Study on silvic characteristics of Prunus arborea (Blume) Kalkman species in Na Ri district, Bac Kan provin
Keywords:
Bac Kan, Prunus arborea (Blume) Kalkman, silvic characteristicsAbstract
Na Ri district, Bac Kan province is an area suitable for the development of saw log production areas. Prunus arborea is a native species which has potential for saw log plantation forest. The purpose of the study is to provide scientific data on characteristics of some ecological factors; distribution characteristics of Prunus arborea species; forest characteristics where Prunus arborea trees are distributed. On the basis of secondary data, interview and field surveys (27 plots), results showed that: in Na Ri district, Prunus arborea species were distributed on yellowish red soils (Fs.). The soil is was derived from clay rocks, sloping terrain, the texture varies from medium loam to clay. The annual temperature is 20.9 oC, the annual sunshine is 1499.8 hours per year, the annual rainfall is 1076.6mm per year. Prunus arborea species is distributed mainly in the medium forest and poor forest, altitude level in between 308 and 456m above sea level, slope level between 20o and 35o. Tree species composition ranged from 13 - 32 species and 6 to 8 species that participated in composition formula. The woody species in composition formula are mainly photophilic with low values timber, such as: Castanopsis indica, Machilus spp., Schima wallichii, Canarium tonkiense, Liquidambar formosana, Vernicia fordii, Zenia
insignis, Lithocarpus spp., Garcinia oblongifolia; In addition, there are some valuable timber species, such as: Prunus arborea and Allospondias lakonensis, especially in the medium forest status, Prunus arborea species has a large species composition coefficient. Prunus arborea distribute in poor forest with canopy coverage is 0.57 and the canopy coverage is 0.7 in medium forest.
References
1. Bộ NN&PTNT, 2006. Quyết định số 4018 QĐ/BNN-KHCN ngày 29/12/2006, ban hành tiêu chuẩn ngành (04 TCN 126-2006) Hướng dẫn kỹ thuật trồng cây gỗ lá rộng dưới tán rừng trồng để cung cấp gỗ lớn.
2. Bộ NN&PTNT, 2013. Quyết định số 1565/QĐ-BNN-TCLN ngày 08/7/2013, Phê duyệt “Đề án tái cơ cấu ngành Lâm nghiệp”.
3. Phạm Hoàng Hộ, 1999. Cây cỏ Việt Nam, tập 1, tr. 806, Nxb. Trẻ
4. Nguyễn Hoàng Nghĩa, 2012. Átlát cây rừng Việt Nam, tập 4, Nxb. Nông nghiệp.
5. Sở Tài nguyên và môi trường tỉnh Bắc Kạn, 2015. Điều tra thoái hóa đất tỉnh Bắc Kạn, Báo cáo tổng hợp kết quả dự án, Bắc Kạn, 156 trang.
6. Curtis J. T. and McIntosh R. P., 1951. “An upland forest continuum in the Prairie - Forest border region of Wisconsin”. Ecology, Vol. 32, No. 3, (Jul., 1951), pp. 476 - 496 (Available at: http://www.jstor.org/stable/1931725).
7. Kalkman C., 1993. Rosaceae. - In: van Steenis C.G.G.J. (ed.), Flora Malesia, series 1: Spermatophyta, vol. 11 (2): 227 - 351. Leiden University, Leiden.
8. Shannon, C.E. & W. Wiener, 1963. The Mathematical Theory of Communication. University of Illinois Press, Urbana.
9. Lim S.C. & Gan K.S., 2009. Identification and Utilization of Lesser - Known Commercial Timbers in Peninsular Malaysia 12; Pagar Anak, Pepauh, Pepijat and Pepulut, Timber Technology Bulletin No. 49.
10. Brown D., 1995. Encyclopaedia of Herbs and their Uses. Dorling Kindersley, London.
