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Stem volume ratio equations to variable merchantable limits for sweet chestnut in Portugal

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dc.contributor.authorPatrício, Maria Sameiro
dc.contributor.authorTomé, Margarida
dc.date.accessioned2024-09-30T10:00:24Z
dc.date.embargo2025-08-01
dc.date.issued2024
dc.description.abstractThe volume is a fundamental dendrometric characteristic that helps estimate the amount and value of wood that can be harvested, and provides insight into land productivity. However, accurately measuring trees for volume calculation is both costly and time-consuming. Therefore, equations that estimate volume based on dendrometric variables, such as DBH (diameter breast height) and total or merchantable height, are highly important for forecasting forest production. However, the total stem volume alone does not indicate the amount of wood available for specific uses, such as sawtimber or biomass. Stem volume ratio equations are essential as they provide flexibility in determining the volume of wood based on the tree's various usage categories and potential changes in market demands over time. These equations allow for alternative options in obtaining volume, considering variable top diameter or height. Forest managers can use these equations to estimate the volumes of multiple logs from a single stem during integrated logging and for forest inventory purposes that require yield estimates by product categories. These tools are scarce, namely for sweet chestnut (Castanea sativa Mill.). Therefore, this study's primary objective was to develop volume ratio prediction equations based on tree dendrometric variables, including DBH and total height, for high forest chestnut stands located in northern Portugal. Both linear and nonlinear regression estimation methods were employed, with data analysis based on information collected from 466 standing trees measured using a Bitterlich’s telerescope for precise volume determination. Model validation involved destructive analysis of 39 felled trees distributed across the existing diameter classes (10-65 cm) in three adult chestnut stands. The study employed the ordinary least squares method to fit several linear and nonlinear equations to select models, with the best-fitting equations presented.pt_PT
dc.description.sponsorshipThe data used in this study were collected with the financial support of the AGRO Program, Project 267: Sustainable Management of Chestnut Forested Areas in High-Forest and Coppice Systems. The authors would like to express also their gratitude to the Foundation for Science and Technology (FCT, Portugal) for providing financial support through national funds (FCT/MCTES) to CIMO (UIDB/00690/2020)pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationPatrício, Maria Sameiro; Tomé, M. (2024). Stem volume ratio equations to variable merchantable limits for sweet chestnut in Portugal. In VII International Chestnut Symposium. p. 357–364. ISBN 978-94-62613-99-7pt_PT
dc.identifier.doi10.17660/ActaHortic.2024.1400.43pt_PT
dc.identifier.issn0567-7572
dc.identifier.urihttp://hdl.handle.net/10198/30298
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.relationMountain Research Center
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/pt_PT
dc.subjectVolume equationspt_PT
dc.subjectCastanea sativa Mill.pt_PT
dc.subjectMerchantability prediction equationspt_PT
dc.subjectYieldpt_PT
dc.subjectTimberpt_PT
dc.titleStem volume ratio equations to variable merchantable limits for sweet chestnut in Portugalpt_PT
dc.typeconference object
dspace.entity.typePublication
oaire.awardNumberUIDB/00690/2020
oaire.awardTitleMountain Research Center
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDB%2F00690%2F2020/PT
oaire.citation.endPage364pt_PT
oaire.citation.startPage357pt_PT
oaire.citation.titleVII International Chestnut Symposiumpt_PT
oaire.citation.volume1400pt_PT
oaire.fundingStream6817 - DCRRNI ID
person.familyNamePatrício
person.givenNameMaria Sameiro
person.identifier.ciencia-id6310-0055-C4A0
person.identifier.orcid0000-0001-7773-8802
person.identifier.ridG-6811-2014
person.identifier.scopus-author-id35222136400
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameFundação para a Ciência e a Tecnologia
rcaap.rightsembargoedAccesspt_PT
rcaap.typeconferenceObjectpt_PT
relation.isAuthorOfPublicationa6358916-0f73-473d-b43c-26c7de98d4e3
relation.isAuthorOfPublication.latestForDiscoverya6358916-0f73-473d-b43c-26c7de98d4e3
relation.isProjectOfPublication29718e93-4989-42bb-bcbc-4daff3870b25
relation.isProjectOfPublication.latestForDiscovery29718e93-4989-42bb-bcbc-4daff3870b25

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