Comparison of some physical, mechanical and anatomical properties of smallholder plantation teak (Tectona grandis Linn. f.) from dry and wet localities of Ghana

Amoah, Martin; Inyong, Stephen

doi:10.1007/s13196-019-00248-7

Cited by 17 publications

(20 citation statements)

References 24 publications

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“…Some reference values for freijó wood quality can be obtained from Alves et al (2013) and Lima et al (2013), who found ρ a and ρ b , for wood from natural forests of about 590 and 504 kg m -3 , respectively. The characteristics of our freijó samples were similar to those of other species cultivated worldwide, such as teak (Tectona grandis), with values of ρ a and ρ b around 580 and 430 kg m -3 , respectively (Rizanti et al 2018;Amoah and Inyong, 2019;Kenzo et al 2020).…”

Section: Physical Propertiessupporting

confidence: 65%

Physico-mechanical properties of the wood of freijó, Cordia goeldiana (Boraginacea), produced in a multi-stratified agroforestry system in the southwestern Amazon

et al. 2021

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Agroforestry systems (AFSs) integrate, through sustainable practices, agricultural and forest crops for the production of wood and food, providing environmental services, and conserving biodiversity. The freijó (Cordia goeldiana) has potential for cultivation in the Amazon for timber purposes, but data on the characteristics of its wood produced in AFSs are scarce. Our objective was to determine the physical-mechanical properties and suggest technological applications of freijó wood produced in a multi-stratified AFS established in the state of Rondônia, Brazil in 1996. Agricultural and forest species were established in the AFS in double rows with 5.0-m x 2.5-m spacing. Three 19-year-old freijó trees were harvested for chemical, physical (density and dimensional stability), and mechanical (compression, static bending, Janka hardness, and shear strength) characterization of the wood. The wood presented a chemical composition similar to tropical hardwoods, was moderately heavy (582.63 kg m-3), and had high dimensional stability in comparison with other consecrated woods on the market (longitudinal, radial, and tangential retraction = 0.25, 4.27, and 6.83%, respectively). The values determined for parallel (32.32 MPa) and perpendicular compression (8.02 MPa), specific strength (55.32 MPa kg-1 m-3), parallel (2373.33 N) and perpendicular Janka hardness (2326.67 N), strength to static bending (63.5 MPa), and shear (5.94 MPa) were similar to the values observed in other high-density tropical woods grown in either monoculture plantations or natural forests. The wood under study is suitable for manufacture of high-value-added products, such as fine furniture, residential floors, musical instruments and structural pieces.

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Section: Physical Propertiessupporting

confidence: 65%

Physico-mechanical properties of the wood of freijó, Cordia goeldiana (Boraginacea), produced in a multi-stratified agroforestry system in the southwestern Amazon

et al. 2021

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“…The strength of wood is related to its density, according to Aguma, Q., & Ogunsanyo, O. Y., (2019) [13]. Most heavy construction species, such as Sterculia rhinopetala (wawabima) (127 N/mm 2 ), Celtis mildbraedii (essa) (104 N/mm 2 ), and Piptadeniastrum africanum (dahoma) (109 N/mm 2 ) and Amaoh, M., & Inyong, S. (2019) [14], have lower modulus of rupture mean values than N. papaverifera.…”

Section: Mechanical Variationsmentioning

confidence: 99%

Variations of Stem and Branch Wood Properties of <i>Nesogordonia papaverifera</i> in Ghana

Kwaku¹,

Tobias²,

Frimpong-Mensah³

2022

JPS

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The characteristics of Nesogordonia papaverifera stemwood and branchwood were investigated. Within Ghana's middle belt, five mature trees with identical diameter at breast height were chosen. Mechanical characteristics and basic density were determined in accordance with British Standard BS 373 and ASTMD 2395, respectively. The IAWA list of microscopic features for hardwood identification was followed by anatomical features. Basic density, mechanical, and anatomical parameters all had a positive connection (P<0.05). Branchwood had a little higher basic density than stemwood, and heartwood had a slightly higher basic density than sapwood. There were minor changes in MoE, MoR, compression, shear, and hardness between the heartwood and sapwood. The stem and branch, on the other hand, were comparable. Fibre percentages were higher in stemwood than branchwood and in heartwoods than sapwoods anatomically. There were more vessels in the branch than in the stem, and in the sap than in the heart. The branchwood of N. papaverifera had medium strength qualities that were comparable to most medium construction species' stemwood and could thus be used in addition to their stemwood. The study has offered information on N. papaverifera branchwood that may inspire trust and interest in the use of branchwood as a supplemental material in the manufacture of wood products.

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“…Outra espécie que contribui para essa produção é a teca, originária da Ásia, amplamente utilizada na construção naval e na produção de móveis finos e decks, devido apresentar madeira de alta durabilidade, boa estabilidade dimensional, alta trabalhabilidade e qualidade estética. Estima-se que 20% da produção total desta espécie no País (94 mil ha), esteja concentrada no estado do Pará (18,8 mil ha) (Amoah & Inyong, 2019;IBÁ, 2019;Pangastuti, Bintoro & Duryat, 2018 O projeto Jari -controlado pelo grupo ORSA desde 2000 -iniciou a produção de pasta química para celulose em 1978, a partir da plantação de gmelina, pinus e eucalipto, tendo exportado cerca de 231 milhões de dólares em 2010 (Costa et al, 2017). Hoje, a empresa procura um sócio, para tentar quitar suas dívidas de cerca de R$ 1,2 bilhão.…”

Section: Municípiounclassified

Análise da conjuntura do mercado de madeira de reflorestamento no Estado do Pará

Costa

Suzuki

Barros

et al. 2020

RSD

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O Brasil é um dos principais produtores de madeira reflorestada do mundo, ocupando a nona posição no ranking de áreas de povoamentos florestais. O plantio de floresta pode ser uma alternativa significativa para fortalecer o agronegócio sustentável na Amazônia, ao mesmo tempo que possibilitaria a redução da pressão sobre os recursos naturais da região. O objetivo desta pesquisa é analisar a conjuntura do mercado de floresta plantada no estado do Pará, como forma de compreender sua participação relativa no contexto nacional, caracterizando as principais espécies cultivadas, os municípios produtores, as empresas com atuação e expertise no ramo e ressaltar os desafios e oportunidades no setor. Os dados utilizados foram obtidos junto ao Instituto Brasileiro de Geografia e Estatística (IBGE), referente ao período entre 2013 a 2019. As variáveis analisadas foram produção em metros cúbicos (m³), valor da produção em reais (R$), área colhida em hectares (ha), preço em reais por metros cúbicos (R$.m-³). Verificou-se que o estado do Pará participa com 1,9% da produção nacional, ocupando a 11ª posição no ranking brasileiro de produção. O crescimento da produção paraense expande-se a partir do ano de 2015, principalmente a partir do cultivo do eucalipto. O uso de técnicas no manejo florestal de precisão, modernos projetos de plantio no estado, contribuem para uma maior produção de madeira plantada. Os povoamentos florestais são alternativas renováveis de grande potencial econômico, sobretudo para ocupar áreas já alteradas. Contudo, é notável que ainda exista poucos estudos relacionados ao plantio comercial de outras espécies adaptadas a realidade regional.

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Comparison of some physical, mechanical and anatomical properties of smallholder plantation teak (Tectona grandis Linn. f.) from dry and wet localities of Ghana

Cited by 17 publications

References 24 publications

Physico-mechanical properties of the wood of freijó, Cordia goeldiana (Boraginacea), produced in a multi-stratified agroforestry system in the southwestern Amazon

Physico-mechanical properties of the wood of freijó, Cordia goeldiana (Boraginacea), produced in a multi-stratified agroforestry system in the southwestern Amazon

Variations of Stem and Branch Wood Properties of <i>Nesogordonia papaverifera</i> in Ghana

Análise da conjuntura do mercado de madeira de reflorestamento no Estado do Pará

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Comparison of some physical, mechanical and anatomical properties of smallholder plantation teak (Tectona grandis Linn. f.) from dry and wet localities of Ghana

Cited by 17 publications

References 24 publications

Physico-mechanical properties of the wood of freijó, Cordia goeldiana (Boraginacea), produced in a multi-stratified agroforestry system in the southwestern Amazon

Physico-mechanical properties of the wood of freijó, Cordia goeldiana (Boraginacea), produced in a multi-stratified agroforestry system in the southwestern Amazon

Variations of Stem and Branch Wood Properties of &lt;i&gt;Nesogordonia papaverifera&lt;/i&gt; in Ghana

Análise da conjuntura do mercado de madeira de reflorestamento no Estado do Pará

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Variations of Stem and Branch Wood Properties of <i>Nesogordonia papaverifera</i> in Ghana