Moisture Content Variation in Kiln-Dried Lumber from Plantations of <i>Vochysia Guatemalensis</i>
Keywords:Fast-growth plantations, tropical species, wood quality, wet pockets
AbstractVochysia guatemalensis is planted across large areas of Latin America; however, a major problem with its use is the large variation in final moisture content (MCf) after drying. This research studied the causes for high moisture content variation. Variables included the climate in which the tree was grown, the amount of heartwood, grain pattern within the piece, sample distance from the pith, and height of the log. The results showed that the initial moisture content (MCi) ranged 110-280% and MCf 10-17%. The variation in MCi was attributed to climatic conditions, heartwood presence, grain pattern, and height of the log. Boards with a radial surface in width produced the highest MCf. The MCf of lumber tended to increase with distance from the pith, and sapwood had lower MCf than heartwood. V. guatemalensis produced wet pockets in 42% of the dried boards.
Anon (2001) Dry kiln operator's manual handbook. Ag Handb 188. USDA For Serv Forest Prod Lab, Madison, WI.nASTM (2003) D 4442-92. Standard test methods for direct moisture content measurements of wood and wood-based materials. American Society for Testing and Materials, West Conshohocken, PA.nBoone RS, Kozlik CJ, Bois PJ, Wengert EM (1988) Dry kiln schedules for commercial woods—Temperate and tropical. Gen Tech Rep FPL-GTR-57 USDA For Serv Forest Prod Lab, Madison, WI. 158 pp.nButterfield RP, Crook RP, Adams R, Morris R (1993) Radial variation in wood specific gravity, fiber lengths and vessel area for two Central American hardwoods: Hyeronima alchornoides and Vochysia guatemalensis natural and plantation-grown trees. IAWA J 14:153-162.nCai Y, Hayashi K (2007) New monitoring concept of moisture content distribution in wood during RF/vacuum drying. J Wood Sci 53:1-4.nCalvo-Alvarado JC, Arias D, Ritcher DD (2007) Early growth performance of native and introduced fast growing tree species in wet to sub-humid climates of the southern region of Costa Rica. For Ecol Mgmt 242:227-235.nCoutts MP, Rishbeth J (1977) The formation of wetwood in grand fir. Eur J Forest Pathol 7:13-22.nFPL (1999) Wood handbook: Wood as an engineering material. Gen Tech Rep FPL-GTR-113. USDA For Serv Forest Prod Lab, Madison, WI. 463 pp.nGonzález D, Fisher R (1998) Variation in selected wood properties of Vochysia guatemalensis from four sites in Costa Rica. Forest Sci 44:185-191.nGu H, Young TM, Moschler WW, Bond BH (2004) Potential sources of variation that influence the final moisture content of kiln-dried hardwood lumber. Forest Prod J 54(11):65-70.nHealth Science Center (2009) Image tools. Texas University-San Antonio. http://ddsdx.uthscsa.edu/dig/download.html'>http://ddsdx.uthscsa.edu/dig/download.htmlnLlach L (1971) Propiedades físicas y mecánicas de ciento trece especies maderables de Panamá. Parte 3: Laboratorio de Productos Forestales. Universidad de Costa Rica, San José, Costa Rica. 130 pp.nMöttönen V (2006) Variation in drying behavior and final moisture content of wood during conventional low temperature drying and vacuum drying of Betula pendula timber. Drying Technol 24:1405-1413.nMoya R, Leandro L, Murillo O (2009) Wood characteristics of Terminalia amazonia, Vochysia guatemalensis and Hyeronima alchornoides planted in Costa Rica. Revista Bosques 30:78-87.nMoya R, Muñoz F (2008) Wet pockets in kiln-dried Gmelina arborea lumber. J Trop For Sci 20:48-56.nMoya R, Muñoz F (2010) Physical and mechanical properties of eight species growing in fast-growth plantations in Costa Rica. J Trop For Sci 22(3):317-328.nMoya R, Urueña E, Muñoz F (2008) Modulation of moisture content in conventional kiln of wood from fastgrowing tropical species in plantation. Paper AP-7, 7 pp. In Proc 2008 SWST International Annual Convention, November 10-12, 2008, Concepcion, Chile. Society of Wood Science and Technology, Madison, WI. ISBN #978-0-9817876-0-2.nMuñoz F, Moya R (2008) Moisture content variability in kiln-dried Gmelina arborea wood: Effect of radial position and anatomical features. J Wood Sci 54:318-322.nOfori J, Brentuo B (2005) Green moisture content, basic density, shrinkage and drying characteristics of the wood of Cedrela odorata grown in Ghana. J Trop For Sci 17:211-223.nSkaar C (1972) Water in wood. 1st ed. Syracuse University Press, Syracuse, NY. 218 pp.nSolis M, Moya R (2004) Vochysia guatemalensis en Costa Rica. FONAFIFO. Ministerio de Energía y Minas. Gobierno de Costa Rica, San José, Costa Rica. 107 pp.nTuk J (2007) Maderas, Diseño y Construcción. 1st ed. Colegio Federado de Ingenieros y de Arquitectos de Costa Rica, San José, Costa Rica. 235 pp.nWard JC, Pang WY (1980) Wetwood in trees: A timber resource problem. Gen Tech Rep PNW-GTR-112. USDA Pacific Northwest Forest Range Exp Stn, Portland, OR. 87 pp.nYamamoto K, Sulaiman O, Kitingan C, Choon L, Nhan N (2003) Moisture distribution in stems of Acacia mangium, A. auriculiformis and hybrid acacia trees. Jpn Agric Res Q 37(3):207-212.nZobel BJ, Sprague JR (1998) Juvenile wood in forest trees. Springer-Verlag, Heidelberg, Germany. 300 pp.nZobel BJ, Van Buijtenen B (1989)Wood variation: Its causes and control. Springer-Verlag, New York, NY. 458 pp.n
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