Modelling wood property variation among Tasmanian Eucalyptus nitens plantations

2021 ◽  
Vol 491 ◽  
pp. 119203
Author(s):  
Mario Vega ◽  
Peter Harrison ◽  
Matthew Hamilton ◽  
Rob Musk ◽  
Paul Adams ◽  
...  
Keyword(s):  
Wood Property ◽  
Eucalyptus Nitens ◽  
Property Variation

scholarly journals Non-Destructive Evaluation Techniques and What They Tell Us about Wood Property Variation

Forests ◽  
2019 ◽  
Vol 10 (9) ◽  
pp. 728 ◽  
Author(s):  
Laurence Schimleck ◽  
Joseph Dahlen ◽  
Luis A. Apiolaza ◽  
Geoff Downes ◽  
Grant Emms ◽  
...  
Keyword(s):  
Multiple Scales ◽  
Wood Property ◽  
Wood Properties ◽  
Product Performance ◽  
Detailed Knowledge ◽  
Field Equipment ◽  
Property Variation ◽  
Non Destructive Evaluation ◽  
The Impact ◽  
Non Destructive

To maximize utilization of our forest resources, detailed knowledge of wood property variation and the impacts this has on end-product performance is required at multiple scales (within and among trees, regionally). As many wood properties are difficult and time-consuming to measure our knowledge regarding their variation is often inadequate as is our understanding of their responses to genetic and silvicultural manipulation. The emergence of many non-destructive evaluation (NDE) methodologies offers the potential to greatly enhance our understanding of the forest resource; however, it is critical to recognize that any technique has its limitations and it is important to select the appropriate technique for a given application. In this review, we will discuss the following technologies for assessing wood properties both in the field: acoustics, Pilodyn, Resistograph and Rigidimeter and the lab: computer tomography (CT) scanning, DiscBot, near infrared (NIR) spectroscopy, radial sample acoustics and SilviScan. We will discuss these techniques, explore their utilization, and list applications that best suit each methodology. As an end goal, NDE technologies will help researchers worldwide characterize wood properties, develop accurate models for prediction, and utilize field equipment that can validate the predictions. The continued advancement of NDE technologies will also allow researchers to better understand the impact on wood properties on product performance.

scholarly journals Inter- and intra-annual wood property variation in juvenile wood between six Sitka spruce clones

Silva Fennica ◽  
2017 ◽  
Vol 51 (4) ◽  
Author(s):  
Liam Donnelly ◽  
Sven-Olof Lundqvist ◽  
Conor O’Reilly
Keyword(s):  
Juvenile Wood ◽  
Wood Property ◽  
Sitka Spruce ◽  
Property Variation

Wood Property Variation in Sandalwood

2021 ◽  
pp. 97-110
Author(s):  
E. V. Anoop ◽  
Pavin Praize Sunny ◽  
M. C. Anish
Keyword(s):  
Wood Property ◽  
Property Variation

Temporal variation in δ13C, wood density and microfibril angle in variously irrigated Eucalyptus nitens

2009 ◽  
Vol 36 (1) ◽  
pp. 1 ◽  
Author(s):  
David M. Drew ◽  
E. Detlef Schulze ◽  
Geoffrey M. Downes
Keyword(s):  
Water Stress ◽  
Temporal Variation ◽  
Wood Density ◽  
Stable Carbon Isotope ◽  
Microfibril Angle ◽  
Wood Property ◽  
Wood Properties ◽  
Eucalyptus Nitens ◽  
Stable Carbon ◽  
Over Time

Wood can serve as a record of past climate, recording tree responses to changing conditions. It is also valuable in understanding tree responses to environment to optimise forest management. Stable carbon isotope ratios (δ13C), wood density and microfibril angle (MFA) are potentially useful wood property parameters for these purposes. The goal of this study was to understand how δ13C varied over time in response to cycles of soil drying and wetting and to variation in temperature in Eucalyptus nitens Deane & Maiden, in concert with wood density and MFA. δ13C increases did not necessarily occur when water stress was highest, but, rather, when it was relieved. Our hypothesis is that this was a result of the use of previously fixed carbohydrate reserves when growth and metabolic activity was resumed after a period of dormancy. MFA in particular showed concomitant temporal variation with δ13C. A peak in δ13C may not coincide temporally with an increase in water stress, but with a decrease, when higher growth rates enable the final incorporation of earlier stored photosynthate into mature wood. This has implications for using δ13C as a tool to understand past environmental conditions using radial measurements of wood properties. However, interpreting this data with other wood properties may be helpful for understanding past tree responses.

Vessel and Fibre Property Variation in Eucalyptus Globulus and Eucalyptus Nitens: Some Preliminary Results

IAWA Journal ◽  
1998 ◽  
Vol 19 (2) ◽  
pp. 111-130 ◽  
Author(s):  
Irene Hudson ◽  
Lawrie Wilson ◽  
Kim Van Beveren
Keyword(s):  
Eucalyptus Globulus ◽  
Eucalyptus Nitens ◽  
Annual Rings ◽  
Fibre Property ◽  
Fibre Properties ◽  
Property Variation ◽  
Preliminary Results ◽  
False Rings ◽  
Free Area

Vessel areas and distributions in Eucalyptus globulus and E. nitens vary in a consistent, significant and predictable way from pith to bark and within annual rings. Trends in vessel areas and distributions can be quantified despite the presence of indistinct annual rings and false rings. There is evidence of a vessel free area in first earlywood in E. nitens in which fibre properties are predictably different. At 5% height the vessel free area in the 1991 and 1992 annual rings is 13% and 1O% respectively.

scholarly journals Comparison of whole-tree wood property maps based on near-infrared spectroscopic calibrations utilizing data at different spatial resolutions

Holzforschung ◽  
2019 ◽  
Vol 74 (1) ◽  
pp. 20-32
Author(s):  
Laurence R. Schimleck ◽  
Finto Antony ◽  
Christian Mora ◽  
Joseph Dahlen
Keyword(s):  
Near Infrared ◽  
Wood Property ◽  
Cost Effective ◽  
Specific Model ◽  
Distinct Advantage ◽  
Pulp Yield ◽  
Dry Density ◽  
Property Variation ◽  
The Impact ◽  
Whole Tree

AbstractNear-infrared (NIR) spectra or NIR-hyperspectral images obtained from radial strips or wood discs provide a cost-effective methodology for examining wood property variation within trees. The calibration used for wood property prediction is critical and can be obtained using two fundamentally different approaches. One involves using a spatial-specific model where wood property data and corresponding spectral data are measured at the same resolution for calibration and prediction, e.g. 10-mm radial increments. The other provides a spatial-interpolated model and involves measuring a property on a broad-scale, e.g. whole-tree, calibrating this data against NIR spectra representing the equivalent scale and then using the calibration to predict the property at higher resolution. To understand the impact of these approaches on subsequent patterns of within-tree variation, whole-tree air-dry density (ADD) and coarseness maps, based on data obtained using the two different approaches, were compared. Patterns of ADD and coarseness variation were comparable indicating that both approaches can be utilized to examine within-tree variation. Spatial-interpolated models have a distinct advantage; being based on whole-tree (or disc) samples, they greatly reduce the cost of wood property analysis and allow the development of maps for properties that are costly and difficult to measure, for example, pulp yield.

Radial variation in pernambuco (Caesalpinia echinata) wood properties

IAWA Journal ◽  
2017 ◽  
Vol 38 (1) ◽  
pp. 99-104
Author(s):  
Laurence R. Schimleck ◽  
Jorge Luis Monteiro de Matos ◽  
Charles Espey
Keyword(s):  
Management Practices ◽  
Wood Quality ◽  
Microfibril Angle ◽  
Wood Property ◽  
Wood Properties ◽  
Average Density ◽  
Radial Variation ◽  
Raw Material ◽  
Property Variation ◽  
Caesalpinia Echinata

Caesalpinia echinata Lam. (pernambuco or pau-brasil) is recognized as the premier raw material for manufacturing stringed instrument bows. Several studies have identified properties considered important in determining the suitability of pernambuco wood for bow manufacture including density, modulus of elasticity (MOE), and, possibly, microfibril angle (MFA). No research has been conducted on how these properties vary within individual trees; however, an understanding of how pernambuco wood properties vary within trees is important as it may assist in the identification of trees or provenances most suited for the establishment of plantations, aid in developing an understanding of management practices on wood property variation for plantation-grown pernambuco and also facilitate the identification of regions within trees that possess optimal properties for bow manufacture. Radial variation in density, MFA and MOE was examined using SilviScan for three radial strips representing differing levels of wood quality in terms of perceived suitability for making high-quality bows. The lowest quality sample showed considerable radial variation compared to the higher quality samples for all properties and it also had the lowest average density. It was not possible to identify a strong pith to bark trend for any of the wood properties examined.

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