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X-ray based tree ring analyses

Lindeberg, Johan (2004). X-ray based tree ring analyses. Diss. (sammanfattning/summary) Umeå : Sveriges lantbruksuniv., Acta Universitatis Agriculturae Sueciae. Silvestria, 1401-6230 ; 299
ISBN 91-576-6533-8
[Doctoral thesis]

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In this thesis, two x-ray based dendro-analyses (batch-wise microdensitometry and energy dispersive x-ray fluorescence (EDXRF)) and the conditions under which these methods could be used on the two typical boreal conifers Norway spruce (Picea abies (L.) Karst.) and Scots pine (Pinus sylvestris L.) were evaluated. For density measurements using batch scanning x-ray densitometry, sample preparation and density calibration are vital to acquire high resolution and precision in densitometric measurements. Thickness and alignment should be adapted to give optimal resolution without loss of precision. Samples should be extracted to remove resins before wood density measurements. Ca, Mn, Fe, and Sr and in most cases K and Zn could thus be measured in an efficient way using EDXRF. Significant differences in concentrations between tree rings were found for all of these elements except Sr, indicating that tree ring concentrations of these elements could be correlated to changes in the tree environment. For Mn a correlation between soil pH and Mn concentration in tree rings was found. Other correlations between tree ring element concentration and tree environmental factors were also found. For most elements in tree-rings of Scots pine and Norway spruce it seems that the concentration is due to environmental conditions during the year the tree-ring was developed and several years afterwards. It is concluded that microdensitometry and EDXRF analyses on increment cores are cost-efficient and non-destructive analyses of wood properties. Batch-wise, x-ray based dendrochemical analysis provides opportunities for more property-based use of wood raw material and for environmental monitoring.

Authors/Creators:Lindeberg, Johan
Title:X-ray based tree ring analyses
Series Name/Journal:Acta Universitatis Agriculturae Sueciae. Silvestria
Year of publishing :February 2004
Number of Pages:25
ALLI. Bergsten, U., Lindeberg, J., Rindby, A. & Evans, R. 2001. Batch measurements of wood density on intact or prepared drill cores using x-ray microdensitometry. Wood Sciences and Technology 35, 435-452. II. Lindeberg, J. Dendrochemical Analysis Based on X-ray Fluorescence. (Manuscript) III. Lindeberg, J., Enqvist, J. & Bergsten, U. EDXRF Analysis of Metal Content in Spruce Trees. (Manuscript) IV. Lindeberg, J. Variation in Trace Element Concentrations Between Tree Rings in Scots Pine. (Manuscript) V. Lindeberg, J. & Enqvist, J. Soil Chemistry and Tree Ring Element Concentrations in Scots Pine. (Manuscript)
Place of Publication:Umeå
ISBN for printed version:91-576-6533-8
Publication Type:Doctoral thesis
Full Text Status:Public
Agris subject categories.:K Forestry > K10 Forestry production
F Plant production > F62 Plant physiology - Growth and development
Subjects:Not in use, please see Agris categories
Agrovoc terms:trees, growth rings, wood, x rays, trace elements, dendrochronology
Keywords:trace element, trace metal, dendro analysis, dendroecology, annual ring, growth ring
Permanent URL:
ID Code:462
Department:(S) > Institutionen för skogsskötsel
Deposited By: Johan Lindeberg
Deposited On:06 Feb 2004 00:00
Metadata Last Modified:02 Dec 2014 10:05

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