Generalized stem taper and tree volume equations applied to eucalyptus of varying genetics in Brazil

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dc.contributor.authorScolforo, Henrique Ferraco
dc.contributor.authorMcTague, John Paul
dc.contributor.authorBurkhart, Harold
dc.contributor.authorRoise, Joseph
dc.contributor.authorCarneiro, Rafaela Lorenzato
dc.contributor.authorStape, Jose Luiz [UNESP]
dc.contributor.institutionNorth Carolina State Univ
dc.contributor.institutionVirginia Polytech Inst & State Univ
dc.contributor.institutionForestry Sci & Res Inst
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2019-10-04T12:13:44Z
dc.date.available2019-10-04T12:13:44Z
dc.date.issued2019-05-01
dc.description.abstractLack of generalized equations has prevailed in Brazil, because it is assumed that localized or climate-specific equations are needed. This study aimed to develop generalized stem taper and volume equations applicable to 11 eucalyptus clones and evaluate if climate variation impacts the accuracy of the estimates. A total of 693 trees evenly distributed across 11 clones at 21 sites were used for model fittings and predictive validation. The penalized mixed spline (PMS) approach was developed for predicting stem taper and volume along the stem profile. The Schumacher and Hall (1933) equation was used to predict total tree volume, while volume ratio equations were applied to predict merchantable volume. For every fitted equation, an annual climatic variable was included to assess the improvement in model performance. The overall results highlighted that climatic variation does not need to be accounted for in stem taper and volume modeling. All of the equations displayed desirable accuracy, but the generalized PMS equation may be preferred when the forestry enterprise looks to furnish a range of multiple forest products. The generalized total tree volume equation, combined with the ratio equations, is highly recommended when the forestry enterprise produces a single product.en
dc.description.affiliationNorth Carolina State Univ, Dept Forestry & Environm Resources, Raleigh, NC 27695 USA
dc.description.affiliationVirginia Polytech Inst & State Univ, Dept Forest Resources & Environm Conservat, Blacksburg, VA 24061 USA
dc.description.affiliationForestry Sci & Res Inst, BR-13415000 Sao Paulo, Brazil
dc.description.affiliationState Univ Sao Paulo, Dept Forest Sci, BR-18610034 Sao Paulo, Brazil
dc.description.affiliationUnespState Univ Sao Paulo, Dept Forest Sci, BR-18610034 Sao Paulo, Brazil
dc.description.sponsorshipConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.description.sponsorshipAnglo American
dc.description.sponsorshipArauco
dc.description.sponsorshipArborgen
dc.description.sponsorshipArcelor-Mittal
dc.description.sponsorshipCenibra
dc.description.sponsorshipCMPC
dc.description.sponsorshipComigo
dc.description.sponsorshipCopener
dc.description.sponsorshipDuratex
dc.description.sponsorshipEldorado
dc.description.sponsorshipFazenda Campo Bom
dc.description.sponsorshipFibria
dc.description.sponsorshipFlorestal Itaquari
dc.description.sponsorshipForestal Oriental
dc.description.sponsorshipGerdau
dc.description.sponsorshipGMR
dc.description.sponsorshipInternational Paper
dc.description.sponsorshipJari
dc.description.sponsorshipKlabin
dc.description.sponsorshipLwarcel
dc.description.sponsorshipMontes del Plata
dc.description.sponsorshipPlantar
dc.description.sponsorshipRigesa
dc.description.sponsorshipSuzano
dc.description.sponsorshipVallourec
dc.description.sponsorshipVeracel
dc.description.sponsorshipUniversity of Sao Paulo
dc.description.sponsorshipSao Paulo State University
dc.description.sponsorshipFederal University of Lavras
dc.description.sponsorshipFederal University of Rio Grande do Norte
dc.description.sponsorshipColorado State University
dc.description.sponsorshipNorth Carolina State University
dc.description.sponsorshipUSDA Forest Service
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.description.sponsorshipIdCNPq: 249979/2013-6
dc.format.extent447-462
dc.identifierhttp://dx.doi.org/10.1139/cjfr-2018-0276
dc.identifier.citationCanadian Journal Of Forest Research. Ottawa: Canadian Science Publishing, Nrc Research Press, v. 49, n. 5, p. 447-462, 2019.
dc.identifier.doi10.1139/cjfr-2018-0276
dc.identifier.issn0045-5067
dc.identifier.urihttp://hdl.handle.net/11449/184461
dc.identifier.wosWOS:000465607400004
dc.language.isoeng
dc.publisherCanadian Science Publishing, Nrc Research Press
dc.relation.ispartofCanadian Journal Of Forest Research
dc.rights.accessRightsAcesso aberto
dc.sourceWeb of Science
dc.subjectpenalized mixed spline
dc.subjectvolume ratio
dc.subjectclimate
dc.titleGeneralized stem taper and tree volume equations applied to eucalyptus of varying genetics in Brazilen
dc.typeArtigo
dcterms.rightsHolderCanadian Science Publishing, Nrc Research Press

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