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Management of spontaneously regenerated mixed stands of birch and Norway spruce in Sweden

Dahlgren Lidman, Felicia and Holmström, Emma and Lundmark, Tomas and Fahlvik, Nils (2021). Management of spontaneously regenerated mixed stands of birch and Norway spruce in Sweden. Silva Fennica. 55 , 10485
[Research article]

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Abstract

Timber production and profitability were evaluated for spontaneously-regenerated mixtures on two formerly clearcut areas. The abandoned areas developed into birch-dominated (Betula pendula Roth and Betula pubescens Ehrh.) stands with successional ingrowth of Norway spruce (Picea abies (L.) H. Karst.). An experiment with randomized treatments within blocks was established, using three management strategies and one unthinned control, resulting in variation in optimal rotation age, merchantable volume and species composition. The management strategies were evaluated based on total production (volume) by using measured growth data 42 years after clearcutting and the modelled future stand development. The long-term effects of spontaneous regeneration and management strategies were evaluated based on land expectation value (LEV) and compared with a fifth management strategy using artificial regeneration and intense thinnings. 12 years after treatment, at a stand age of 42 years, the unthinned control had produced the highest total stem volume. At interest rates of 2% or higher, the unmanaged forest was an economically viable strategy, even compared to an intensive management strategy with a preferred merchant-able timber species. Interest rates clearly impacted the profitability of the different management strategies. This study shows that when spontaneous regeneration is successful and dense, the first competition release can have a high impact on the development of future crop trees and on the species mixture.

Authors/Creators:Dahlgren Lidman, Felicia and Holmström, Emma and Lundmark, Tomas and Fahlvik, Nils
Title:Management of spontaneously regenerated mixed stands of birch and Norway spruce in Sweden
Series Name/Journal:Silva Fennica
Year of publishing :2021
Volume:55
Article number:10485
Number of Pages:19
Publisher:FINNISH SOC FOREST SCIENCE-NATURAL RESOURCES INST FINLAND
ISSN:0037-5330
Language:English
Publication Type:Research article
Article category:Scientific peer reviewed
Version:Published version
Copyright:Creative Commons: Attribution-Share Alike 4.0
Full Text Status:Public
Subjects:(A) Swedish standard research categories 2011 > 4 Agricultural Sciences > 401 Agricultural, Forestry and Fisheries > Forest Science
Keywords:Betula pendula, Betula pubescens, Picea abies, land expectation value, mixed forest, natural regeneration
URN:NBN:urn:nbn:se:slu:epsilon-p-114139
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-p-114139
Additional ID:
Type of IDID
DOI10.14214/sf.10485
Web of Science (WoS)000704128500004
ID Code:25982
Faculty:S - Faculty of Forest Sciences
Department:(S) > Dept. of Forest Ecology and Management
(S) > Southern Swedish Forest Research Centre
Deposited By: SLUpub Connector
Deposited On:28 Oct 2021 14:25
Metadata Last Modified:28 Oct 2021 14:31

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