Wood Quality of Chestnut: Relationship between Ring Width, Specific Gravity, and Physical and Mechanical Properties

Romagnoli, Manuela; Cavalli, Daniela; Spina, Stefano

doi:10.15376/biores.9.1.1132-1147

Cited by 23 publications

(20 citation statements)

References 7 publications

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“…Hapla and Becker (1990) point out a small association between density and a considerable variability of latewood density. Romagnoli et al (2014) reported a decrease in density with the increasing width of annual rings.…”

Section: Annual Ring Width and Its Correlation With Wood Density And mentioning

confidence: 98%

Wood Density of Northern Red Oak and Pedunculate Oak Grown in Former Brown Coal Mine in the Czech Republic

Zeidler

Borůvka

2016

BioResources

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This study deals with the characteristics of wood of two different species of oaks, the non-native northern red oak (Quercus rubra L.) and the native pedunculate oak (Quercus robur L.), growing in a reclaimed surface brown coal mine in the Czech Republic. The differences in the wood density of the aforementioned species, including the impact of position in the trunk, were examined. The impact of annual ring width and the proportion of latewood on density were also evaluated. The density of Q. robur wood reached 707 kg·m -3 , which was significantly higher than that of the North American species, which reached 654 kg·m -3 . Moreover, in the radial direction, the density increased in the direction from the pith toward the bark for both Q. rubra, and Q. robur. In the vertical direction, the density reached its highest value at the basal part of the trunk, but statistically, this assertion was only significant for Q. rubra. The effects of annual ring width and the proportion of latewood on density were shown to be statistically very low for both oak species.

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Section: Annual Ring Width and Its Correlation With Wood Density And mentioning

confidence: 98%

Wood Density of Northern Red Oak and Pedunculate Oak Grown in Former Brown Coal Mine in the Czech Republic

Zeidler

Borůvka

2016

BioResources

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“…Several studies similarly reported decreased MOR in softwood and hardwood species (Repellin & (2014) demonstrated the modification in bending strength (MOR) was due to mass loss following heat treatment, and although it was not possible to measure the mass loss in this experiment, some general comments can be made based on the knowledge that MOR typically exhibits a positive relationship to wood density (Zobel & Van Buijtenen 1989, Nocetti et al 2012, Romagnoli et al 2014. In the present study, the density reduction following heat treatment was not as high as expected, particularly when compared to the observed change in strength.…”

Section: Resultsmentioning

confidence: 88%

Physical and mechanical characteristics of poor-quality wood after heat treatment

Romagnoli¹,

Cavalli²,

Pernarella³

et al. 2015

iForest

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© iForest -Biogeosciences and Forestry IntroductionHigh-temperature heat treatment is considered a suitable method to improve wood characteristics. It reduces toxic chemical applications normally required to increase wood durability (Kandem et al. 2002, Welzbacher & Rapper 2007, Mohareb et al. 2010 and enhance dimensional stability, reducing the hygroscopic behavior of the material (Kortelainen et al. 2006). High-temperature treatment can be viewed as a type of wood modification, due to the possibility of controlling color changes (Bekhta & Niemz 2003, Johanson & Moren 2006, Esteves et al. 2007a, 2008 and mechanical performance (Bekhta & Niemz 2003, Welzbacher et al. 2007, Bal 2014. The process results in a new material in terms of durability, woodwater relationships and some mechanical properties, which exhibits performance dependent on the specific high-temperature treatment conditions (Militz 2002, 2008, but the wood product does not present any environmental hazards in its disposal (Hillis 2006). The final product typically has the disadvantage of reduced mass and mechanical performance, although some difference in degree of change has been observed between softwoods and hardwoods depending on the treatment method (Kocaefe et al. 2010, Li et al. 2011.Therefore, the overall extent of modification and the final result of the process is quite variable. In this study, we assessed heat treatment effects on Corsican pine and Douglas fir wood properties obtained from a conifer reforestation site in Italy, with particular consideration of different sapwood and heartwood behavior. This timber is considered poor quality and is currently used as biomass for energy or packaging. Materials and methods Study area Forty Douglas fir (Pseudotsuga menziesii)and 40 Corsican Pine (Pinus nigra ssp. laricio) trees were sampled in an artificial mixed stand in Poggio Nibbio near Viterbo, Central Italy (latitude 42° 22′ N, longitude 12° 10′ W). Trees were arranged in rows with a cross-distance of 4 m; the stand was thinned to promote tree regeneration and introduction of indigenous hardwoods. The harvested wood is generally of poor quality due to the fact that the trees have grown quite fast, and not straight, producing large rings that contain a high proportion of earlywood. The sapwood is also quite large, particularly in Corsican pine.From each of the eighty trees sampled, single boards 6 cm thick, 80 cm long, and 7 cm in width were produced and subsequently crosscut to obtain two half-boards of approximately 40 cm in length. From these two half boards, we obtained twin specimens measuring 2 × 2 cm in the transverse radial and tangential directions, and 40 cm longitudinally. The wood samples were largely juvenile, approximately 10 years in cambial age, and evidence of reaction wood was not observed in any samples analyzed. For each of the 2 × 2 × 40 cm sample pairs, one sample was heat treated, and the second sample was left untreated. Subsequently, two blocks measuring 2 × 2 × 3 cm in size were cut from the end of each sample to...

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“…Il diradamento è pratica indispensabile per mantenere un ritmo di accrescimento elevato e costante anche al fine di limitare la cipollatura (Leccese, 2000), evitando di realizzare diradamenti tardivi che modifichino bruscamente il ritmo incrementale e possano altresì generare un alto rischio di tale difetto (Fonti et al, 2002;Becagli et al, 2006;Romagnoli et al, 2014). Spina e Romagnoli (2010) hanno osservato che il legno di castagno nei cedui dei monti Cimini e Vicani è più colpito dalla cipollatura rispetto ad altre provenienze italiane.…”

Section: Cedui DI Castagnounclassified

Caratteristiche produttive e gestione dei cedui in Italia

Quatrini¹,

Mattioli²,

Romano³

et al. 2017

IFM

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I soprassuoli forestali governati a ceduo rappresentano una parte consistente dei boschi italiani. Al fine di una gestione efficace dal punto di vista ambientale ed economico-finanziario è opportuna una conoscenza approfondita delle specifiche caratteristiche di questo sistema selvicolturale. Questa nota si propone di offrire un aggiornamento e una sintesi degli aspetti più rilevanti di produttività e gestione dei principali tipi di ceduo in Italia, attraverso l'analisi dei principali contributi disponibili in merito nella letteratura specializzata. Viene messa in evidenza la necessità di razionalizzare la gestione selvicolturale, dedicando maggiori sforzi al miglioramento della funzionalità del ceduo, legando gli aspetti produttivi con quelli ambientali e paesaggistici.Parole chiave: gestione forestale; selvicoltura; produzione legnosa. Key words: forest management; silvicultural system; wood production.

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Wood Quality of Chestnut: Relationship between Ring Width, Specific Gravity, and Physical and Mechanical Properties

Cited by 23 publications

References 7 publications

Wood Density of Northern Red Oak and Pedunculate Oak Grown in Former Brown Coal Mine in the Czech Republic

Wood Density of Northern Red Oak and Pedunculate Oak Grown in Former Brown Coal Mine in the Czech Republic

Physical and mechanical characteristics of poor-quality wood after heat treatment

Caratteristiche produttive e gestione dei cedui in Italia

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