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Värdehöjande avkap: -Öka värdet genom att kapa bort kvalitetsfel i skogen
Linnaeus University, Faculty of Technology, Department of Forestry and Wood Technology.
2019 (Swedish)Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesisAlternative title
Value adding cuts : - Value increase through quality defects cuts in forest (English)
Abstract [sv]

Derome skog råvaruförsörjer fem sågverk i en tuff bransch med hård konkurrens. För att öka konkurrenskraften skall de testa värdehöjande avkap. Värdehöjande avkap innebär att kvalitetsfel kapas bort direkt i skogen av skördarföraren. Detta skall förutom ökande konkurrenskraft leda till högre timmerandel, mindre vrakandel, mer timmer snabbare och säkrare arbetsmiljö för entreprenörer som minimerar det manuella arbetet i skogen. Syftet är att undersöka om värdehöjande avkap ger en värdeökning samt att se vilka variabler som har störst betydelse för eventuell värdeökning. Data samlades in från en fältundersökning samt skördarens HPR- filer för att sammanställas via programmet Virkesvärde. Resultatet visade att användningen av värdehöjande avkap gav en positiv värdeökning. I fältundersökningen visades en 35 % värdeökning där värdehöjande avkap användes. Och via Virkesvärde visades en 43 % värdeökning i de fall där värdehöjande avkap förekom. Slutsatsen blev att begreppet värdehöjande avkap blev en värdehöjande handling samt att två variabler hade störst betydelse på värdeökningen, diameter samt kvalitetsklassen.

Abstract [en]

Derome forest´s main task is to provide five sawmills in the Derome Group´s industries with raw material from timber. To increase timber exchange from the forest they want to test value-adding cuts direct in to the forest. Value-adding cuts means that the harvester cuts off quality defects that lowers the value of the tree. Such quality defects is rot, buttress or crook. In this case, Derome forest wants to increase timber proportion, reduce wasted log, better timber quality and less disruptions at their industries. The purpose with this study is to investigate if the concept with value-adding cuts increases the value on individual logs and further increases all harvest. To investigate the value-adding cuts a quantitative method in shape of a field investigation was used to provide different data about the tree when value-adding cuts was applied. Except for the field investigation a program developed by Skogforsk called Virkesvärde was used to analyze the whole logging operation. The study was delimit to esclusively manage tree species used in Derome Group´s sawmills, spruce (Picea abies) and pine (Pinus sylvestris).In those cases where value-adding cuts were applied during the field investigation an average value increase was made with 39 SEK/tree and 35 % on the first stock. There is obvious connections between diameter, timber class and increase of value. A new timber proportion with 42,6 m3fub or 1,4 % was created from the analysis in Virkesvärde for the whole cutting operation. The value increase of the cutting operation was 43 % on the first stock on the trees where value-adding cut was applied. Price lists for different assortments from Derome forest was used in the calculations. In the field investigation there was value increases on lumps up to 18 dm. Only when the quality defects did not disappear the cut was unsuccessful. The result of the study gave a clear answer that value-adding cuts really was a value-adding action.

Place, publisher, year, edition, pages
2019. , p. 16
Keywords [en]
value-adding, cuts, value increase
Keywords [sv]
värdehöjande, avkap, värdeökning
National Category
Forest Science
Identifiers
URN: urn:nbn:se:lnu:diva-88120OAI: oai:DiVA.org:lnu-88120DiVA, id: diva2:1343981
Subject / course
Skogs- och träteknik
Educational program
Bachelor of Science in Forest Sciences Program, 180 credits
Supervisors
Examiners
Available from: 2019-08-20 Created: 2019-08-19 Last updated: 2019-08-20Bibliographically approved

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