Crescimento e qualidade energética da madeira de Tachigali vulgaris sob diferentes espaçamentos

Tonini, Hélio; Schwengber, Dalton Roberto; Morales, Marina Moura; Oliveira, Jane Maria Franco de

doi:10.4336/2018.pfb.38e201801569

Cited by 8 publications

(5 citation statements)

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“…However, Tonini et al (2018) assessed growth and energetic quality of Tachigali vulgaris wood in different spacings, in Cantá, Roraima. They concluded that the planting spacing had no influence on diametric growth, volumetric production, individual biomass produced in the trunk, and species energetic potential.…”

Section: Discussionmentioning

confidence: 99%

WOOD VOLUMETRY OF Tachigali vulgaris PURE PLANTATIONS IN DIFFERENT PLANTING SPACINGS

Ramos

Miranda

Soares

et al. 2021

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The aim of this study was to develop volumetric equations for tachi-branco trees (Tachigali vulgaris L. G. Silva & H. C. Lima), by assessing the effect of initial planting spacing in volume estimates, as well as developing an equation to estimate the equivalent diameter (deq). Data are from an experiment located in north Pará. The experiment was conducted with the randomized blocks design, being three blocks with six treatments each. The most used volumetric models were assessed for two distinct situations: considering each trunk as a tree and using the tree deq as independent variables in the volumetric model. The need for individual equations for initial planting spacing was tested. In addition, an equation for deq estimate was proposed. The use of deq provided more precise and accurate volumetric estimates regarding diameter at breast height. Among the models tested, the Schumacher-Hall model was selected. Through the model identity test, the equation can be used to estimate tree volume of Tachigali vulgaris, regardless of planting spacing. The equivalent diameter can be estimated via equation from minimum and maximum diameters of tree trunks. The maximum percentage differences of volume by hectare obtained with the measurement of all trunks and deq were only 5% without loss in production accuracy per unit of area

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Section: Discussionmentioning

confidence: 99%

WOOD VOLUMETRY OF Tachigali vulgaris PURE PLANTATIONS IN DIFFERENT PLANTING SPACINGS

Ramos

Miranda

Soares

et al. 2021

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“…myrmecophila) (Fedalto et al 1989). Some wood physical, chemical, and mechanical properties have been studied for T. vulgaris (Orellana et al 2018;Tonini et al 2018;dos Santos Silva et al 2019), S. paniculatum (do Vale et al 2010), and T. glauca (Silva 2018).…”

Section: Introductionmentioning

confidence: 99%

Bark characterization of Tachigali guianensis and Tachigali glauca from the Amazon under a valorization perspective

Mota

Sartori

Ribeiro

et al. 2021

BioRes

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Barks of Tachigali guianensis and Tachigali glauca, from the Brazilian Amazon rainforest, were studied regarding anatomy and chemical composition. The barks were similar, with a narrow rhytidome, a ring of sclerified cells below the periderm, a widely dilated and sclerified nonconducting phloem, septate crystal strands, and extensive phenolic deposits in cells. Differences between the species were mainly in the sclerenchyma. Proportions of cell types in the T. guianensis and T. glauca barks were, respectively: 27.8% and 28.3% axial parenchyma, 15.6% and 15.1% sieve tube elements, 11.6% and 13.4% radial parenchyma, 15.6% and 8.7% sclereids, and 30.5% and 34.5% fibers. Chemical analysis showed that the T. guianensis and T. glauca barks included, respectively: 18.0% and 15.3% extractives, 1.8% and 1.0% suberin, 26.8% and 27.9% lignin, and 3.5% and 4.5% ash. The predominant polysaccharides were glucose (72.8% and 82.8% of total neutral sugars) and xylose (17.9% and 11.6%). Ethanol-water extracts were high in phenolics (total phenolics of 441.0 mg gallic acid equivalents (GAE) / g extract and 641.7 mg GAE / g extract), with moderate antioxidant activities (IC50 values of 7.3 µg extract / mL and 5.6 µg extract / mL). Tachigali guianensis bark and, particularly, T. glauca bark may be sources of phenolic compounds.

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“…In the commercial wood production, the spacing is among the most relevant indicatives, being highlighted in scientific studies, that address the correct use through planting rows experiments in the most diverse environments and indicating in which situations it should be expanded or reduced [4][5][6]. The spacing in short rotation planting, such as the rose gum case, directly influences the technological properties of the produced wood, due to characteristics such as the rate and form of growth and formation of juvenile and mature wood [7,2].…”

Section: Introductionmentioning

confidence: 99%

Flexão estática de madeira de Eucalyptus grandis: espaçamento e efeito da variação radial

et al. 2020

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RESUMO Estudos que abordam os parâmetros tecnológicos da madeira de amplo uso, como Eucalyptus grandis, são fundamentais, uma vez que seu uso e exploração adequados dependem dessas características. Atualmente, o implante dessa espécie foi ampliado e o espaçamento é um fator determinante. Portanto, o objetivo do presente estudo foi avaliar o espaçamento das plantas e a variação radial na flexão estática da madeira de Eucalyptus grandis. Para a condução do experimento, foram amostradas seis árvores para cada espaçamento: 2,0 x 1,0 m, 3,0 x 1,0 e 0 x 1,5 m, totalizando 18 indivíduos aos sete anos de idade. Posteriormente, o primeiro registro de cada amostra foi seccionado em placas radiais e depois transformado em corpos de prova, identificados em intervalos regulares na direção da casca da medula, com dimensões de 2,5 x 2,5 x 41,0 cm, para realizar o teste de flexão estática mecânica, seguindo as recomendações da ASTM D-143. Os resultados da resistência mecânica mostraram uma variação na direção da casca da medula, onde os maiores valores de Módulo de Elasticidade (MOE), Módulo de Ruptura (MOR) e Tensão do Limite Proporcional (TPL) estavam próximos da casca. No entanto, o espaçamento não alterou o MOE, MOR e TLP do material submetido à flexão estática. Assim, apenas a posição radial influencia na qualidade da madeira. Os valores das propriedades mecânicas estudadas tiveram um aumento no sentido medula-casca, sendo mais acentuados na região próxima a casca.

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Crescimento e qualidade energética da madeira de Tachigali vulgaris sob diferentes espaçamentos

Cited by 8 publications

References 0 publications

WOOD VOLUMETRY OF Tachigali vulgaris PURE PLANTATIONS IN DIFFERENT PLANTING SPACINGS

WOOD VOLUMETRY OF Tachigali vulgaris PURE PLANTATIONS IN DIFFERENT PLANTING SPACINGS

Bark characterization of Tachigali guianensis and Tachigali glauca from the Amazon under a valorization perspective

Flexão estática de madeira de Eucalyptus grandis: espaçamento e efeito da variação radial

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