Holz als Roh- und Werkstoff

, Volume 59, Issue 1, pp 79–84

Variation of wood density and shrinkage in European aspen (Populus tremula)

  • T. Kärki
Originalarbeiten · Originals

DOI: 10.1007/s001070050479

Cite this article as:
Kärki, T. Holz als Roh- und Werkstoff (2001) 59: 79. doi:10.1007/s001070050479

Populus tremula

L.) stems. The stems were randomly selected from three pure aspen stands with similar diameters at breast height and with similar tree heights. The samples for measuring the wood density and shrinkage were taken at stump height and from the heights of 3, 6, 9, 12 and 15 meters.

The results showed that wood density of European aspen is highest in the living crown. At lower heights (up to 12 meters) wood density is also higher just beneath the bark rather than in the pith. The volume shrinkage in aspen wood is largest in the middle of the cross-section pith-surface and smallest close to the pith. Longitudinal shrinkage grew slightly upwards from a height of 3 meters, radial wood shrinkage was the smallest at stump height and at a height of 15 meters and tangential shrinkage was the smallest at a height of 15 meters and it remained quite steady within tree.

Copyright information

© Springer-Verlag Berlin Heidelberg 2001

Authors and Affiliations

  • T. Kärki
    • 1
  1. 1.Finnish Forest Research Institute, Joensuu Research Centre, P.O. Box 68, 80101 Joensuu, Finland e-mail: timo.karki@metla.fi Fax + 358-13-251 4567FI