Influência do método de propagação na produção e qualidade da madeira de Tectona grandis

Oliveira, Aylson Costa; Pereira, Bárbara Luísa Corradi; Mendes, Mylla Cristie da Silva; Lemos, J. A. dos Santos; Madi, João Paulo Sardo

doi:10.34062/afs.v6i3.8183

Cited by 9 publications

(9 citation statements)

References 5 publications

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“…Teakwood is porous with distinct growth rings marked by lines of marginal parenchyma, and its sapwood has a yellowish color and brown heartwood. The quality of teak wood is mainly linked to the heartwood region (Lemos et al 2019), since high natural durability and high dimensional stability, characteristics due to the presence of some substances, such as caucho, a species of latex responsible for the reduction water absorption, and tectoquinone, a natural preservative contained in the cells of the wood (Kokutse et al 2006).…”

Section: Introductionmentioning

confidence: 99%

“…In the T. grandis species, the sapwood presents inferior wood quality than heartwood (Lemos et al 2019), the heterogeneous and yellowish color pattern in the sapwood reduces its acceptance in the market (Mononen et al 2002). As a solution, it is common to apply heat treatment in teakwood to reduce the differences observed in coloring (Bonfatti Júnior and Lengowski 2018).…”

Section: Introductionmentioning

confidence: 99%

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Properties of thermally modified teakwood

Lengowski

Júnior

Nisgoski

et al. 2020

Maderas, Cienc. tecnol.

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Thermal modification is a treatment that seeks to improve the properties of wood and reduce the heterogeneity in its color. The objective of this work was to evaluate the effect of thermal treatment on the anatomical, chemical, physical, mechanical, colorimetric, and thermal stability properties of teakwood. For this, teakwood samples were treated by an industrial autoclave at final cycle temperature of 160 ºC. The reduction of cell wall thickness, the formation of cross-fissures and the crystallization of the wax inside the pores were observed in the anatomical structure. Chemically, the extractives evaporated and the polysaccharides ruptured, of which hemicellulose was the most affected. The heat treatment promoted lower equilibrium moisture, reducing the hygroscopicity and improving the dimensional stability of the wood. Considering the mechanical properties, the rupture modulus and the longitudinal and tangential hardness decreased after the heat treatment. The color of the wood changed significantly, from pink to dark brown. The treated wood had higher thermal stability, with greater weight loss at higher temperatures than the untreated wood.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Properties of thermally modified teakwood

Lengowski

Júnior

Nisgoski

et al. 2020

Maderas, Cienc. tecnol.

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“…In addition, for species used for sawmill wood production, such as teak, it is important to evaluate other traits related to wood quality (Naranjo et al 2012;Arce and Moya 2015), such as measurement, heartwood /sapwood proportion, and density, considering that these are the main resources that influence the quality and value of sawn wood (Lemos et al 2019).…”

Section: Discussionmentioning

confidence: 99%

Genetic parameters in a clonal test of Tectona grandis in Mato Grosso, Brazil

Pereira¹,

Caldeira

Arriel

2021

ADV. FOR. SCI.

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Teak (Tectona grandis) is a high-value timber species in tropical regions. In Brazil, although teak has a high productivity, there are few studies related to its genetic improvement. This work aimed to estimate genetic parameters and evaluate potential gains of selection in a clonal test of teak installed in the state of Mato Grosso, Brazil. The experimente is in a randomized block design, with five replications, 3x3 m spacing, 22 treatments, and plots with six individuals. At five years, the genotypes were evaluated for survival (S), tree total height (H) and girth at breast height (GBH). There was significance and feasibility of selection for S and GBH. For H, the result was not significant, indicating few gains with the selection. The genetic parameters of clonal mean heritabilities and accuracy were of moderate magnitude for S and GBH and low for H. To best of our knowledge, this is the first work that estimates genetic parameters in a clonal teak test in the field in Brazil.

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“…Pinus taeda é uma das espécies mais cultivada no sul do Brasil, devido a boa adaptabilidade as condições de solo e clima existente na região, com produtividade média de 29,7 m³ ha -1 , médias que superam médias internacionais (IBÁ, 2019;IBÁ, 2022). Plantios de Pinus ocupam uma área de aproximadamente 1,7 milhões de hectares, e concentram-se principalmente no Paraná, Santa Catarina, Rio Grande do Sul e São Paulo, e nos últimos anos a área plantada com esse gênero vem se mantendo estável, concentrando-se cada vez mais nesses estados, devido principalmente as condições de solo e clima existentes nesta região, que são ideais para a produção florestal desta espécie (Oliveira et al, 2018;Dobner Júnior;Campoe, 2019;Ibá, 2021).…”

Section: Introductionunclassified

Caracteristicas dendrométricas de um povoamento de Pinus taeda L. submetidos a diferentes regimes de manejos

Cruz,

Nicoletti,

Dobner Júnior

et al. 2023

Rev. Agro. Amb.

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O objetivo deste estudo foi avaliar a influência de diferentes intensidades de desbastes nas características dendrométricas de um povoamento de P. taeda aos 37 anos de idade, no município de Campo Belo do Sul, Santa Catarina. O plantio foi realizado em 1982, sendo 2.500 árvores ha-1, e o experimento delimitado em 1986, quando a floresta tinha quatro anos de idade. Os tratamentos testados consistiram na seleção de 400 árvores potenciais ha-1 que foram favorecidas pela remoção de suas concorrentes diretas. Ao todo foram realizados sete desbastes, onde foram removidas nenhuma (testemunha), uma, duas, quatro ou todas as árvores concorrentes diretas das árvores potenciais. No inventário foram mensurados a circunferência à altura do peito e altura total (h). Posteriormente, foram calculadas as médias do diâmetro à altura do peito (DAP), altura total (h), diâmetro e altura dominante (ddom, hdom) e volume individual (v) por tratamento, além do número de árvores, área basal e volume por hectare. Todas as variáveis analisadas apresentaram diferença significativas entre os tratamentos, exceto o volume acumulado por hectare, altura média e dominante. O tratamento não desbastado apresentou área basal e volume em pé individual superior aos dos demais tratamentos.

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Influência do método de propagação na produção e qualidade da madeira de Tectona grandis

Cited by 9 publications

References 5 publications

Properties of thermally modified teakwood

Properties of thermally modified teakwood

Genetic parameters in a clonal test of Tectona grandis in Mato Grosso, Brazil

Caracteristicas dendrométricas de um povoamento de Pinus taeda L. submetidos a diferentes regimes de manejos

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