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.
2019
Forfattere
Geir-Harald StrandSammendrag
Det er ikke registrert sammendrag
Forfattere
Wenche DramstadSammendrag
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Forfattere
Matthias KoeslingSammendrag
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Sammendrag
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Sammendrag
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Forfattere
Ievina SturiteSammendrag
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Forfattere
Håvard Steinshamn Jan Karstein Henriksen Finn Walland Geir Næss Eystein Ystad Anne Kjersti BakkenSammendrag
•Blandingseng med rødkløver og gras høsta to ganger i sesongen gir lavere grovfôrkostnader sammenlignet med tre slåtter per år i blandingseng eller timoteibasert eng som høstes to eller tre ganger. •Blandingsenga slått to ganger per sesong gir også lavest total fôrkostnad (grovfôr + kraftfôr) selv om treslåttsystemene reduserte behovet for kraftfôr. • Sjøl om en kan bruke mindre og billigere kraftfôr ved tre slåtter, greier en ikke å dekke inn de høyere dyrkings- og høstekostnadene. • Femårig engomløp kommer generelt bedre ut økonomisk enn treårig, selv om avlingsnivået er litt lavere. Avlingsøkninga kompenserer ikke for de økte dyrkingskostnadene. • Blandingseng med kløver, som er moderat gjødsla og høsta to ganger per år, gir lavest kostnad, totalt for grovfôr + kraftfôr, og er mest arealeffektivt med dagens kraftfôrpris
Sammendrag
Det er ikke registrert sammendrag
Sammendrag
Acetylated wood is a durable and dimensionally stable product with many potential applications in exterior timber structures. Research has shown that acetylated wood can be effectively bonded by various adhesive types. However, one of the most commonly used adhesives for timber constructions, melamine urea formaldehyde (MUF), shows poor performance in combination with acetylated wood in delamination tests based on cyclic wetting and drying. The hydrophobic acetylated wood surface leads to reduced adhesion due to poorer adhesive wetting and fewer chemical bonds between the resin and the wood polymers. The use of a resorcinol-formaldehyde (RF)-based primer on the acetylated wood surface prior to the application of MUF leads to positive gluing results with both acetylated radiata pine and beech, providing significantly improved resistance to delamination. Radial penetration of the primer and MUF in acetylated wood shows higher penetration compared with untreated wood. In addition, a phenol resorcinol-formaldehyde adhesive system showed high resistance against delamination and can be used for gluing of acetylated wood.
Sammendrag
Edible seaweed biomass is a valuable alternative feed ingredient for livestock. The composition of seaweeds is highly variable, with large differences in proteins, minerals, lipids and carbohydrates. Species, season, harvesting year, habitat, and prevailing proximate environmental conditions account for this variation. Using seaweeds as a protein source for production animals is of interest. Studies suggest that some seaweed species may have bioactive compounds with antimethanogenic properties. To investigate the effect of the red seaweed Porphyra ssp on enteric methane produced by sheep an in vivo study was carried out with 24 Norwegian White ewes. The ewes were allocated into four groups receiving a control diet or one of three supplemented diets. All groups were fed grass silage ad libitum, crushed oat and mineral pellets; the three supplemented diets included a protein source where dried and powdered Porphyra ssp. was compared with white clover silage or pelleted soybean meal. The ewes were fed their respective diets for a two-week adaptation period and a 72-h experimental period during which methane was measured individually using open-circuit respiration chambers. Weight changes and methane production (L CH4/kg DM intake) were analysed using the GLM procedure with diet as fixed effect. No differences in weight changes and methane production between diets were found. Diet did not affect weight changes and methane production but DM intake was higher (P<0.001) for diets including soybean and macroalgae than white clover. Feeding red macroalgae showed no reduction in enteric methane production compared to the control diet.