Publications
NIBIOs employees contribute to several hundred scientific articles and research reports every year. You can browse or search in our collection which contains references and links to these publications as well as other research and dissemination activities. The collection is continously updated with new and historical material.
2010
Authors
Tron Eid Andreas Brunner Gunnhild Søgaard Rasmus Astrup Stein Tomter Øyvind Løken Rune EriksenAbstract
Ambitious targets for renewable energy production in Norway draw attention to biomass potent-ials. The objective of this report is to review the state of the art regarding research on estimation methods, the availability and production of tree biomass resources for energy purposes in Norway in order to indentify knowledge gaps and thus facilitate appropriate focus, development and priorities regarding research for the coming years. The review focuses on biomass from pri-mary forest production with emphasis on Norwegian conditions, but also considers international research, especially from the other Nordic countries. Three main subject areas are considered: - biomass estimation - biomass resources and availability - biomass production. The first part of this report comprises an overview of existing biomass equations and associated inventory methods applied for estimating biomass in Norway. The overview includes a description of the Norwegian National Forest Inventory data as a basis for large-scale biomass assessments. The second part of the report comprises an overview of previous Norwegian assessments of biomass as an energy supplier as well as suggestions for improvements in such assessments. Improvement possibilities regarding the impacts of environmentally oriented restrictions, appropriate models for productivity and cost calculations regarding biomass harvesting systems, and implementation of biomass-related features in existing decisions support systems to facilitate analyses, where timber production and biomass production for energy purposes are equally important, are identified. The final part of the review focuses on silvi-cultural options aiming at optimizing the value of total biomass instead of the conventional approach to silviculture where the main focus is timber values.
Authors
Mekjell Meland Eva BirkenAbstract
No abstract has been registered
Authors
C. Rahn K. Zhang R. Lillywhite R Ramos J. Doltra JF De Paz Hugh Riley M. Fint C. Nendel K. Thorup Kristensen A. Pedersen F. Piro C. Firth U. Schmutz F. Rayns K. StrohmeyerAbstract
No abstract has been registered
Authors
John Marshall BrydenAbstract
No abstract has been registered
Abstract
No abstract has been registered
Authors
Bjørn Molteberg Trygve S. Aamlid Gudni Thorvaldsson Frank Enger Jan Tangsveen Trond Olav PettersenAbstract
This report gives results from the sowing year 2007 and the two first green years 2008 and 2009 in a project evaluating turfgrass varieties for use on Scandinavian golf greens. The total project period is 2007-2010.
Abstract
No abstract has been registered
Authors
Grete StokstadAbstract
No abstract has been registered
Authors
Kjell Suadicani Bruce Edward TalbotAbstract
This study investigated the feasibility of extracting and chipping hardwood crowns for energy after motor-manual thinning in stands of common beech. Large crowns were extracted and chipped from stands where only sawlogs had been produced, while small crowns were extracted and chipped from stands where sawlogs and firewood had been harvested. The fuel chip yield was 15 m3 solid ha-1 when extracting and chipping large crowns, while it was 8 m3 solid ha-1 when extracting and chipping small crowns. The productivity for extracting and chipping large crowns was 8.5 m3 solid per workplace hour, and for small crowns was 5.9 m3 solid per workplace hour. Extracting and chipping large crowns gave a net income of €167 ha-1 (€11 m-3 solid), while extracting and chipping small crowns gave a lower net income of €23 ha-1 (€3 m-3 solid). The study showed that extracting and chipping large hardwood crowns is feasible and can make a substantial contribution to woody biomass feedstocks. Four product-mix alternatives were considered, but the marginal differences in outcome led the authors to recommend that in addition to sawlogs only one product, firewood or chips, should be produced in each stand.
Authors
Kjell Suadicani Bruce TalbotAbstract
No abstract has been registered