Batch measurements of wood density on intact or prepared drill cores using x-ray microdensitometry

Bergsten, Urban; Lindeberg, Johan; Rindby, A.; Evans, Robert

doi:10.1007/s002260100106

Cited by 77 publications

(55 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Extractives were not removed. The X-ray microdensitometry (ITRAX) scanning (Bergsten et al, 2001) was done using a step size of 25 μm intervals with the following settings for tube: voltage of 30 kV, current value of 25 mA and an exposure time of 20 ms (Peltola et al, 2007). The first year of the SA chronology occurs in AD 673.…”

Section: Acquiring the Mxd Datamentioning

confidence: 99%

A palaeotemperature record for the Finnish Lakeland based on microdensitometric variations in tree rings

Helama¹,

Vartiainen²,

Holopainen

et al. 2014

Geochronometria

View full text Add to dashboard Cite

X-ray based tree-ring data of maximum latewood densities (MXD) was combined for south-eastern Finland. This data originated from subfossil and modern pine (Pinus sylvestris L.) materials comprising a continuous dendroclimatic record over the past millennium. Calibrating and verifying the MXD chronologies against the instrumental temperature data showed a promising opportunity to reconstruct warm-season (May through September) temperature variability. A new palaeotemperature record correlated statistically significantly with the long instrumental temperature records in the region and adjacent areas since the 1740s. Comparisons with tree-ring based (MXD and tree-ring width) reconstructions from northern Fennoscandia and northern Finland exhibited consistent summer temperature variations through the Medieval Climate Anomaly, Little Ice Age, and the 20 th century warmth. A culmination of the LIA cooling during the early 18 th century appeared consistently with the Maunder Minimum, when the solar activity was drastically reduced. A number of coolest reconstructed events between AD 1407 and 1902 were coeval to years of crop failure and famine as documented in the agro-historical chronicles. Results indicate an encouraging possibility of warm-season temperature reconstructions using middle/south boreal tree-ring archives to detail and enhance the understanding of past interactions between humans, ecosystems and the earth.

show abstract

Section: Acquiring the Mxd Datamentioning

confidence: 99%

A palaeotemperature record for the Finnish Lakeland based on microdensitometric variations in tree rings

Helama¹,

Vartiainen²,

Holopainen

et al. 2014

Geochronometria

View full text Add to dashboard Cite

show abstract

“…Wood density was measured by X-ray diffraction using an Itrax Density Scanner (Cox Analytical Systems, http:// www.coxsys.se/itrax_density_scanner.htm). This device is described in more detail in Lindeberg (2001) and Bergsten et al (2001), and in Fries and Ericsson (2006) the procedure followed is described in detail.…”

Section: Progeny Test Plantation Data Collection and Sample Treatmentmentioning

confidence: 99%

Genetic parameters for early wood and latewood densities and development with increasing age in Scots pine

Fries

Ericsson

2009

Ann. For. Sci.

View full text Add to dashboard Cite

Abstract• Each annual ring in pines consists of earlywood and latewood with considerable difference in density and width. To get a better determination of the genetic regulation of total wood density in Scots pine (Pinus sylvestris L.), density and width of those ring sections were measured in annual ring numbers 12 to 21 of Scots pines in a full-sib progeny test. Tree height and stem diameter were also measured.• Heritabilities for the annual ring sections increased with age for earlywood density from 0.08 to approximately 0.25; latewood density showed similar reductions. Heritability over all 10 annual rings was 0.25 for earlywood density, 0.22 for latewood density, 0.29 for height and 0.10 for stem diameter. Genetic correlations between earlywood and latewood density and growth traits were negative, while they were strongly positive between densities of adjacent annual rings (0.70-1.0).• Despite the higher heritability of earlywood density, the strong positive genetic correlation between those traits indicates little benefit from focusing solely on earlywood density when selecting for wood density. Analysing earlywood and latewood separately does not benefit from including the width of the corresponding ring section as a covariate. Juvenile wood may possibly turn into mature wood 15-20 y from the pith. Mots-clés :densité du bois / croissance / héritabilité / corrélation génétique / Pinus sylvestris Résumé -Paramètres génétiques pour les densités du bois initial et du bois final et évolution avec l'âge chez le pin sylvestre.• Chaque cerne annuel chez les pins est composé de bois initial et de bois final avec une différence de densité et de largeur. Pour obtenir une meilleure détermination de la régulation génétique de la densité totale de bois chez le pin sylvestre (Pinus sylvestris L.), la densité et la largeur de ces sections de cernes annuels ont été mesurées chez 12 à 21 pins sylvestres dans un essai de descendance de plein frères. La hauteur des arbres et le diamètre des troncs ont également été mesurés.• Les héritabilités pour les sections de cernes annuels augmentent avec l'âge pour la densité du bois initial de 0,08 à environ 0,25 ; la densité du bois final a montré des réductions similaires. L'héritabilité sur l'ensemble de 10 cernes a été de 0,25 pour la densité du bois initial, de 0,22 pour la densité du bois final, de 0,29 pour la hauteur et de 0,10 pour diamètre du tronc. Les corrélations génétiques entre densité du bois initial et du bois final et caractéristiques de la croissance ont été négatives, alors qu'elles ont été fortement positives entre la densité des cernes adjacents (0,70-1,0).• Malgré la plus forte héritabilité de la densité du bois initial, la forte corrélation génétique entre ces caractéristiques montre qu'il y a peu d'intérêt à se concentrer uniquement sur la densité du bois initial lors de la sélection pour la densité du bois. Analyser bois initial et bois final séparément ne bénéficie pas de l'inclusion comme covariable de la largeur de la section du cerne correspondant. Le boi...

show abstract

“…Thereafter, these wood specimens were kept for a few weeks under fixed environmental conditions before the measurements were carried out, so that they were stabilised to have a moisture content of 12% (air dry). Subsequently, they were scanned with an ITRAX X-ray microdensitometer (Cox Analytical Systems, Göteborg, Sweden), which works with an automatic collimator alignment at a geometrical resolution of 40 measurements per mm (Bergsten et al 2001). In our work, the standard X-ray intensity (30 kV, 35 mA) for X-ray measurements was used.…”

Section: Laboratory Measurementsmentioning

confidence: 99%

“…Afterwards, the X-ray images were analysed with the Density software program (Bergsten et al 2001) and excel macros, and parameters such as ring width (RW, mm), earlywood and latewood widths (EWW and LWW, mm), mean intraring wood density (WD, g/cm 3 ), minimum and maximum wood densities (g/cm 3 ) and earlywood and latewood densities (EWD and LWD, g/cm 3 ) were determined based on intraring density profiles. In this analysis, the mean of the maximum and minimum intraring densities were used as the threshold for earlywood and latewood for each ring; the values above this threshold representing the latewood and the values below the earlywood.…”

Section: Laboratory Measurementsmentioning

confidence: 99%

Differences in growth and wood properties between narrow and normal crowned types of Norway spruce grown at narrow spacing in Southern Finland

Gerendiain¹,

Peltola²,

Pulkkinen³

et al. 2008

Silva Fenn.

View full text Add to dashboard Cite

In recent years there has been increased interest in the so called narrow crowned Norway spruce (Picea abies f. pendula), which is a rare mutant of Norway spruce (Picea abies (L.) Karsten), as a suitable wood raw material source for pulp and paper production. This is because it is less sensitive to competition than the normal crowned Norway spruce, and thus, could be more productive especially at dense spacing. In the above context, we investigated how the growth and yield (such as height, diameter, stem volume and ring width) in addition to wood density traits and fibre properties (such as wood density, fibre length and width, cell wall thickness and fibre coarseness) were affected in trees from 9 full-sib families representing narrow crowned Norway spruce grown at narrow spacing of 1 m × 1 m in Southern Finland. For comparison, we used normal crowned Norway spruce trees from 6 breeding regions.We found that, compared to growth and yield traits, wood density traits and fibre properties showed, on average, lower phenotypic variations. In addition, these variations were smaller for narrow crowned families than for normal crowned genetic entries. Narrow crowned families also showed, on average, higher growth and yield and fibre length, but lower wood density. Moreover, the phenotypic correlations between growth, yield, wood density traits and fibre properties, ranged, on average, from moderate (narrow crowned) to high (normal crowned). As a whole, the growth and wood properties of narrow crowned families were found to be less sensitive to tree competition than the normal crowned genetic entries used as a comparison.

show abstract

Batch measurements of wood density on intact or prepared drill cores using x-ray microdensitometry

Cited by 77 publications

References 0 publications

A palaeotemperature record for the Finnish Lakeland based on microdensitometric variations in tree rings

A palaeotemperature record for the Finnish Lakeland based on microdensitometric variations in tree rings

Genetic parameters for early wood and latewood densities and development with increasing age in Scots pine

Differences in growth and wood properties between narrow and normal crowned types of Norway spruce grown at narrow spacing in Southern Finland

Contact Info

Product

Resources

About