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Grotuttaget igår, idag och dess potentiella framtid: Med utgångspunkt från Energimyndighetens syntesrapport från 2012
Linnaeus University, Faculty of Health and Life Sciences, Department of Biology and Environmental Science.
2019 (Swedish)Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
Abstract [sv]

År 2012 publicerades en sammanfattande syntesrapport från Energimyndigheten (2012). Rapporten fann bevis på att grotuttaget låg på ca 14 TWh/år. Rapporten visar också att Sveriges skogar kan hantera upp till 24 TWh/ år utan att orsaka allvarliga konsekvenser på omgivningen eller nästkommande generationer av träd. Studien beräknade grotens potentiella uttag utifrån insamlade analyser av markkemi, tekniska verktyg och uppskattningar. Dagens rapporter angående ämnet estimerar potentialen till ungefär densamma med en liten höjning till ca 27-30 TWh/år. Detta har satts i relation till hur olika hyggeslagrings tekniker påverkar det möjliga uttaget av grot tillsammans med hur kemin i marken påverkar trädens tillväxt och omgivningen. Grotuttaget gick ner till ca 8-9 TWh/år från år 2012 till 2019, från 14 TWh/år. Eftersom skogsägarna i Sydsverige är privatbrukare och behöver gå runt ekonomiskt för att kunna fortsätta sina verksamheter leder detta till att grotuttaget följer kostnadseffektiviteten av grot i sverige. I framtiden uppskattas det att grotuttaget kan öka drastiskt. Beroende på hur utvecklingen sker kan det verkliga uttaget skilja stort med många påverkande faktorer som t.ex. kostnadseffektivitet och utveckling av andra energikällor.

Abstract [en]

In 2012 a synthesis report was published by ”Energimyndigheten (2012)”. The report states that forest residues used as bioenergy represents around 14 TWh/year. The report also shows that Swedish forests can manage an outtake of up to 24 TWh/year without suffering from serious consequences, -on the plantation grounds or for, the next coming generation of trees. The study calculated the potential residue of forest outtake from collected analysis of soil chemistry, technical tools and estimations. Recent reports on forest residue outlet estimates a potential of about the same as 2012 with a slight rise to approximately 27-30 TWh/year. This has been put into relation of how different logging storage techniques affect the trees growth, the plantation grounds and the surroundings. The forest residue outlet went down to between 8-9 TWh/year from 2012-2019. This is because the main part of the forests in southern Sweden belongs to private owners and who experienced a decreasing economy to sell their residue. That leads to a problem, where the actual forest residue outlet is heavily dependent on the cost efficiency of forest residues. In the future it is estimated that the forest residue outlet can increase drastically. Depending on how the development proceed, the future outlet of forest residues may differ greatly depending on the future cost efficiency and how other energy sources develop and progress.

Place, publisher, year, edition, pages
2019. , p. 30
Keywords [en]
Forest residue, forest residue outlet, potential forest residue outlet, forest, environment, soil chemistry, nitrogen, base cations, thinning, felling, regeneration process.
Keywords [sv]
Grot, Grotuttag, potentiellt grotuttag, skogen, miljö, skotning, hygge, markkemi, kväve, baskatjoner, gallring, avverkning, föryngringsprocessen
National Category
Environmental Sciences
Identifiers
URN: urn:nbn:se:lnu:diva-88624OAI: oai:DiVA.org:lnu-88624DiVA, id: diva2:1345999
External cooperation
Bengt Nilsson, (Ämnesmässig rådgivare)
Subject / course
Environmental Science
Educational program
Environmental Analysis Programme, 180 credits
Supervisors
Examiners
Available from: 2019-08-27 Created: 2019-08-26 Last updated: 2019-08-27Bibliographically approved

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CiteExportLink to record
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