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Tillväxthastighet och storleksfördelning hos hassel (Corylus avellana)
Linköping University, Department of Physics, Chemistry and Biology, Biology. Linköping University, The Institute of Technology.
2013 (Swedish)Independent thesis Basic level (degree of Bachelor), 10,5 credits / 16 HE creditsStudent thesis
Abstract [en]

To increase the knowledge about the growth of hazel (Corylus avellana)and size distribution of the shoots, circumference and stem diameter wasmeasured in a total of 54 clones in two areas in Östergötland. Further, thewidth of growth rings was determined for separate years. The diameter ofthe stems was measured both out from the centre of the stem andperpendicular to the first measure. The stems showed only a weaktendency to have an oval shape (with the longest side outwards from thecentre). The growth model did not improve when the degree of sunlightof clones was taken into the account. Therefore it is possible to use asimple and general growth model for the shoots of hazel. Such a modelwas then used to estimate the age of hazel from the diameter of the clone.

Abstract [sv]

För att öka kunskapen om hasselns (Corylus avellana) tillväxt ochstorleksfördelning av skott mättes omkrets och stamdiameter på totalt 54kloner i två olika områden i Östergötland. Vidare bestämdesårsringsbredden för enskilda år. Stammarnas diameter mättes både utåtfrån centrum och vinkelrätt mot det första måttet. Stammarna uppvisadeendast en svag tendens att vara ovala (störst mått i utåtriktningen).Tillväxtmodellen förbättrades inte av att ta hänsyn till hur ljust hasselnstod. Det är alltså möjligt att använda en enkel generell tillväxtmodell förskott av hassel. En sådan användes sedan för att beräkna åldern påhasselkloner utifrån deras diameter.

Place, publisher, year, edition, pages
2013. , 15 p.
Keyword [sv]
hassel, årsring, skott, tillväxthastighet, klon
National Category
Ecology
Identifiers
URN: urn:nbn:se:liu:diva-98309ISRN: LiTH-IFM- Ex—13/2788--SEOAI: oai:DiVA.org:liu-98309DiVA: diva2:654700
Subject / course
Biology
Supervisors
Examiners
Available from: 2013-10-21 Created: 2013-10-08 Last updated: 2013-10-21Bibliographically approved

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CiteExportLink to record
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Citation style
  • apa
  • ieee
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Output format
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