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Microbial decomposition of unpeeled birch and aspen pulpwood during storage

Henningsson, Björn (1967). Microbial decomposition of unpeeled birch and aspen pulpwood during storage. Technical Report. Stockholm: Predecessors to SLU > Royal School of Forestry, Sveriges lantbruksuniversitet. Studia forestalia Suecica ; 54
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Abstract

Unpeeled birch and aspen pulpwood logs two metres in length were stored in five places in Sweden in close stacks from May 1963 to Oct. 1965. The micro-flora invading the logs, changes in moisture content, decrease in dry density and the lignin and cellulose content of the wood were followed during storage. Owing to the presence of bark, seasoning of the birch wood was slow, whereas, as a result of barkshedding, the seasoning of aspen wood was faster. The wood decomposition, measured in terms of the decrease in dry density, was greatly influenced by the length of the annual microbial growing season, wood decomposition being two to four times faster in the southern than in the northern part of Sweden. Decay advanced mainly from the end surfaces of a log inwards, indicating that, from the storage point of view, long logs are to be preferred to shorter ones. The decay fungi attacking both types of wood were almost exclusively of the white rot type, resulting in a decomposition of cellulose and lignin which proceeded at the same rate as the total wood decomposition, measured as a decrease in dry density. This indicates that by knowing the decrease in dry density of birch and aspen pulpwood, one has also a crude measure of the loss of cellulose caused by the microorganisms during storage.

Authors/Creators:Henningsson, Björn
Title:Microbial decomposition of unpeeled birch and aspen pulpwood during storage
Series/Journal:Studia forestalia Suecica (0039-3150)
Year of publishing :1967
Number:54
Number of Pages:32
Place of Publication:Stockholm
Publisher:Skogshögskolan
ISSN:0039-3150
Language:English
Publication Type:Report
Full Text Status:Public
Subjects:Obsolete subject words > FORESTRY, AGRICULTURAL SCIENCES and LANDSCAPE PLANNING > Product science > Wood fibre and forest products
Obsolete subject words > FORESTRY, AGRICULTURAL SCIENCES and LANDSCAPE PLANNING > Plant production > Plant and forest protection
Keywords:microbial decomposition, birch, aspen, pulpwood, storage, micro-flora, fungi
URN:NBN:urn:nbn:se:slu:epsilon-9-144
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-9-144
ID Code:5854
Department:Predecessors to SLU > Royal School of Forestry
Deposited By: Skogsbiblioteket Umeå
Deposited On:14 Mar 2011 00:00
Metadata Last Modified:17 Dec 2015 11:40

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