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Articles containing the keyword 'Betula pubescens Ehrh.'
Category : Research note
article id 659,
category
Research note
(1999).
Growth and stem quality of mature birches in a combined species and progeny trial.
Silva Fennica
vol.
33
no.
3
article id 659.
https://doi.org/10.14214/sf.659
Keywords:
stem quality;
growth;
Betula pendula Roth;
Betula pubescens Ehrh.;
Betula papyrifera Marsh.;
progeny;
timber production
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Author Info
The growth and stem quality of silver birch (Betula pendula), downy birch (B. pubescens) and paper birch (B. papyrifera) were compared in a 32-year-old field trial in southern Finland. The material consisted of different unselected stand origins and progenies of phenotypically selected plus trees of silver and downy birch from southern Finland and differing stand origins of paper birch from the North-West Territories, Canada. Growth, yield and a number of stem quality traits, including taper, sweep, stem defects, heights of different crown limits and length of the veneer timber part of the stem were measured or observed. The native Finnish silver and downy birches were superior to paper birch in terms of both yield and stem quality, silver birch being the best. Progenies of silver birch plus trees were better than the stand origin, indicating that the former are able to reach high quality veneer log size in a shorter time than unselected material. The cultivation of paper birch can not be considered viable in Finland.
-
Viherä-Aarnio,
The Finnish Forest Research Institute, Vantaa Research Centre, P.O. Box 18, FIN-01301 Vantaa, Finland
E-mail:
anneli.vihera-aarnio@metla.fi
- Velling, The Finnish Forest Research Institute, Vantaa Research Centre, P.O. Box 18, FIN-01301 Vantaa, Finland E-mail: pv@nn.fi
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