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Timber quality and volume growth in naturally regenerated and planted Scots pine stands in S. W. Sweden

Agestam, Eric and Ekö, Per-Magnus and Johansson, Ulf (1998). Timber quality and volume growth in naturally regenerated and planted Scots pine stands in S. W. Sweden. Technical Report. Uppsala: (S) > Southern Swedish Forest Research Centre, Sveriges lantbruksuniversitet. Studia forestalia Suecica ; 204
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Abstract

Timber quality in Scots pine (Pinus sylvestris L.) stands in Sweden has deteriorated during the 20th century. A possible cause of this is the increasing proportion of timber that originates in planted stands. Two naturally regenerated and two planted pine stands, of the same genetic origin, were compared. The planted stands were established as spacing experiments (1.25 x 1.25-2.5 x 2.5 m) at Tönnersjöheden Experimental Forest (lat. 56"42'N, long.l3"06'E, alt. 60 m). Volume growth and timber quality, i.e. taper, crookedness, number of branches, branch thickness, branch angle, crown size, occurrence of spike knots and damage were compared. The quality of dominant and co-dominant trees was higher in the naturally regenerated stands than in the planted stands. Of the planted trees, only 25% were straight, compared with 86% of naturally regenerated trees. In the planted stands, the mean diameter of the thickest branch below 2 m was 23 mm, compared to 15 mm in the naturally regenerated stands. Timber quality and planting density were also positively correlated, quality being very poor at the widest spacings. Volume growth at initial spacings of 1.75 x 1.75 m and denser was estimated to be 5-10% higher than that in the naturally regenerated stands.

Authors/Creators:Agestam, Eric and Ekö, Per-Magnus and Johansson, Ulf
Title:Timber quality and volume growth in naturally regenerated and planted Scots pine stands in S. W. Sweden
Series/Journal:Studia forestalia Suecica (0039-3150)
Year of publishing :1998
Number:204
Number of Pages:17
Place of Publication:Uppsala
Publisher:Swedish Univ. of Agricultural Sciences
ISBN for printed version:91-576-5555-3
ISSN:0039-3150
Language:English
Publication Type:Report
Refereed:No
Full Text Status:Public
Subjects:Obsolete subject words > FORESTRY, AGRICULTURAL SCIENCES and LANDSCAPE PLANNING > Plant production > Forestry
Keywords:growth, natural regeneration, Pinus sylvestris, spacing, planting, timber quality, volume
URN:NBN:urn:nbn:se:slu:epsilon-1-162
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-1-162
ID Code:3015
Department:(S) > Southern Swedish Forest Research Centre
Deposited By: Aina Svensson
Deposited On:22 Jan 2007 00:00
Metadata Last Modified:02 Dec 2014 10:19

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