Mathematical model for predicting the physical properties in the wood of Eucalyptus nitens for different heights and ages of tree
Autor(a) principal: | |
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Data de Publicação: | 2020 |
Outros Autores: | |
Tipo de documento: | Artigo |
Idioma: | spa |
Título da fonte: | Ciência Florestal (Online) |
Texto Completo: | https://periodicos.ufsm.br/cienciaflorestal/article/view/32493 |
Resumo: | Eucalyptus nitens has a great potential for its use in higher value-added products, mainly due to its growth rate and adaptability to different soils and climates. However, its use is still limited, due to lack of knowledge of its physical properties throughout the log. In this sense, the objective of the research was to model the physical properties at different heights and age of the tree. To do so, 40 trees of 13 years, 12 of 15 years and 5 of 20 years were selected, evaluating their physical properties from the base (0.3 m) to the Usable Free Diameter of 8 cm. The basic density and moisture content were determined by standard NCh176/2 Of. 86 and NCh176/1 Of. 86, respectively. The results showed a basic density at 13 years of 474 kg/m3, with a moisture content of 116%, at 15 years it was 496 kg/m3 and 108% and at 20 years it was 521 kg/m3 and 104% respectively. There was an increase of 4.6% and 9.7% in the basic density at 15 and 20 years compared to 13 years. The model detected an inverse relationship between the basic density and moisture content, both presenting a high correlation with the height and age of tree. Finally, the model predicted with high level of precision the physical properties in Eucalyptus nitens trees. So, it can be used as a tool to support decision-making when defining the use of logs according to the type of product to obtain. |
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Mathematical model for predicting the physical properties in the wood of Eucalyptus nitens for different heights and ages of treeModelo matemático para predecir las propiedades físicas en madera de Eucalyptus nitens para diferentes alturas y edades del árbolBasic densityMoisture contentStatistical analysisDensidad básicaContenido de humedadAnálisis estadísticoEucalyptus nitens has a great potential for its use in higher value-added products, mainly due to its growth rate and adaptability to different soils and climates. However, its use is still limited, due to lack of knowledge of its physical properties throughout the log. In this sense, the objective of the research was to model the physical properties at different heights and age of the tree. To do so, 40 trees of 13 years, 12 of 15 years and 5 of 20 years were selected, evaluating their physical properties from the base (0.3 m) to the Usable Free Diameter of 8 cm. The basic density and moisture content were determined by standard NCh176/2 Of. 86 and NCh176/1 Of. 86, respectively. The results showed a basic density at 13 years of 474 kg/m3, with a moisture content of 116%, at 15 years it was 496 kg/m3 and 108% and at 20 years it was 521 kg/m3 and 104% respectively. There was an increase of 4.6% and 9.7% in the basic density at 15 and 20 years compared to 13 years. The model detected an inverse relationship between the basic density and moisture content, both presenting a high correlation with the height and age of tree. Finally, the model predicted with high level of precision the physical properties in Eucalyptus nitens trees. So, it can be used as a tool to support decision-making when defining the use of logs according to the type of product to obtain.El Eucalyptus nitens presenta gran potencial para utilizarse en productos de mayor valor agregado, debido principalmente a su tasa de crecimiento y adaptabilidad a diferentes suelos y climas. Sin embargo, su uso aún es limitado, debido al desconocimiento de sus propiedades físicas a lo largo del fuste. En este sentido, el objetivo de la investigación fue modelar sus propiedades físicas a diferente altura y edad del árbol. Para esto, se seleccionaron 40 árboles de 13 años, 12 de 15 años y 5 de 20 años, evaluando propiedades físicas desde la base (0,3 m) hasta el Diámetro Libre Utilizable de 8 cm. Se determinaron la densidad básica y el contenido de humedad según norma NCh176/2 Of. 86 y NCh176/1 Of. 86 respectivamente. Los resultados mostraron una densidad básica a los 13 años de 474 kg/m3, con un contenido de humedad de 116%, a los 15 años fue de 496 kg/m3y 108% y a los 20 años de 521 kg/m3 y 104%. Se observó un aumento del 4,6% y 9,7% en la densidad básica a los 15 y 20 años con respecto a la observada a los 13 años. El modelo detectó una relación inversa entre la densidad básica y el contenido de humedad, presentando ambas una alta correlación con la altura y la edad del árbol. Finalmente, el modelo predijo con alto nivel de precisión las propiedades físicas en esta especie, por lo que puede usarse como una herramienta para apoyar en la toma de decisiones al momento de definir el uso de las trozas según el tipo de producto que se quiera obtener.Universidade Federal de Santa Maria2020-12-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://periodicos.ufsm.br/cienciaflorestal/article/view/3249310.5902/1980509832493Ciência Florestal; Vol. 30 No. 4 (2020); 980-994Ciência Florestal; v. 30 n. 4 (2020); 980-9941980-50980103-9954reponame:Ciência Florestal (Online)instname:Universidade Federal de Santa Maria (UFSM)instacron:UFSMspahttps://periodicos.ufsm.br/cienciaflorestal/article/view/32493/pdfCopyright (c) 2020 Ciência Florestalinfo:eu-repo/semantics/openAccessRozas, CarlosMontero, Claudio2021-05-20T04:00:48Zoai:ojs.pkp.sfu.ca:article/32493Revistahttp://www.ufsm.br/cienciaflorestal/ONGhttps://old.scielo.br/oai/scielo-oai.php||cienciaflorestal@ufsm.br|| cienciaflorestal@gmail.com|| cf@smail.ufsm.br1980-50980103-9954opendoar:2021-05-20T04:00:48Ciência Florestal (Online) - Universidade Federal de Santa Maria (UFSM)false |
dc.title.none.fl_str_mv |
Mathematical model for predicting the physical properties in the wood of Eucalyptus nitens for different heights and ages of tree Modelo matemático para predecir las propiedades físicas en madera de Eucalyptus nitens para diferentes alturas y edades del árbol |
title |
Mathematical model for predicting the physical properties in the wood of Eucalyptus nitens for different heights and ages of tree |
spellingShingle |
Mathematical model for predicting the physical properties in the wood of Eucalyptus nitens for different heights and ages of tree Rozas, Carlos Basic density Moisture content Statistical analysis Densidad básica Contenido de humedad Análisis estadístico |
title_short |
Mathematical model for predicting the physical properties in the wood of Eucalyptus nitens for different heights and ages of tree |
title_full |
Mathematical model for predicting the physical properties in the wood of Eucalyptus nitens for different heights and ages of tree |
title_fullStr |
Mathematical model for predicting the physical properties in the wood of Eucalyptus nitens for different heights and ages of tree |
title_full_unstemmed |
Mathematical model for predicting the physical properties in the wood of Eucalyptus nitens for different heights and ages of tree |
title_sort |
Mathematical model for predicting the physical properties in the wood of Eucalyptus nitens for different heights and ages of tree |
author |
Rozas, Carlos |
author_facet |
Rozas, Carlos Montero, Claudio |
author_role |
author |
author2 |
Montero, Claudio |
author2_role |
author |
dc.contributor.author.fl_str_mv |
Rozas, Carlos Montero, Claudio |
dc.subject.por.fl_str_mv |
Basic density Moisture content Statistical analysis Densidad básica Contenido de humedad Análisis estadístico |
topic |
Basic density Moisture content Statistical analysis Densidad básica Contenido de humedad Análisis estadístico |
description |
Eucalyptus nitens has a great potential for its use in higher value-added products, mainly due to its growth rate and adaptability to different soils and climates. However, its use is still limited, due to lack of knowledge of its physical properties throughout the log. In this sense, the objective of the research was to model the physical properties at different heights and age of the tree. To do so, 40 trees of 13 years, 12 of 15 years and 5 of 20 years were selected, evaluating their physical properties from the base (0.3 m) to the Usable Free Diameter of 8 cm. The basic density and moisture content were determined by standard NCh176/2 Of. 86 and NCh176/1 Of. 86, respectively. The results showed a basic density at 13 years of 474 kg/m3, with a moisture content of 116%, at 15 years it was 496 kg/m3 and 108% and at 20 years it was 521 kg/m3 and 104% respectively. There was an increase of 4.6% and 9.7% in the basic density at 15 and 20 years compared to 13 years. The model detected an inverse relationship between the basic density and moisture content, both presenting a high correlation with the height and age of tree. Finally, the model predicted with high level of precision the physical properties in Eucalyptus nitens trees. So, it can be used as a tool to support decision-making when defining the use of logs according to the type of product to obtain. |
publishDate |
2020 |
dc.date.none.fl_str_mv |
2020-12-01 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
https://periodicos.ufsm.br/cienciaflorestal/article/view/32493 10.5902/1980509832493 |
url |
https://periodicos.ufsm.br/cienciaflorestal/article/view/32493 |
identifier_str_mv |
10.5902/1980509832493 |
dc.language.iso.fl_str_mv |
spa |
language |
spa |
dc.relation.none.fl_str_mv |
https://periodicos.ufsm.br/cienciaflorestal/article/view/32493/pdf |
dc.rights.driver.fl_str_mv |
Copyright (c) 2020 Ciência Florestal info:eu-repo/semantics/openAccess |
rights_invalid_str_mv |
Copyright (c) 2020 Ciência Florestal |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
Universidade Federal de Santa Maria |
publisher.none.fl_str_mv |
Universidade Federal de Santa Maria |
dc.source.none.fl_str_mv |
Ciência Florestal; Vol. 30 No. 4 (2020); 980-994 Ciência Florestal; v. 30 n. 4 (2020); 980-994 1980-5098 0103-9954 reponame:Ciência Florestal (Online) instname:Universidade Federal de Santa Maria (UFSM) instacron:UFSM |
instname_str |
Universidade Federal de Santa Maria (UFSM) |
instacron_str |
UFSM |
institution |
UFSM |
reponame_str |
Ciência Florestal (Online) |
collection |
Ciência Florestal (Online) |
repository.name.fl_str_mv |
Ciência Florestal (Online) - Universidade Federal de Santa Maria (UFSM) |
repository.mail.fl_str_mv |
||cienciaflorestal@ufsm.br|| cienciaflorestal@gmail.com|| cf@smail.ufsm.br |
_version_ |
1799944133792497664 |