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Fahlgren, Steve and Jansson, Tomas, 2010. Skötselns och ståndortens betydelse för kärnvedsbildningen i tall. First cycle, G2E. Umeå: SLU, Dept. of Forest Ecology and Management

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Abstract

Heartwood has always been a desirable part of the tree, due to it’s superior decay qualities com-pared to the sapwood. How the formation of heartwood works has been known for a long time, but which factors that initiates and stimulates the production are poorly understood. This case study presents the results of a study in which silvicultural treatments and site properties had a key position as factors to the formation of heartwood. According to the hypothesis the amount of sapwood is directly controlled by the size of the crown. The amounts of heartwood in four Scots pine stands, including a dense low quality site, a low density high quality site, and two in be-tween, was examined by extraction of core samples. According to the hypothesis dense stands at low quality sites would develop small crowns with a little need of sapwood, and therefore a larger need of heartwood.
The results basically showed that dense stands on poor sites had a bigger proportion of heartwood than low density stands on high quality sites, but the widths of the growth rings seems to be an important factor as well. However, the variation in, and especially between, the stands are large, and therefore it is difficult to draw any conclusion. The results are, nevertheless, discussed against existing theories and other field trials that had similar results.

Main title:Skötselns och ståndortens betydelse för kärnvedsbildningen i tall
Authors:Fahlgren, Steve and Jansson, Tomas
Supervisor:Mörling, Tommy and Ulvcrona, Thomas
Examiner:Alanärä, Anders
Series:UNSPECIFIED
Volume/Sequential designation:UNSPECIFIED
Year of Publication:2010
Level and depth descriptor:First cycle, G2E
Student's programme affiliation:SY001 Forest Science - Master's Programme 300 HEC
Department:(S) > Dept. of Forest Ecology and Management
Keywords:Kärnved, Tall, Skötsel, Ståndort, Bonitet, Splintved, Kronstorlek, Trängseleffekt
URN:NBN:urn:nbn:se:slu:epsilon-2-467
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-2-467
Subjects:Plant physiology and biochemistry
Plant physiology - Growth and development
Forestry production
Language:Swedish
Deposited On:08 Sep 2010 08:01
Metadata Last Modified:20 Apr 2012 14:15

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