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.
2006
Forfattere
Peder GjerdrumSammendrag
Foredraget tar opp problemstillinger knyttet til skurteknologi, til sammenhengen mellom skur- kapasitet, -nøyaktighet og -utbytte.
Forfattere
Toril Drabløs EldhusetSammendrag
Det er ikke registrert sammendrag
Forfattere
Toril Drabløs EldhusetSammendrag
Det er ikke registrert sammendrag
Sammendrag
Det er ikke registrert sammendrag
Forfattere
Torstein KvammeSammendrag
Det er ikke registrert sammendrag
Sammendrag
This study evaluates the decay and termite resistance of Scots pine (Pinus sylvestris L.) treated with 4-methoxytrityl tetrafluoroborate (MTFB).Decay resistance tests of unleached samples showed that 2%, 1.5% and 1% concentrations of MTFB (15.4kg/m3, 11.1kg/m3, and 7.4kg/m3, retention levels, respectively) gave less than 2% decay of Postia placenta and concentrations of 2% and 1.5% less than 2% decay of Coniophora puteana.Wood specimens treated with 4-methoxytrityl tetrafluoroborate solutions were not protected against the brown rot fungi after a 14-day severe leaching process, suggesting excessive leaching of the chemical from wood. Treatment with 2% concentration protected against subterranean termites, Coptotermes formosanus Shiraki based on mass losses in both leached and unleached wood specimens in comparison with lower concentration levels.These results suggest that 4-methoxytrityl tetrafluoroborate might be promising to protect wood being used outdoors against termite attack. However, 4-methoxytrityl tetrafluoroborate did not protect wood against fungal decay. Field tests are needed to observe the performance of 4-methoxytrityl tetrafluoroborate treated wood in ground contact.
Sammendrag
Det er ikke registrert sammendrag
Forfattere
Peder GjerdrumSammendrag
En kortfattet beskrivelse av tre brukt i musikkinstrumenter.
Forfattere
Terje Birkeland Knut FinstadSammendrag
Vi fant liten effekt på sagtømmervolumet av å tillate kortere minstelengde på massevirke i våre simuleringer. Treforedlingsindustrien ønsker ikke kortere minstelengde av hensyn til sikkerhet, utnyttelse av kapasitet lastebærer/tømmerbil og areal industritomt. Erfaringer fra tidligere da kortere minstelengde blei brukt i visse distrikter i landet tyder på langt høgere økning i sagtømmerandelen enn det vi fant. Ulike sammenhenger gjør at den reelle effekten på sagtømmervolumet sannsynligviser høgere enn det vi fant i simuleringhene, men lågere enn tidligere erfaringer.
Sammendrag
This study is based on data from the Level I and from forest Officers plots. We combined three sets of data on growth, deposition and soil chemistry, totally 204 plots in south-eastern and mid-Norway. As response variable we used observed growth in % of estimated growth calculated from standard Norwegian growth models. In this way we filtered out the influence of site and stand properties as this were included in the model.The dependent deposition variable used was the N deposition from the national air and precipitation monitoring program. The dependent soil chemistry variables were N, C/N ratio, base saturation, pH, Al, and Ca/Al ratio. Soil chemistry variables should reflect the properties that most likely are influenced by S and N deposition, and that could influence the trees in the hypothesised ways.We used analyses of covariance as statistical method. Growth was positively correlated to nitrogen deposition and to soil nitrogen, and negatively correlated to the C/N ratio in the soil. Also, nitrogen deposition was positively correlated to soil nitrogen and negatively to soil C/N.It was concluded that N deposition probably has increased N availability and thereby growth in southernmost Norway with an order of magnitude around 25%. There were no relationships between growth and the soil acidification variables pH, base saturation, Al concentration or Ca/Al-ratio, and we concluded that no evidence for negative effects of soil acidification on forest growth was found.