Juvenile Wood Characterization of Eucalyptus botryoides and E. maculata by using SilviScan

Knapic, Sofia; Grahn, Thomas; Lundqvist, Sven‐Olof; Pereira, Helena

doi:10.15376/biores.13.2.2342-2355

Cited by 4 publications

(4 citation statements)

References 19 publications

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“…The properties of the mixed LVL were inbetween those of the two different species. Knapic et al studied about variation in wood stiffness of eucalyptus and concluded that the variation was explained by microfibril angle (MFA) and wood density variations [11]. The innerwood veneer contained juvenile wood which differed from mature wood in MFA and density.…”

Section: Lvl Density and Moe From The Bending Testsmentioning

confidence: 99%

Utilization of Chinese fast-growing trees and the effect of alternating lamination using mixed-species eucalyptus and poplar veneers

et al. 2021

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Over the past few decades, the sustainable forest area in China has increased remarkably, with 2400 million cubic meters of eucalyptus produced in 2018 in Guangxi which is the largest plantation area in China. In this study, the effect of alternating lamination using soft poplar veneers and hard eucalyptus veneers, on the mechanical properties of laminated veneer lumber (LVL), was examined. Eucalyptus and poplar veneers were imported from China to Japan to manufacture the LVL. For both eucalyptus and poplar veneers, the pith side (innerwood) sheets were lighter in density than the bark side (outerwood) sheets. The specific Young’s modulus of alternating LVL with hard eucalyptus veneers and soft poplar veneers was smaller than that of the mono-species LVL of eucalyptus and poplar. Strain distributions were obtained with the compression test by using the digital image correlation method. Normal strains showed that the hard eucalyptus layer behaved as a thin plate, whereas the soft poplar layer mitigated the movement of the hard eucalyptus layer. Alternating lamination decreased the variation in the elastic modulus of LVL made from fast-growing species. Therefore, the soft layers mitigated the movement of the hard layers, which had large variations in mechanical properties.

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Section: Lvl Density and Moe From The Bending Testsmentioning

confidence: 99%

Utilization of Chinese fast-growing trees and the effect of alternating lamination using mixed-species eucalyptus and poplar veneers

et al. 2021

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“…For a clonal population of Eucalyptus grandis x Eucalyptus camaldulensis it was found that the basic density and volumetric shrinkage decrease in the base-top direction of the tree and for MFA there is a marked decrease in the base up to 25% of the total height, and from that point onwards a more moderate decrease, up to the total height of the tree (Wessels et al, 2016). The MFA was influenced by radial and longitudinal variation in Eucalyptus botryoides and Eucalyptus maculata (Knapic et al, 2018). Cell walls with very low MFA tend to have greater tangential retraction, whereas cell walls with very high MFA tend to have greater longitudinal retraction.…”

Section: Resultsmentioning

confidence: 97%

Variation in wood properties of 26-year-old Handroantus impetiginosus cultivated in Luiz Antônio, SP

et al. 2022

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Provenance testing can provide information on silvicultural behavior and wood quality of species for selection of genetic material for different locations and conservation of the genetic base. The aim of this work was to study the longitudinal variation of basic density, volumetric shrinkage and microfibril angle of wood from two provenances (Assis and Bauru) of Handroantus impetiginosus planted in Luiz Antonio SP. After 26 years of planting, twelve trees were felled, six from each provenance. According to the results obtained, it could be concluded that the analysis of variance (ANOVA) showed that for the provenance there was a significant variation for the volumetric shrinkage of the wood and for basic wood density and microfibril angle the significance of variation did not occur. The basic wood density varied significantly between the different positions, at the height of the tree and for volumetric shrinkage, and for the microfibril angle it did not occur. There is a positive relationship between tree height and basic wood density of wood, for Assis and Bauru provenances.

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“…The part of the cross-section next to the core will have typical features of juvenile wood [ 46 ]. In fast-growing species cultivated on plantations, the differences in structure and properties between juvenile and mature wood are well known [ 47 , 48 , 49 , 50 ].…”

Section: Discussionmentioning

confidence: 99%

Radial Variability of Selected Physical and Mechanical Parameters of Juvenile Paulownia Wood from Extensive Cultivation in Central Europe—Case Study

et al. 2023

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The research on Paulownia cultivation and wood properties is up to date in many countries. However, there are no data on the properties of this wood defined on a microscale, on microtome samples. The main aim of this study was to find the best valorization path for the wood of Paulownia Shang Tong Hybrid F1 from an extensively cultivated plantation established in April 2017 in Poland by determining the tensile strength, the wood density, the strength-to-density ratio, and the modulus of elasticity on a cross-section of the trunk. The wood was collected from extensive plantation, where production is based on the natural resources of the habitat and ambient weather conditions, which is the opposite to the intensive cultivation model, which is the recommended model of Paulownia cultivation. The results of this study show that the mean density of the analyzed samples was approximately 210 kg/m3 when the mean value of the modulus of elasticity (MOE) was approximately 2400 MPa. The mean result for the tensile strength ratio to density was 11.25 km. In the case of anatomical structure, the increasing trend with age was noticed both in fiber and vessel characteristics. The study results provide unique data worldwide about Paulownia wood’s properties based on a cross-section of the trunk, from plantations cultivated in conditions which are not recommended by seedlings producers. The obtained data indicate that the Paulownia wood (examined) from the cultivation in this study has a technical quality similar to that of model-intensive agricultural plantations.

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Juvenile Wood Characterization of Eucalyptus botryoides and E. maculata by using SilviScan

Cited by 4 publications

References 19 publications

Utilization of Chinese fast-growing trees and the effect of alternating lamination using mixed-species eucalyptus and poplar veneers

Utilization of Chinese fast-growing trees and the effect of alternating lamination using mixed-species eucalyptus and poplar veneers

Variation in wood properties of 26-year-old Handroantus impetiginosus cultivated in Luiz Antônio, SP

Radial Variability of Selected Physical and Mechanical Parameters of Juvenile Paulownia Wood from Extensive Cultivation in Central Europe—Case Study

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