ESTRUTURA DO LENHO DE Plathymenia reticulata E ALGUMAS IMPLICAÇÕES NA EFICIÊNCIA HIDRÁULICA E RESISTÊNCIA MECÂNICA

Longui, Eduardo Luiz; Lima, Israel Luiz de; Flörsheim, Sandra Monteiro Borges; Melo, Antônio Carlos Galvão de; Romeiro, Diego; Suckow, Itiberê Moura Sckerratt; Testoni, Luana Naves

doi:10.5380/rf.v42i2.19524

Cited by 3 publications

(2 citation statements)

References 17 publications

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“…The results obtained for the double-grafted PB 311 + MDF 180 suggest that the changes in these cellular elements were in function of increased mechanical resistance. Fibers with thicker walls promote the wood structural adjustments contributing to the tree sustainability and, consequently, increasing the mechanical resistance (Longui et al 2012;França et al 2015). The lumen diameter, in turn, is related in reverse, that is, the smaller, the more the wood resistance tends to be (Evangelista et al 2010).…”

Section: Influence Of Canopy Graft On the Quantitative Anatomical Cha...mentioning

confidence: 99%

Does a graft located in the canopy of a rubber tree affect the morphologies of cells in the adjacent wood?

Santos

Latorraca

Toniasso

et al. 2019

BioRes

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The objective of this study was to characterize the wood anatomical structure of a rubber tree clone, under the influence of two different canopy grafts. The following rubber trees were selected in the system of a double-grafted PB 311 + FX 2784 and PB 311 + MDF 180. For each tree, discs of wood were cut from the affected branch immediately below the insertion of clone at right angles to the axis, from which the regions corresponding to tension, in opposite and normal wood, were identified. The anatomical analyses were conducted in accordance with the standards established by the International Association of Wood Anatomy Committee. The Kruskal-Wallis nonparametric test was applied for multiple comparisons among the types of woods and radial positions studied, at 5% of significance. Still, multivariate associations were assessed among the anatomical characteristics of both double-grafted rubber trees, by means of a two-step cluster analysis. Quantitative morphological differences were observed in the wood cells of the double-grafted studied clones. The ray height and the vessels diameter were the most important morphologic characteristics for the distinction. The canopy clone exhibited the ability to modulate the quantitative anatomical characters of the panel clone, depending on the plant’s needs.

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Section: Influence Of Canopy Graft On the Quantitative Anatomical Cha...mentioning

confidence: 99%

Does a graft located in the canopy of a rubber tree affect the morphologies of cells in the adjacent wood?

Santos

Latorraca

Toniasso

et al. 2019

BioRes

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show abstract

“…O comportamento físico da madeira varia entre espécies, entre indivíduos da mesma espécie e dentro de um único fuste no sentido medula-casca e da base para o topo (MELO et al, 2014;GARCIA, 2010;COUTO et al, 2012), sendo influenciado pela idade, taxa de crescimento, tratamentos silviculturais e sítio (KOLLMANN;CÔTÉ, 1968;LONGUI et al, 2012;MIRANDA et al, 2012;SOTELO MONTES et al, 2007). Entender esta variação é necessário para definir o diâmetro mínimo de corte, permitir o manejo específico e aumentar o número de espécies passíveis de exploração, respeitando os processos ecológicos que garantem a manutenção dos táxons e de seus estoques.…”

Section: Introductionunclassified

Propriedades físicas da madeira de Calycophyllum spruceanum Benth. em função do diâmetro e da posição (base e topo) no fuste

Araújo¹,

Sousa²,

Nascimento³

et al. 2016

Sci. For.

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ResumoO conhecimento das propriedades tecnológicas da madeira é fundamental para o manejo e uso racional das espécies florestais. O estudo das propriedades físicas da madeira de Calycophyllum spruceanum teve por objetivo fornecer subsídios para a produção de madeira em floresta de várzea estuarina. Foram coletadas amostras de madeira na base e topo do fuste de 15 árvores com diferentes diâmetros para a determinação das propriedades físicas (densidade básica, fator anisotrópico e contrações axial, radial, tangencial e volumétrica), conforme norma NBR 7190/97. A madeira de C. spruceanum apresentou média geral de 0,65 g.cm -3 para densidade básica, 5,1% para contração radial, 7,3% para contração tangencial, 14,1% para contração volumétrica e 1,6 para fator anisotrópico. Pela análise de covariância verificou-se efeito significativo da posição no fuste apenas para fator anisotrópico e contração tangencial, em que os maiores valores para estas propriedades foram obtidos na base do fuste das árvores. A inexistência de efeito significativo do diâmetro à altura do peito (DAP) das árvores sobre as propriedades físicas estudadas, associada aos valores de densidade básica e adequados, sob o aspecto da estabilidade dimensional, para o fator anisotrópico evidenciam o potencial madeireiro da espécie, mesmo proveniente de indivíduos menores que o diâmetro mínimo de corte (50 cm), estabelecido pela legislação brasileira.Palavras-chave: densidade básica, floresta de várzea, pau-mulato, qualidade da madeira, retratibilidade. AbstractThe knowledge of the technological properties of the wood is important for the management and rational use of forest species. The study of the physical properties of Calycophyllum spruceanum wood aims to provide subsidies for timber production in estuarine floodplain forests. Samples were collected at base and top of the stem from 15 trees with different diameters to determine the physical properties (basic density, anisotropic factor and axial, radial, tangential and volumetric shrinkage), according to NBR 7190/97. C. spruceanum wood showed overall average of 0.65 g.cm -3 for density, 5.1% for radial shrinkage, 7.3% for tangential shrinkage, 14.1% for volumetric shrinkage and 1.6 for anisotropic factor. By analysis of covariance there was a significant effect of position on the stem only for anisotropic factor and tangential shrinkage, where the highest values for these properties were obtained at the base of the stem of the trees. The inexistence of significant effect of diameter at breast height (DBH) trees on the physical properties studied associated with values of basic density and adequate, from the aspect of dimensional stability for the anisotropic factor show that the timber of the species presents possibilities to be used as solid wood, even from trees under the minimum logging diameters (50 cm), established by Brazilian law.

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Facial Biocosmetics Based on Natural Dyes from Amazon Wood Residues

Nicaretta

Silva

Corrêa

et al. 2022

Journal of Sustainable Forestry

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ESTRUTURA DO LENHO DE Plathymenia reticulata E ALGUMAS IMPLICAÇÕES NA EFICIÊNCIA HIDRÁULICA E RESISTÊNCIA MECÂNICA

Cited by 3 publications

References 17 publications

Does a graft located in the canopy of a rubber tree affect the morphologies of cells in the adjacent wood?

Does a graft located in the canopy of a rubber tree affect the morphologies of cells in the adjacent wood?

Propriedades físicas da madeira de Calycophyllum spruceanum Benth. em função do diâmetro e da posição (base e topo) no fuste

Facial Biocosmetics Based on Natural Dyes from Amazon Wood Residues

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