EJPAU 2005. Giefing D. , Pazdrowski W. , Spława-Neyman S. , Jelonek T. , Tomczak A. WOOD RADIAL CYCLIC HETEROGENEITY OF NORWAY SPRUCE (<I>Picea abies</I> (L.) Karst.) DERIVED FROM RIPENING STANDS

Electronic Journal of Polish Agricultural Universities (EJPAU) founded by all Polish Agriculture Universities presents original papers and review articles relevant to all aspects of agricultural sciences. It is target for persons working both in science and industry,regulatory agencies or teaching in agricultural sector. Covered by IFIS Publishing (Food Science and Technology Abstracts), ELSEVIER Science - Food Science and Technology Program, CAS USA (Chemical Abstracts), CABI Publishing UK and ALPSP (Association of Learned and Professional Society Publisher - full membership). Presented in the Master List of Thomson ISI.

2005
Volume 8
Issue 4

Topic:

Forestry

ELECTRONIC
JOURNAL OF
POLISH
AGRICULTURAL
UNIVERSITIES

Giefing D. , Pazdrowski W. , Spława-Neyman S. , Jelonek T. , Tomczak A. 2005. WOOD RADIAL CYCLIC HETEROGENEITY OF NORWAY SPRUCE (Picea abies (L.) Karst.) DERIVED FROM RIPENING STANDS, EJPAU 8(4), #31.
Available Online: http://www.ejpau.media.pl/volume8/issue4/abs-31.html

WOOD RADIAL CYCLIC HETEROGENEITY OF NORWAY SPRUCE (PICEA ABIES (L.) KARST.) DERIVED FROM RIPENING STANDS

Dieter Franciszek Giefing¹, Witold Pazdrowski¹, Stanisław Spława-Neyman², Tomasz Jelonek¹, Arkadiusz Tomczak¹
¹ Department of Forest Utilization, University of Life Sciences in Poznań, Poland
² Department of Forest Utilization, August Cieszkowski Agricultural University of Poznan, Poland

ABSTRACT

The performed investigations aimed at determining the proportion of juvenile, maturing (transitory) and mature wood in the radial cross section of pine stems derived from the maturing stands of the II, III and IV age classes. The experiments comprised spruce trees from the areas of the southern distribution range of this tree species in Poland. The division into juvenile, maturing and mature wood was based on the proportion of late wood in annual rings.

Regularity was found to occur in the examined experimental material which consisted in the inversed proportionality of the width of annual rings and the proportion of late wood. In the case of older trees, the plotted curves describing the width of annual rings constituted nearly a mirror reflection of the curve characterising the proportion of late wood in the annual increments of trees for thickness. Results obtained for the radial cross sections of the youngest tree trunks (II age class) deviated quite distinctly from the above-mentioned principle.

Key words: juvenile wood, maturing wood, mature wood, wood cyclical heterogeneity.

Dieter Franciszek Giefing
Department of Forest Utilization,
University of Life Sciences in Poznań, Poland
Wojska Polskiego 71A, 60-625 Poznań, Poland
Phone: +48 61 848 77 54
email: giefing@au.poznan.pl

Witold Pazdrowski
Department of Forest Utilization,
University of Life Sciences in Poznań, Poland
Wojska Polskiego 71 A, 60-625 Poznań, Poland
Phone: (+48 61) 8487757
email: kul@au.poznan.pl

Stanisław Spława-Neyman
Department of Forest Utilization,
August Cieszkowski Agricultural University of Poznan, Poland
ul. Wojska Polskiego 71 A, 60-625 Poznan, Poland

Tomasz Jelonek
Department of Forest Utilization,
University of Life Sciences in Poznań, Poland
Wojska Polskiego 71 A, 60-625 Poznań, Poland
Phone: (+48 61) 8487754
email: tjelonek@au.poznan.pl

Arkadiusz Tomczak
Department of Forest Utilization,
University of Life Sciences in Poznań, Poland
Wojska Polskiego 71 A, 60-625 Poznań, Poland
Phone: (+48 61) 8487754
email: atomczak@au.poznan.pl

Responses to this article, comments are invited and should be submitted within three months of the publication of the article. If accepted for publication, they will be published in the chapter headed 'Discussions' and hyperlinked to the article.