Effect of basic density and growth ring width on the bending strength of Norway spruce wood from southern and northern Finland

Kärkkäinen, Matti; Dumell, Olle

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Silva Fennica vol. 17 no. 2 article id 5181 | 1983 | Article

Matti Kärkkäinen , Olle Dumell

Kuusipuun taivutuslujuuden riippuvuus tiheydestä ja vuosiluston leveydestä Etelä- ja Pohjois-Suomessa.

Kärkkäinen M., Dumell O. (1983). Kuusipuun taivutuslujuuden riippuvuus tiheydestä ja vuosiluston leveydestä Etelä- ja Pohjois-Suomessa. Silva Fennica vol. 17 no. 2 article id 5181. https://doi.org/10.14214/sf.a15097

English title: Effect of basic density and growth ring width on the bending strength of Norway spruce wood from southern and northern Finland

Abstract

A population consisting of 450 Norway spruce (Picea abies (L.) H. Karst.) samples was gathered from northern and southern Finnish wood. The static bending strength was affected greatly by the density of the wood. However, keeping the density constant, the bending strength was higher in northern than in southern Finnish wood. The reason was the effect of the growth ring width.

The basic density was affected by the growth rate. Keeping the growth ring width constant, the basic density was over 5 kg/m³ lower in northern than in southern Finnish wood. This result supports the earlier findings on the effect of latitude.

The PDF includes a summary in English.

Original keywords
Etelä-Suomi; Pohjois-Suomi; kuusi; alkuperä; puuaines; puuaineen tiheys; vuosiluston leveys; taivutuslujuus

English keywords
Norway spruce; Picea abies; northern Finland; basic density; progeny; Southern Finland; growth rings; bending strength

Published in 1983

Available at https://doi.org/10.14214/sf.a15097 | Download PDF

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Nikkanen T., Ruotsalainen S. (2000) Variation in flowering abundance and its impact .. Silva Fennica vol. 34 no. 3 article id 626

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Johansson T., (1999) Biomass production of Norway spruce (Picea abies.. Silva Fennica vol. 33 no. 4 article id 649

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