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Instability in plantations of container-grown Scots pine and consequences on stem form and wood properties

Rune, Göran (2003). Instability in plantations of container-grown Scots pine and consequences on stem form and wood properties. Diss. (sammanfattning/summary) Uppsala : Sveriges lantbruksuniv., Acta Universitatis agriculturae Sueciae. Silvestria, 1401-6230 ; 281
ISBN 91-576-6515-X
[Doctoral thesis]

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Abstract

This thesis summarizes and discusses results of four studies regarding the effects of growing Scots pine (Pinus sylvestris L.)in containers on root deformation, tree stability, basal sweep- and compression wood formation. The thesis is based on non-experimental surveys that include young (7- to 9-year-old) and older (19- to 24-year-old) Scots pine trees from naturally regenerated stands and from stands established with container-grown (Paperpot) seedlings. The thesis is also based on data obtained from 6- and 22-year-old trials with Scots pine seedlings reared from containers of different design. Results showed that root morphology, mechanical tree stability and stem straightness of container-grown Scots pine trees will improve over time and approach the state of naturally regenerated trees. However, inside the root system fibre disturbances as well as bark remains still occur. Root deformation caused by improper design of containers may lead to mechanical tree instability and leaning trees, which will cause compression wood formation. For 6-year-old Scots pine trees, the correlation between basal sweep and compression wood content was strong. No correlation between these variables was obtained for older trees that had become straighter over time. Therefore, the straightness of a stem is not per se a reliable measure of occurrence of compression wood within the stem. Because the formation of compression wood in the basal part is ongoing as long as trees are not completely straight, it is difficult to forecast the future quality of such logs. This thesis shows that container design affects root development, which can subsequently influence the formation of basal sweep. The stem form of Scots pine can be improved by the use of a container type that promotes a more natural root morphology, especially in fertile sites with dense soil types.

Authors/Creators:Rune, Göran
Title:Instability in plantations of container-grown Scots pine and consequences on stem form and wood properties
Year of publishing :September 2003
Volume:281
Number of Pages:35
Papers/manuscripts:
NumberReferences
ALLI. Lindström, A. & Rune, G. 1999. Root deformation in plantations of container-grown Scots pine trees: effects on root growth, tree stability and stem straightness. Plant and Soil 217: 29-37. II. Rune, G. 2003. Slits in container wall improves root structure and stem straightness of outplanted Scots pine seedlings. Silva Fennica 37(3): 333-342. III. Rune, G. & Warensjö, M. 2002. Basal sweep and compression wood in young Scots pine trees. Scandinavian Journal of Forest Research 17: 529-537. IV. Warensjö, M. & Rune, G. Stem straightness and compression wood in 22-year-old container-grown Scots pine trees. Submitted manuscript.
Place of Publication:Uppsala
ISBN for printed version:91-576-6515-X
ISSN:1401-6230
Language:English
Publication Type:Doctoral thesis
Full Text Status:Public
Agris subject categories.:K Forestry > K50 Processing of forest products
Subjects:Not in use, please see Agris categories
Agrovoc terms:pinus sylvestris, reforestation, root systems, container planting, pot plants, reaction wood, tree form, stems
Keywords:Pinus sylvestris L., reforestation, root system, container types, mechanical tree stability, stem form, compression wood
URN:NBN:urn:nbn:se:slu:epsilon-72
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-72
ID Code:344
Department:(S) > Institutionen för skogens produkter och marknader (t.o.m. 061231)
Deposited By: Staff Epsilon
Deposited On:10 Sep 2003 00:00
Metadata Last Modified:02 Dec 2014 10:04

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