Variation of wood color parameters of Tectona grandis and its relationship with physical environmental factors

Moya, Róger; Calvo–Alvarado, Julio

doi:10.1007/s13595-012-0217-0

Cited by 45 publications

(34 citation statements)

References 30 publications

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“…The chemical composition of wood was highly correlated with the lightness of wood especially hemicellulose where decreases in lightness primarily caused by degradation of hemicellulose particularly pentosans (Bekhta & Niemz, 2003;Huang et al, 2012). Moya et al (2012) and Feher et al, (2014) stated a relation between lightness and extractive content in wood. Todorovic et al, (2012) also suggest that MOR correlated with lightness in wood.…”

Section: Discussionmentioning

confidence: 98%

Changes in Colour, Strength and Chemical Properties of Oil Heat Treated 18-Years Old Planted Acacia mangium

Wahab

Ghani²,

Samsi³

et al. 2017

IJB

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This study was carried to investigate changes in the oil heat treated 18-years old of planted Acacia mangium. Harvested trees segregated into bottom, middle and top portions containing heartwood and sapwood were oil heat treated in stainless tank with palm crude oil as heating medium at temperatures of 180 o C, 200 o C and 220 o C for 30, 60 and 90 minutes respectively. The evaluation of the changes in the wood were performed by standards using a Minolta Chroma Meter, TAPPI Standard T204 om-88, TAPPI Standard T203 cm-99, TAPPI Standard T222 cm-02, and BS EN 310:1993 static bending tests. The relationship between the changes in the colour, mechanical and chemical composition, were made using correlation analysis. The result showed oil-heat treatment reduced the lightness of the wood and darkened the both parts of the wood. The strength of the wood reduced slightly after the oil-heat treatment. In the chemical compositions, the percentages of the holocellulose, α-cellulose, hemicellulose and extractive contents decrease with the increase in treatment duration and temperature. The oil heat treatment process at 200°C for duration 60 minutes is recommended for acacia mangium wood as it improved the colour of Acacia mangium and standardized the colour of sapwood and heartwood. The loss in strength at this temperature and duration is acceptable as the treated wood only loss up to 15% strength in MOR and 10.7% in MOE.

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Section: Discussionmentioning

confidence: 98%

Changes in Colour, Strength and Chemical Properties of Oil Heat Treated 18-Years Old Planted Acacia mangium

Wahab

Ghani²,

Samsi³

et al. 2017

IJB

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“…In teak wood, Bhat and Priya (2004) established that timber from low fertility sites produces timber with low mechanical resistance, attributed to a higher amount of parenchyma and low fibers content. Studies conducted by Moya and Pérez (2008), Moya et al (2009), Moya and Calvo-Alvarado (2012) and Kokutse et al (2010a, b) showed variations in wood properties due to changes in climatic conditions and soil fertility where trees were planted. Other studies have shown variations in wood properties due to site effect (Bhat et al 2001Kokutse et al 2004;Pérez and Kanninen 2003;Thulasidas and Bhat 2007).…”

Section: Introductionmentioning

confidence: 97%

General, physical and mechanical properties, termites resistance and drying defects of lumber of Tectona grandis from plantations of different climatic and sites fertility condition

Serrano-Montero

González-Trejos

Córdoba-Foglia

et al. 2015

J Indian Acad Wood Sci

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The influence of climatic and site fertility conditions affect wood quality from fast growing trees. The change in tree diameter, thickness of sapwood, heartwood percentage and bark and pith tissue, physical and mechanical properties, resistance to termite attack and the presence of drying defects on lumber boards were evaluated. Four teak trees (Tectona grandis L.f.) from fast growing plantations in Costa Rica were selected for the study. Teak trees of 11 years old growing in two climatic conditions and two fertility types (high and low fertility) in Costa Rica were studied. The results showed that tree diameter, sapwood thickness, pith diameter and its percentage were higher in the climate with more rainfall and greater fertility. However, the percentage of heartwood and bark were higher at low fertility sites with less rainfall. It was also observed that only sites with low fertility produce modifications in specify gravity, fiber saturation point, initial moisture content, MOR in flexion in green and dry condition, MOE in bending and resistance to termite attack. Incidence and magnitude of defects increased with drying, and were mainly affected when wood comes from younger trees from high fertility sites and growing in tropical moist forest climate.

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“…In addition tree stands can no longer reach maturity in age to get good heartwood quality, in terms of color definition. It was established that the proportion of heartwood which is an important factor for teak wood quality increased with tree age (Bhat, 1995;Kokutse et al, 2004) and during the process of heartwood formation, some chemical processes take place, which improve durability and change the colour of the wood (Datta and Kumar, 1987 ;Higuchi 1997;Moya and Alvarado-Calvo, 2012;Moya et al, 2014). Indeed there is an increasing demand of the Togo dark teakwood on the market (Kokutse et al, 2006).…”

Section: Introductionmentioning

confidence: 99%

Selection of Plus Trees for Genetically Improved Teak Varieties Produced in Benin and Togo

Kokutsè¹,

Akpene²,

Monteuuis³

et al. 2017

Bois for. trop.

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RÉSUMÉ SÉLECTION D'ARBRES « PLUS » POUR LA PRODUCTION DE VARIÉTÉS DE TECK GÉNÉTIQUEMENT AMÉLIORÉES AU BÉNIN ET AU TOGOCette étude vise la sélection d'arbres « plus » sur la base des caractères dendrométriques et des propriétés du bois dans des plantations de teck au Bénin et au Togo. La croissance de 569 arbres dans 5 forêts au Togo et 90 arbres dans 3 forêts au Bénin a été évaluée en mesurant le diamètre à hauteur de poitrine, la hauteur totale et la hauteur du fût. Les propriétés suivantes du bois ont été éva-luées et prises en compte pour la sélec-tion finale d'arbres « plus » : densité, pourcentage de bois de coeur et couleur. La durabilité naturelle du bois de coeur, le point de saturation des fibres, le module d'élasticité et les retraits ont été évalués sur la base de modèles spectroscopiques dans le proche infrarouge, préalablement construits. Nos résultats montrent qu'au Togo la variabilité inter-arbres en forêt est assez forte pour l'accroissement annuel en hauteur (0,81 ± 0,27 m), en circonfé-rence (2,95 ± 1,02 cm) et en hauteur des fûts (10,64 ± 3,51m). Au Bénin, si les performances dendrométriques des arbres ne varient pas de façon significative entre les forêts, pour la hauteur des fûts (10,99 ± 3,80 m), les valeurs du coefficient de variation sont plus élevées (40 %) pour la forêt de Koto. Prenant en compte les propriétés du bois, la sélection finale multicritères montre que les peuplements d'Avétonou et de Tchorogo au Togo constituent un groupe homogène affichant les plus fortes valeurs pour la densité du bois et le pourcentage de bois de coeur. Les arbres des forêts de Haho-Baloe et Eto ont des valeurs plus faibles pour la durabilité naturelle, le module d'élasticité, le pourcentage de bois de coeur et la densité du bois. Au Bénin, les arbres de la forêt d'Agrimey ont une densité plus élevée mais les valeurs pour le point de saturation des fibres, la durabilité naturelle et le retrait du bois sont similaires pour les trois forêts. La variabilité des performances dendrométriques et de la qualité du bois des arbres-candidat nous ont permis de sélectionner 33 arbres « plus ».Mots-clés : peuplements de teck, arbre « plus », sélection, croissance, proprié-tés du bois, Bénin, Togo. ABSTRACT SELECTION OF PLUS TREES FOR GENETICALLY IMPROVED TEAK VARIETIES PRODUCED IN BENIN AND TOGOThe aim of this study is to select "Plus Trees" based on dendrometric characteristics and wood properties in teak plantations in Benin and Togo. For this purpose, growth performance was assessed in 569 trees in 5 forests in Togo and 90 trees in 3 forests in Benin, based on diameter at breast height, total height and bole height measurements. Wood properties -density, percentage of heartwood and colour -were also measured for the final selection of Plus trees. Heartwood natural durability, fibre saturation point, modulus of elasticity and shrinkage were assessed against previous near infrared spectroscopy models. The results showed that in Togo, inter-tree variability in the forests was relatively high for Annual Height (0.81 ±...

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Variation of wood color parameters of Tectona grandis and its relationship with physical environmental factors

Cited by 45 publications

References 30 publications

Changes in Colour, Strength and Chemical Properties of Oil Heat Treated 18-Years Old Planted Acacia mangium

Changes in Colour, Strength and Chemical Properties of Oil Heat Treated 18-Years Old Planted Acacia mangium

General, physical and mechanical properties, termites resistance and drying defects of lumber of Tectona grandis from plantations of different climatic and sites fertility condition

Selection of Plus Trees for Genetically Improved Teak Varieties Produced in Benin and Togo

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