Por favor, use este identificador para citar o enlazar este ítem: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1144185
Registro completo de metadatos
Campo DCValorLengua/Idioma
dc.contributor.authorSILVA, U. S. da C.
dc.contributor.authorRUSCHEL, A. R.
dc.contributor.authorREIS, I. M. S.
dc.date.accessioned2022-06-21T13:19:22Z-
dc.date.available2022-06-21T13:19:22Z-
dc.date.created2022-06-21
dc.date.issued2022
dc.identifier.citationJournal of Agricultural Science, v. 14, n. 7, p. 83-105, 2022.
dc.identifier.urihttp://www.alice.cnptia.embrapa.br/alice/handle/doc/1144185-
dc.descriptionGiven its complexity, directional felling is considered one of the most dangerous activities in the exploratory phase of forest management projects for timber obtention. Therefore, detailed studies of the variables influencing its execution are necessary. The present research was conducted in the Tapajós National Forest, Brazilian Amazon, and analyzed 1,075 trees logged using the directional felling technique in a 504.30 ha area. To better understand directional felling, the studied variables were subjected to descriptive analyses and principal component analysis, a multivariate procedure that enables the simultaneous evaluation of several variables. While the diameter, basal area, and stem and branch volume explained most of the variability concerning directional felling, the commercial height influenced the least. Trees of the species Hymenolobium petraeum (angelim pedra) strongly correlated with the dendrometric variables diameter and stem and branch volume. Those of the species Hymenaea courbaril (jatobá) showed a strong correlation with the commercial height. Pseudopiptadenia psilostachya (fava timborana), Dipteryx odorata (cumaru), Hymenaea parvifolia (jutai mirim), and Astronium lecointei (muiracatiara) had a strong correlation with the basic wood density. Trees of the species Couratari guianensis (tauari), Lecythis pisonis (sapucaia), Astronium lecointei (muiracatiara), Mezilaurus itauba (itaúba), and Goupia glabra (cupiúba) showed lower correlations with the time needed for planning, cutting, and felling. They also had a reduced correlation with the angular differences between the natural and effective and the intended and effective felling directions. The latter results suggest that these species do not follow a defined pattern concerning the directional felling technique. However, trees of the other species followed a different tendency. In general, the logged trees lacked correlation with the directional felling cutting and total operation time. The analyses suggest that as the diameter of a tree increases, the chances of completing its directional felling decrease.
dc.language.isoeng
dc.rightsopenAccess
dc.subjectReduced impact logging
dc.subjectDirectional felling
dc.subjectNatural fall
dc.subjectDendrometric variables
dc.subjectChainsaw operator
dc.titleFactors influencing directional tree felling in the Tapajós National Forest, Amazon, Brazil.
dc.typeArtigo de periódico
dc.subject.thesagroÁrvore
dc.subject.thesagroÁrvore Florestal
dc.subject.thesagroCorte
dc.subject.thesagroExtração da Madeira
dc.subject.nalthesaurusPrincipal component analysis
riaa.ainfo.id1144185
riaa.ainfo.lastupdate2022-06-21
dc.identifier.doihttps://doi.org/10.5539/jas.v14n7p83
dc.contributor.institutionULISSES SIDNEI DA CONCEIÇÃO SILVA, UFRA / UFOPA; ADEMIR ROBERTO RUSCHEL, CPATU; IOLANDA MARIA SOARES REIS, UFOPA.
Aparece en las colecciones:Artigo em periódico indexado (CPATU)

Ficheros en este ítem:
Fichero Descripción TamañoFormato 
FactorsInfluencingDirectional.pdf2.39 MBAdobe PDFVista previa
Visualizar/Abrir
Mostrar el registro sencillo del ítem

FacebookTwitterDeliciousLinkedInGoogle BookmarksMySpace