Effects of site on fibre, kraft pulp and handsheet properties of Eucalyptus globulus

Wimmer, Rupert; Downes, Geoffrey M.; Evans, Robert; French, Jim

doi:10.1051/forest:2008039

Cited by 24 publications

(14 citation statements)

References 19 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…This contrasts with findings of Wimmer et al (2008) who reported higher average MFA at slowgrowing compared to fast-growing E. globulus sites in Tasmania. In that study, the difference was probably a function of earlywood/latewood effects.…”

Section: Wood Properties In Slow and Fast Growing Treescontrasting

confidence: 56%

Variations temporelles à haute résolution des propriétés du bois d’Eucalyptus globulus irrigués et non irrigués

Drew¹,

Downes²,

O’Grady³

et al. 2009

Ann. For. Sci.

View full text Add to dashboard Cite

Abstract• Environmental determinants of wood properties variation were examined in Eucalyptus globulus, a globally important hardwood plantation species, in southern Tasmania, Australia.• Radial variation in wood properties, measured with the SilviScan system, were re-scaled from distance to time abscissa using stem radial growth data measured with dendrometers. With this re-scaled data it was possible to evaluate how water availability and temperature affected wood density, microfibril angle (MFA) and fibre and vessel transverse dimensions in irrigated and non-irrigated trees.• Wood density, fibre radial diameter and MFA were sensitive to water availability. Wood density increased and fibre radial diameter decreased in response to reduced water availability. When high water availability was maintained, wood density was negatively correlated with temperature. Together, temperature and soil matric potential explained about 60% of temporal variation in wood density variation. In contrast MFA was not related to temperature but decreased with increasing water stress. Slower growing trees also had lower MFA than faster growing trees. Slower growing trees had a larger number of vessels per unit area of wood than faster growing trees within this even aged stand. However, vessel radius to the 4th power was significantly higher in faster growing trees than in slower growing trees.• Overall, E. globulus wood properties were sensitive to temporal changes in environmental conditions (particularly water availability) and associated growth rates. The data provided support for the hypothesis that growth rates are hydraulically mediated. Mots-clés :développement du xylème / dendromètres / taux de croissance à haute résolution / hydraulique des plantes Résumé -Variations temporelles à haute résolution des propriétés du bois d'Eucalyptus globulus irrigués et non irrigués.• Nous avons analysé les déterminants environnementaux des variations des propriétés du bois d'Eucalyptus globulus qui est une importante essence feuillue de plantation du sud de la Tasmanie en Australie.• La variation radiale des propriétés du bois -mesurées avec l'outil Silviscan -a été convertie en variation temporelle par le biais des mesures de la croissance radiale obtenues avec des dendromètres. Avec ces données recalibrées il a été possible d'évaluer comment la disponibilité en eau et la tempé-rature ont affecté la densité du bois, l'angle des microfibrilles ainsi que les dimensions transversale des fibres et vaisseaux pour les arbres irrigués et non irrigués.• La densité du bois, le diamètre radial des fibres et l'angle des microfibrilles sont sensibles à la disponibilité en eau. En réponse à une réduction de la disponibilité en eau on observe que la densité du bois augmente et le diamètre radial des fibres diminue. Lorsqu'un niveau élevé de disponibilité en eau est maintenu alors la densité du bois apparaît négativement corrélée avec la température. La température et le potentiel matriciel du sol expliquent ensemble environ 60 % de la variation temporel...

show abstract

Section: Wood Properties In Slow and Fast Growing Treescontrasting

confidence: 56%

Variations temporelles à haute résolution des propriétés du bois d’Eucalyptus globulus irrigués et non irrigués

Drew¹,

Downes²,

O’Grady³

et al. 2009

Ann. For. Sci.

View full text Add to dashboard Cite

show abstract

“…Several studies have explored the effects of site and growth rate on wood properties in Australian plantation eucalypts (Raymond and Muneri 2001;Wimmer et al 2002Wimmer et al , 2008Downes et al 2006). For pulp production, the most important wood properties are basic density and KPY (Greaves et al 1997).…”

Section: Introductionmentioning

confidence: 98%

Wood properties ofEucalyptus globulusat three sites in Western Australia: effects of fertiliser and plantation stocking

Downes

Harwood

Washusen

et al. 2014

Australian Forestry

Self Cite

View full text Add to dashboard Cite

Wood properties of 10-year-old trees in Eucalyptus globulus plantations at three sites in Western Australia were examined. Silvicultural treatments applied at age two years were stocking (unthinned, 1250 stems ha -1 ; thinned to 600 stems ha -1 or 300 stems ha -1 ) and nitrogen fertiliser application (0 or 250 kg ha -1 elemental nitrogen) in factorial combination. The three sites differed markedly in their annual rainfall (620-1100 mm), openpan evaporation and soil water-holding capacity. Wood cores were collected at breast height from a total of 263 trees (~15 trees for each site-by-treatment combination), and radial samples prepared for analysis by SilviScan to produce radial profiles of air-dry density and microfibril angle (MFA) and modulus of elasticity (MOE), and by radial near infrared (NIR) surface scanning to produce radial profiles of NIR-predicted Kraft pulp yield (KPY) and cellulose content (CC). Sampling interval was 0.025 mm for density and 5 mm for the other properties. For wood property mean values (i.e. wood property averages of each pith-to-cambium sample), sites differed significantly only in airdry density. The Boyup Brook site, which had low annual rainfall, the lowest climate wetness index and soil water-storage capacity and the slowest diameter growth, had the highest mean wood density (648 kg m -3 ), while Scott River, with the highest rainfall, had mean density that was 10% lower. The Wellstead site (low rainfall but highest soil water-storage capacity) was intermediate for density. The only other significant differences for mean wood properties were caused by fertiliser addition, which reduced NIR-predicted KPY from 54.6% (without fertiliser) to 54.1% and predicted CC from 43.7% to 43.1%. Clear radial trends were evident for all wood properties. Density, MOE, KPY and CC all increased from pith to the cambium, while MFA declined. From the innermost (pith) 10% to the outermost (cambial) 10% of the radius, density increased on average by 21%, MOE by 103%, KPY by 9% and cellulose by 11%, while MFA declined by 47%. NIR calibrations developed using the SilviScan and NIR spectral data explained 71% of variance in MOE for an independent set of radial wood samples of E. globulus from Victoria, but less than 50% of variance for density and MFA. Implications for paper pulp and veneer manufacture are briefly considered.

show abstract

“…However, the wood and paper industries prefer black spruce to balsam fir because the former exhibits higher wood stiffness (Alteyrac et al, 2006). This parameter is directly linked to wood density, as well as microfiber angles (Cown, 2005;Downes et al, 2002;Wimmer et al, 2008). From an anatomical point of view, the major contributing factor to wood density is the proportion of latewood and, specifically, cell wall thickness (Antal and Micko, 1994;Ivkovich et al, 2002).…”

Section: Introductionmentioning

confidence: 99%

Relations entre climat et caractéristiques cellulaires dans la tige et les racines de l’épinette noire et du sapin baumier

et al. 2010

View full text Add to dashboard Cite

Abstract• The anatomical differences of mature black spruces and balsam firs were examined at stem and root level in order to characterize their wood properties at cellular level and link these differences to climate.• Anatomical variability of these species was evaluated in relation to climate data gathered from 2001 to 2004 during the cell enlargement (CE) and wall thickening and lignification (WTL) phases. Lumen area, single cell wall thickness and total tracheid radial diameter were analyzed and regrouped into earlywood and latewood.• Results from a principal component analysis (PCA) indicated that both first eigenvectors account for 82% and 90% of total variance for CE and WTL respectively. These component factors revealed that precipitation, humidity and number of days with precipitation significantly influence the lumen area (p = 0.0168) and radial cell diameter (p = 0.0222) in earlywood. Significant differences were registered between species and tree parts (stem and root) for the lumen area, radial cell diameter and cell wall thickness in both earlywood and latewood.• In our study, black spruce exhibited smaller tracheid size in both stem and roots compared to balsam fir. Furthermore, the lower amount of tracheids produced during the growing season and higher proportion of latewood ensure a higher wood density of black spruce. The influence of temperature on earlywood formation is significant, whereas no influence was observed on latewood. Mots-clés :forêt boréale / aire du lumen / diamètre radial des cellules / épaisseur de la paroi / paramètres climatiques Résumé -Relations entre climat et caractéristiques cellulaires dans la tige et les racines de l'épinette noire et du sapin baumier.• Les différences anatomiques au niveau de la tige et du système racinaire d'épinettes noires et de pins gris matures ont été examinées afin de caractériser la qualité de leur bois au niveau cellulaire et de le relier aux conditions climatiques.• Les propriétés anatomiques de ces espèces ont été évaluées en relation avec des variables climatiques compilées au cours des années 2001 à 2004 durant la phase d'élargissement des cellules (CE) et celle de l'épaississement et de la lignification des parois (WTL). L'aire du lumen, l'épaisseur des parois ainsi que le nombre total de trachéides au niveau du diamètre radial des cellules ont été analysés et regroupés selon le bois final et le bois initial.• Les résultats issus d'une analyse en composantes principales (PCA) ont révélé que les deux premiers facteurs (eigenvector) représentent 82 % et 90 % de la variance totale de CE et de WTL respectivement. Ces composantes ont indiqué que la précipitation, l'humidité et le nombre de jours avec pluie influencent significativement la formation de l'aire du lumen (p = 0.0168) et le diamètre radial des cellules (p = 0.0222) dans le bois initial. Des différences significatives ont aussi été enregistrées entre les espèces et les parties de l'arbre pour l'aire du lumen, le diamètre radial des cellules et l'épaisseur des parois dans le bois i...

show abstract

Effects of site on fibre, kraft pulp and handsheet properties of Eucalyptus globulus

Cited by 24 publications

References 19 publications

Variations temporelles à haute résolution des propriétés du bois d’Eucalyptus globulus irrigués et non irrigués

Variations temporelles à haute résolution des propriétés du bois d’Eucalyptus globulus irrigués et non irrigués

Wood properties ofEucalyptus globulusat three sites in Western Australia: effects of fertiliser and plantation stocking

Relations entre climat et caractéristiques cellulaires dans la tige et les racines de l’épinette noire et du sapin baumier

Contact Info

Product

Resources

About