJ. 2018. Height–age model and site index curves for Acacia mangium and Eucalyptus pellita in Indonesia. Forest Science and Technology. 14(2):91–96.
Monserud RA. 1984. Height growth and site index curves for inland Douglas-fir based on stem analysis data and forest habitat type. Forest Science. 30:943–965.
Nguyen HS, Nguyen VT, Bui TH, Nguyen TNI, Phan NIS. 2006. Study on growth characteristics of Acacia hybrid plantations and their maturity age in Southern Vietnam. Vietnamese Journal of Forest Sciences. 4.
Nguyen VL. 2012. Biomass estimation for calculating carbon stocks and CO₂ absorption in Yok Don National Park, Central Highlands, Vietnam, using remote sensing technology. Journal of Vietnam Environment. 3:14–18.
Nguyen NL, Dao CK. 1999. Study on Growth and Productivity of Pinus kesiya Royle ex Gordon in Vietnam. Hanoi (VN): Vietnam Publishing House of Agriculture. 207 p.
Nguyen VT, Tran TN. 2016. Biomass functions and adjusted coefficients for Pinus kesiya Royle ex Gordon at site index level I in Duc Trong District, Lam Dong Province. Vietnamese Science Journal of Agriculture and Forestry. 2:57–65.
Nguyen VP, Tran QB, La NK. 2020. Economic and social efficiency of Acacia hybrid plantations in Dong Nai Province. Vietnamese Journal of Forest Technology and Sciences. 3:105–112.
Onyekwelu JC. 2003. Choosing appropriate index age for estimating site index of Gmelina arborea timber plantations in the Oluwa Forest Reserve. Journal of Food, Agriculture & Environment. 1.
Vien NN. 2003. Study on Biomass and Primary Productivity of Avicennia alba in Can Gio Biosphere Reserve, Ho Chi Minh City. Hanoi (VN): Forest Science Institute of Vietnam. 172 p.
Vietnam Standard (TCVN) 11567-1:2016. 2016. Plantation – Large Timber Plantation Transformed from Small Wood – Part 1: Acacia Hybrid (A. mangium × A. auriculiformis). Available from: http://luattrongtay.vn/ViewFullText/Id/664433f
Vu TH. 2005. Forest Productivity. Hanoi (VN): Vietnam Publishing House of Agriculture.
Vu TH. 2012. Volume Chart of Standing Trees. Hanoi (VN): Vietnam Publishing House of Agriculture. 212 p.
Vu TP, V DIL. 2011. Biomass structure of pine plantations in Lam Dong Province. Vietnamese Journal of Forest Science. 2:1813–1827.
Zianis D, Muukkonen P, Mäkipää R, Mencuccini M. 2005. Biomass and stem volume equations for tree species in Europe. Monographs. 4. 63 p.
Copyright (c) 2020 BIOTROPIA - The Southeast Asian Journal of Tropical Biology
This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.
Authors who publish with this journal agree with the following terms:
- Authors retain copyright and grant the journal right of first publication, with the work 1 year after publication simultaneously licensed under a Creative Commons attribution-noncommerical-noderivates 4.0 International License that allows others to share, copy and redistribute the work in any medium or format, but only where the use is for non-commercial purposes and an acknowledgement of the work's authorship and initial publication in this journal is mentioned.
- Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.
- Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).
