Publikasjoner
NIBIOs ansatte publiserer flere hundre vitenskapelige artikler og forskningsrapporter hvert år. Her finner du referanser og lenker til publikasjoner og andre forsknings- og formidlingsaktiviteter. Samlingen oppdateres løpende med både nytt og historisk materiale. For mer informasjon om NIBIOs publikasjoner, besøk NIBIOs bibliotek.
2011
Forfattere
grete h m jørgensen Knut Egil BøeSammendrag
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Forfattere
Grete Helen Meisfjord Jørgensen Knut Egil BøeSammendrag
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Sammendrag
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Sammendrag
Utilizing animal slurry to produce biogas may reduce fossil fuel usage and emissions of greenhouse gases. However, there is limited information on how the recycling of digested slurry as a fertilizer impacts soil fertility in the long run. Anaerobic digestion decreases the content of organic matter in the slurry and organic farmers are concerned that this will deplete soil organic matter pools. This will be studied in the SOILEFFECTS project, initiated in 2010 at an organic research farm in Tingvoll, Norway. A local biogas plant produces anaerobically digested slurry, to be compared with non-digested slurry in perennial ley and arable crops. Effects on crop yields, and a range of soil characteristics will be measured
Forfattere
Bernt HoelSammendrag
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Forfattere
Lars Olav Brandsæter Anne Kjersti Bakken Kjell Mangerud Hugh Riley Ragnar Eltun Haldor FykseSammendrag
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Sammendrag
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Sammendrag
Development of surface moulds and staining fungi on painted spruce panels with known origin and wood properties was investigated over a period of 4 years. Materials of Norway spruce (Picea abies) were sampled from two sites with high-productive forest on lowland in South-eastern Norway and two low-productive sites at higher altitudes and somewhat farther north. Claddings were processed from inner centreboards (mainly heartwood) and outer centerboards of both butt logs and second logs. A sub-sample of radially sawn claddings was compared with corresponding tangentially sawn claddings. Heartwood proportion, density, annual ring width, knot diameters and knot area were measured. All panels were coated with the same water-borne alkyd modified acrylic paint system. Most of the tangentially sawn claddings were coated on the side facing pith, but a sub-sample was coated on the opposite side for comparison. The specimens were exposed with 45˚ angle of inclination facing south in a field trial in Oslo from 2007 to 2011, and mould growth was evaluated visually according to EN 927-3. 7.7% of the specimens were rated as 2, 71.4% were rated as 3, 19.4% were rated as 4, and 1.5% were rated as 5. Outer boards were rated significantly higher than inner boards, while differences between origins were not significant. There was a tendency of decreased rating with increasing heartwood proportion, but the relationship was not significant. Nor was there any significant effect of annual ring with, density or knot properties. Neither the difference between radially and tangentially sawn claddings, nor the difference between specimens coated on the side facing pith was significant.
Sammendrag
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Sammendrag
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