Johansson, Tord
(2014).
Growth and yield in shelter stands of silver birch and Norway spruce.
Uppsala:
(NL, NJ) > Dept. of Energy and Technology, Sveriges lantbruksuniversitet.
Rapport / Institutionen för energi och teknik, SLU
; 068
[Report]
![]() |
PDF
1MB |
Abstract
The growth and production in shelter stands of Norway spruce (Picea abies (L.) Karst.) and birches (Betula pendula Roth and Betula pubescens Ehrh.) were studied at nine areas in southern and middle Sweden (Lat. 56 – 60° N.). The spruces and birches were 25 (20 – 32) years old. Before the study was established, the stands evaluated were dense with planted spruces under self-generated birches. A birch shelter with 500 stems per hectare was created. The shelter was cut after ten years. In one stand per locality, 100 birches were left at harvesting time for further growth and development of timber quality. The MAI 20 years after treatment for pure spruce stands was 4.71 and 4.38 m3 ha-1 year-1 for spruces growing in mixed stands. The MAI for shelter birches was 4.13 m3 ha-1 year-1 and then the MAI for spruces and birches in mixed stands was 8.1 m3 ha-1 year-1. When the study was established the volume and biomass weight of the harvested birches was 107 m3 ha-1 or 84 ton d.w. ha-1 when all birches was removed and 75 m3 ha-1 or 44 ton d.w. ha-1 when a shelter of 500 birches ha-1 was left. The harvested wood could be used as biofuel. Timber could be harvested in stands where 50-100 birches ha-1 in the shelter are left. Among the remaining 100 birches per hectare in shelters examined 30 years after establishment of the study the standing volume ranged between 54 and 67 m3 ha-1.
Authors/Creators: | Johansson, Tord | ||||
---|---|---|---|---|---|
Title: | Growth and yield in shelter stands of silver birch and Norway spruce | ||||
Alternative abstract: |
| ||||
Series Name/Journal: | Rapport / Institutionen för energi och teknik, SLU | ||||
Year of publishing : | 2014 | ||||
Number: | 068 | ||||
Number of Pages: | 31 | ||||
Place of Publication: | Uppsala | ||||
Publisher: | Department of Energy and Technology, Swedish University of Agricultural Sciences | ||||
ISSN: | 1654-9406 | ||||
Language: | English | ||||
Publication Type: | Report | ||||
Article category: | Other scientific | ||||
Full Text Status: | Public | ||||
Agris subject categories.: | K Forestry > K01 Forestry - General aspects K Forestry > K10 Forestry production | ||||
Subjects: | (A) Swedish standard research categories 2011 > 4 Agricultural Sciences > 401 Agricultural, Forestry and Fisheries > Forest Science | ||||
Agrovoc terms: | picea abies, stand protection, betula pendula, betula pubescens, mixed forests, growth, sweden | ||||
Keywords: | Birch, MAI, mixed stands, Norway spruce, shelter, timber | ||||
URN:NBN: | urn:nbn:se:slu:epsilon-e-2079 | ||||
Permanent URL: | http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-e-2079 | ||||
ID Code: | 11466 | ||||
Faculty: | NJ - Fakulteten för naturresurser och jordbruksvetenskap | ||||
Department: | (NL, NJ) > Dept. of Energy and Technology | ||||
Deposited By: | SLUpub Connector | ||||
Deposited On: | 01 Sep 2014 13:38 | ||||
Metadata Last Modified: | 08 Sep 2017 09:22 |
Repository Staff Only: item control page