Biomassauttag samt askåterföring vid skogsavverkning: En undersökning av intresset för ett ökat biomassauttag och askåterföring hos skogsägare i Västerbotten
Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
Whole-tree harvesting results in an increased loss of base cations and nutrients from the forest soils, as nutrients retained within the biomass are removed along with the harvest biomass. This loss of nutrients and base cations may have a negative effect on future forest production and can lead to acidification of soil and surface water. Consequently, forest owners and their interest of whole-tree harvesting and wood ash return is of crucial importance for the future status of future soil and stream waters. The purpose of this thesis was to examine if forest owners in Västerbotten, Sweden have an interest in whole-tree harvesting and wood ash return, and also if courses is an appropriate incentive to influence forest owners regarding whole-tree harvesting and wood ash return. The method used was a questioner survey directed to 242 forest owners who had participated in bioenergy courses organized by the National Board of Forestry in Skellefteå, Sweden. The response rate of the survey was 81 percent. The results suggest that 37 percent of the forest owners were positive to whole-tree harvesting and 45 percent to wood ash return, at their next harvest. In other words, the will to take out biomass appeared proportional, or even slightly less, than the will to return base cations in form of ash to the forest soil. According to the survey, the bioenergy courses had contributed to a majority of the forest owners positive answers regarding whole-tree harvesting and wood ash return at the next harvest. The main conclusions of the study are that forest owners in Västerbotten has an interest of both whole-tree harvesting and wood ash return and that courses are an appropriate incentive to influence forest owners when it comes to these subjects.
Place, publisher, year, edition, pages
2012. , 40 p.
whole-tree harvesting, nutrients, base cations, wood ash return, forest owners.
IdentifiersURN: urn:nbn:se:umu:diva-75814OAI: oai:DiVA.org:umu-75814DiVA: diva2:635512
Subject / course
Examensarbete i miljö och hälsoskydd
Bachelor of Science in Environmental Health
Tengel, Viktoria, Univ. lektor