Effect of stem height in variation of bark, heartwood, sapwood and physical properties of wood in <i>Dipteryx panamensis</i> Pittier in a provenance/progeny test
Copyright policy )Effect of stem height in variation of bark, heartwood, sapwood and physical properties of wood in <i>Dipteryx panamensis</i> Pittier in a provenance/progeny test
Dipteryx panamensis is used in reforestation in Costa Rica and a genetic improvement program has been recently started in the country. The objective of the present study was to study the effect of tree trunk height on the variation of bark, sapwood, heartwood, green density (GD), specific gravity (SG) and green moisture content in green condition (MC-G), in a collection of 8-year-old provenances/progenies planted in the town of Florencia in San Carlos in the northern region of Costa Rica The wood of each of 17 families were studied based on 3 of their progenies, evaluating the properties relative to 0, 25%, 50%, 75% and 100% of the commercial height. According to the results, tree diameter and bark thickness showed no statistical differences in their values across trunk. Significant differences were found in diameter and percentage of heartwood and sapwood between provenances and families. The thickness and percentage of sapwood, thickness and percentage of bark, diameter, pith percentage and percentage of pith eccentricity, showed no significant differences between families. SG and the MC-G presented significant variation between provenances, while GD registered differences at above 25 % commercial height. The variation of physical properties, especially SG, between families within each provenance, shows selection potential for genetic improvement, focusing particularly on the bottom section of the tree.
Forestry
Forestry
ASSIS, T. F.; RESENDE, M. D. V. DE. Genetic improvement of forest tree species. Crop Breeding and Applied Biotechnology, Viçosa, v. 11, n. spe, p. 44-49, jun. 2011. http://dx.doi.org/10.1590/ S1984-70332011000500007 ASTM. Standard test methods for direct moisture content measurement of wood and woodbase materials. Annual Book of ASTM Standards. Volume 4.10 (Woods), 2016a.
ASTM. Standard methods of testing small clear specimens of timber (A. S. F. T. Materials, Ed.). Annual Book of ASTM Standards. Volume 4.10 (Woods)West Conshohocken, PA, USA American Society For Testing and Materials, 2016b.
Present and future Köppen-Geiger climate classification maps at 1-km resolution. Scientific Data, New York, v. 5, n. 1, p. 1-12. Jua. 2018. https://doi.org/10.1038/sdata.2018.214 CLARK, D. B.; CLARK, D. A. Population ecology and microhabitat distribution of Dipteryx panamensis, a Neotropical rain forest emergent tree. Biotropica, New Yok, v. 19, n. 3, p. 236, set. 1987. https://doi.org/10.2307/2388341 DELGADO, A.; MONTERO, M.; MURILLO, O.; CASTILLO, M. Crecimiento de especies forestales nativas. Agronomía Costarricense, Costa Rica, v. 27, n. 1, p. 63-78, 2003.
HANSON, T.; FINEGAN, B.; WATTS, L. Conventional and genetic measures of seed dispersal for Dipteryx panamensis (Fabaceae) in continuous and fragmented Costa Rican rain forest. Journal of Tropical Ecology, Cambridge, v. 23, n. 6, p. 635-642, Nov. 2007. https://doi.org/10.1017/ S0266467407004488 HUANG, G. H.; LIANG, K.N.; ZHOU, Z.Z.; MA, H.M. Genetic variation and origin of teak (Tectona grandis L.f.) native and introduced provenances. Silvae Genetica, Waldsieversdorf, v. 64, n.
1-6, p. 33-46, 1 dez. 2015. https://doi.org/10.1515/sg-2015-0003 LEÓN, N.; MURILLO, O.; BADILLA, Y.; ÁVILA, C., MURILLO, R. Expected genetic gain and genotype by environment interaction in almond (Dipteryx panamensis (Pittier) Rec. and Mell) in Costa Rica. Silvae Genetica, Waldsieversdorf, v. 66, n. 1, p. 9-13, 28 dez. 2017. https://doi.
org/10.1515/sg-2017-0002 MARTÍNEZ, V.; FALLAS, L.; MURILLO, O.; BADILLA, Y. Potencial de mejoramiento genético en Dipteryx panamensis a los 33 meses de edad en San Carlos, Costa Rica. Revista Forestal Mesoamericana Kurú, Cartago, v. 13, n. 30, p. 03, 15 dez. 2015.
MOYA, R. La producción de madera de especies nativas en plantaciones comerciales: una opción real. Ambientico, Heredia, v. 267, n. 6, p. 32-36, 2018.
REDONDO-BRENES, A. Growth, carbon sequestration, and management of native tree plantations in humid regions of Costa Rica. New Forests, Berlin, v. 34, n. 3, p. 253-268, 24 set.
2007. https://doi.org/10.1007/s11056-007-9052-9
citations This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).0 popularity This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.Average influence This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).Average impulse This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.Average citations This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).0 popularity This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.Average influence This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).Average impulse This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.Average
Citations provided by BIP!Popularity provided by BIP!