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Gewählte Publikation:

Buksnowitz, C; Teischinger, A; Grabner, M; Muller, U; Mahn, L.
(2010): TRACHEID LENGTH IN NORWAY SPRUCE (PICEA ABIES (L.) KARST.) ANALYSIS OF THREE DATABASES REGARDING TREE AGE, CAMBIAL AGE, TREE HEIGHT, INTER-ANNUAL VARIATION, RADIAL DISTANCE TO PITH AND LOG QUALITIES
WOOD RES. 2010; 55(4): 1-13.

Abstract:
The study analyses three databases on tracheid length measurements in Norway spruce wood (Picea abies (L.) Karst.). The measurements cover a wide range of tree age from juvenile wood to very mature wood (<120 years) as well as large tree diameters (up to >60 cm). Fibre length was measured in three different tree heights separately for earlywood and the according latewood. The databases include the whole spectrum of log qualities that are classified in the Austrian grading rules (FHP 2006). Non-linear regression (NLR) models were applied to investigate the correlation between tracheid length and tree age, cambial age or radial distance from pith at different tree heights. Trend lines of the tracheid length regarding tree age, cambial age, tree height and inter-annual variation were developed achieving high correlation coefficients up to r(2) = 0.78. The applied function to describe the tracheid length trend is based on a logarithmic curve (Bailey 1920). Due to the proposed additional terms the function allows for a steeper increase of fibre length in the juvenile growth phase as well a culmination/decrease at high age. The influence of log qualities (grades) on the fibre length was illustrated. The study gives a deeper insight on tracheid cell morphology in coniferous trees and can be applied to select the most appropriate raw material for specific wood, pulp and paper products.
Autor/innen der BOKU Wien:
Buksnowitz Christoph
Grabner Michael
Müller Ulrich
Teischinger Alfred
BOKU Gendermonitor:


Find related publications in this database (Keywords)
cambial age
log quality
juvenile / mature wood
Norway spruce (Picea abies (L.) Karst.)
radial trend
tree age
tracheid length
tree height


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