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Severity index and transfer effects on survival and volume production of Pinus sylvestris in northern Sweden

Eriksson, Gösta and Andersson, Sven and Eiche, Vilhelms and Ifver, Jan and Persson, Anders (1980). Severity index and transfer effects on survival and volume production of Pinus sylvestris in northern Sweden. Uppsala: UNSPECIFIED, Sveriges lantbruksuniversitet. Studia forestalia Suecica ; 156
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Abstract

By means of results from provenance trials in northern Sweden, a map of severity index for various latitudes and altitudes was drawn up. The severity index is defined as the expected percentage plant mortality rate in the local population during the first 20 years after establishment of the plantation. By combining transfer effects based on data from all trials, a general trend of the transfer effect was calculated. The regression obtained showed that, at constant altitude, each degree of transfer southwards meant an increase in survival of 10.8 percentage units; at constant latitude, every 100 metres of downward transfer implied an increase in survival of 3.0 percentage units. By means of a graph combining severity index with transfer effects, it is shown how optimum transfer can be estimated. Optimum transfer is defined as the transfer giving maximum volume yield, which equals 70-80 per cent survival.

Authors/Creators:Eriksson, Gösta and Andersson, Sven and Eiche, Vilhelms and Ifver, Jan and Persson, Anders
Title:Severity index and transfer effects on survival and volume production of Pinus sylvestris in northern Sweden
Series/Journal:Studia forestalia Suecica (0039-3150)
Year of publishing :1980
Number:156
Number of Pages:32
Place of Publication:Uppsala
Publisher:College of Forestry, Swedish University of Agricultural Sciences
ISBN for printed version:91-38-05858-8
ISSN:0039-3150
Language:English
Publication Type:Report
Full Text Status:Public
Subjects:Obsolete subject words > FORESTRY, AGRICULTURAL SCIENCES and LANDSCAPE PLANNING > Product science
Obsolete subject words > FORESTRY, AGRICULTURAL SCIENCES and LANDSCAPE PLANNING > Plant production > Forestry
Keywords:severity index, transfer effects, volume production, Pinus sylvestris, Northern Sweden
URN:NBN:urn:nbn:se:slu:epsilon-9-41
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-9-41
ID Code:5442
Faculty:S - Faculty of Forest Sciences
Deposited By: Skogsbiblioteket Umeå
Deposited On:25 Oct 2010 00:00
Metadata Last Modified:07 Dec 2015 10:56

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