Longitudinal and radial variation of extractives and total lignin contents in a clone of Eucalyptus grandis W.Hill ex Maiden x Eucalyptus urophylla S. T. Blake

Arantes, Marina Donária Chaves; Trugilho, Paulo Fernando; Lima, José Tarcísio; Carneiro, Angélica de Cássia Oliveira; Alves, Eduardo; Guerreiro, Mário César

doi:10.1590/s0104-77602011000300001

Cited by 12 publications

(5 citation statements)

References 5 publications

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“…The extractive content of Eucalyptus spp. ranged from 2.3% to 3.0%, which confirms the findings of Arantes et al (2011) [40]. Gomide et al (2010) [41] observed a variation from 1.2% to 7.3% in 75 clones of Eucalyptus spp.…”

Section: Ash Extractive and Lignin Contentssupporting

confidence: 88%

Determination of the Chemical Composition of Eucalyptus spp. for Cellulosic Pulp Production

Vieira

Arriel

Zanuncio

et al. 2021

Forests

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The chemical composition of wood is important to assess the quality of this raw material for the industry of cellulosic pulp production. The purpose of this work was to determine the chemical composition of Eucalyptus spp. grown for cellulosic pulp production. Ten Eucalyptus spp. clones with six years of age, located in the municipality of Itamarandiba, Minas Gerais, Brazil, were used. Quantification was obtained for extractives, monosaccharides, uronic acids, acetates, lignin, ash and the phenolic composition of the extracts. In average, clones showed around 2.7% extractives, with a predominance of polar compounds soluble in ethanol and water; 27.7% lignin and 0.3% ash. Glucose was the main sugar detected (64.2%), followed by xylose (19.3%). The main components of the extractives were steroids, fatty acids and aromatic acids, followed by smaller amounts of substituted alkanoic acids, fatty alcohols, glycerol derivatives and triterpenes. The ethanol–water extracts presented total phenol contents ranging from 321.4 to 586.6 mg EAG/g of extract, tannins from 28.1 to 65.1 mg catechin/g of extract and flavonoids from 73.6 to 256.9 mg catechin/g of extract. Clones with a higher holocellulose amount and a lower lignin content showed a higher potential for cellulosic pulp production. These findings are important for the development of high-quality wood based on important traits for the pulp and paper sector.

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Section: Ash Extractive and Lignin Contentssupporting

confidence: 88%

Determination of the Chemical Composition of Eucalyptus spp. for Cellulosic Pulp Production

Vieira

Arriel

Zanuncio

et al. 2021

Forests

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“…The clone A showed a lower extractive content, while the clones D and F had the highest (Table 1). The extractive content of the eight clones evaluated was lower than those reported for seven-yearsold Eucalyptus grandis × Eucalyptus urophylla, Eucalyptus urophylla and Eucalyptus paniculata, 3.41 and 9.12% (Arantes et al, 2011;Zanuncio et al, 2014). The proportion of extractives in the xylem is higher at the heartwood (Adamapoulos et al, 2005), the process that turns sapwood into heartwood is incipient in twoyears-old trees (Sousa et al, 2013;Gominho et al, 2015), resulting in woods with low extractives content.…”

Section: Wood Chemical Characterizationmentioning

confidence: 72%

CHEMICAL AND ENERGETIC CHARACTERIZATION OF Eucalyptus grandis × Eucalyptus urophylla CLONES SUBJECT TO WIND DAMAGE

et al. 2019

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Wind damages are common in forest plantations and the use of this wood can minimize losses. The objective was to evaluate the chemical composition and the energetic potential of wood and charcoal from trees subject to wind damage. Eight (A to H) two-years-old Eucalyptus grandis × Eucalyptus urophylla clones were selected in a region where wind damage is frequent. The basic density, calorific value, chemical composition of wood and calorific value, immediate chemistry and gravimetric yield of charcoal were determined for all clones. Materials with high lignin content and low S/G ratio had higher gravimetric yield. The energy density of wood and charcoal showed high relationship with the basic and apparent relative density, respectively. All materials showed potential for bioenergy, but the clone E stood out with higher gravimetric yield and energy density.

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“…Santos et al [5] and Arantes et al [24] reported the mean values of total lignin 32.0 and 29.8%, respectively. The chemical composition of wood influences the yield and the quality of charcoal.…”

Section: Chemical Compositionmentioning

confidence: 99%

Quality of Wood and Charcoal fromEucalyptusClones for Ironmaster Use

Pereira

Oliveira

Carvalho

et al. 2012

International Journal of Forestry Research

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Considering the wide variety of species and clones of Eucalyptus cultivated in Brazil, it is necessary to search for new information on wood properties, so that the selection of genetically superior material may be successful. The present study aimed to determine the properties of wood and charcoal from different clones of Eucalyptus spp. Six clones at the age of 7.5 years were evaluated and the samples were from a clonal, located in the city of Lassance, Minas Gerais, Brazil. Basic density, chemical composition, and higher heating value were determined. Carbonizations in a laboratory kiln were done and the levels of volatile matter, ash, and fixed carbon, higher heating value, and bulk density of the charcoal produced were determined. Evaluated genetic materials showed differences in their properties. According to research results, several properties of wood should be considered together for the selection of clones for charcoal production. However, basic density and chemical composition of wood, especially high contents of lignin and low contents of extractives, are the properties that had more influence on charcoal yield and its quality. Concerning charcoal production for steelmaking, clone 6 stood out and, conversely, clone 4 showed inferior properties to those of others.

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Longitudinal and radial variation of extractives and total lignin contents in a clone of Eucalyptus grandis W.Hill ex Maiden x Eucalyptus urophylla S. T. Blake

Cited by 12 publications

References 5 publications

Determination of the Chemical Composition of Eucalyptus spp. for Cellulosic Pulp Production

Determination of the Chemical Composition of Eucalyptus spp. for Cellulosic Pulp Production

CHEMICAL AND ENERGETIC CHARACTERIZATION OF Eucalyptus grandis × Eucalyptus urophylla CLONES SUBJECT TO WIND DAMAGE

Quality of Wood and Charcoal fromEucalyptusClones for Ironmaster Use

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