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.
2010
Authors
Arne HermansenAbstract
Det er ikke registrert sammendrag
Authors
Eva SkarbøvikAbstract
Foredrag på møte for FMs Miljøvern- og Landbruksdirektører. Hell i Nord-Trøndelag, 15. september 2010.
Authors
Karen Refsgaard John Marshall Bryden Kjersti NordskogAbstract
Det er ikke registrert sammendrag
Authors
Sebastian EiterAbstract
This article uses an activity-based understanding of landscape to explore values related to perceived land cover diversity. Perceptions within two user groups, members of landowner families and hiking tourists in a mountain area in western Norway, were related to a simultaneous land cover survey, and compared to experts' evaluations of land cover and to the aims of landscape protection in the area. Users perceived the area as being significantly more diverse and valuable than experts did, which stresses the importance of taking user perception into account in landscape protection and management. Some central landscape values were dependent upon land use outside the boundaries of the protected area. This illustrates that measures within structurally defined land units are not necessarily sufficient for maintenance of landscape values experienced by users. Land use in both respects, as an upholder of values and as a way of experiencing or perceiving them, should receive an increased role in the determination of management units.
Authors
Håkon SkarstadAbstract
Det er ikke registrert sammendrag
Authors
Anita SønstebyAbstract
Norske forsøk viser, at langskudsplanter af hindebær skal være lange og med mange sideskud for at give et stort udbytte. Det opnås bedst, hvis planterne produceres i plasthus og ikke på friland.
Authors
Hugh RileyAbstract
I Norge ligger i dag 45-50 % av kornarealet i stubb om våren, som et ledd i arbeidet med å redusere erosjon og avrenning fra landbruksareal. Redusert jordarbeiding (uten pløying) er også ofte lønnsomt pga. lavere maskin- og arbeidskostnader, og det gir dessuten energibesparelser. Det er av interesse å undersøke hvorvidt avlingene kan opprettholdes uten pløying over lang tid, og hva som skjer i jorda ved et slikt dyrkingssystem. I vel 30 år er disse spørsmålene blitt fokusert i fastliggende forsøk på Kise forskningsstasjon, Nes på Hedmark. Resultater fra forsøkene er blitt rapportert i mange publikasjoner, bl.a. i bøkene "Jord- og Plantekultur" for 1998, 2002 og 2005. I tillegg er en fullstendig avlingsoversikt tom. 2004 gitt i Riley (2006). I det følgende gis en oversikt over avlingene på feltene i perioden 2005-2009 sammenlignet med tidligere. Dessuten omtales også resultater fra jordundersøkelser utført de senere årene. Til tross for at Bioforsk sin avdeling på Kise nå er nedlagt, tas det sikte på å drive de fleste av forsøkene videre, bl.a. for fortsatt å kunne klarlegge eventuelle langtidsvirkninger av ulik jordarbeidingspraksis på jord og miljø.
Abstract
Currently, very little data exist on the exposure of soil biota to engineered nanoparticles (ENPs), in spite of soils being an important potential sink for ENPs. This is mainly due to difficulties in tracing ENPs in soils where natural nanoparticles are abundant. We used neutron activated ENPs as tracers and examined the exposure (uptake, excretion and internal distribution) of nanoparticles of cobalt (Co NPs 3.9 ± 0.8 nm) and silver (Ag NPs 20.2 ± 2.5 nm) in the earthworm Eisenia fetida, and compared this to soluble cobalt and silver salts. Accumulation patterns were highly different for cobalt and silver. Concentrations of cobalt in worms reached 88% and 69% of the Co ions and Co NPs concentrations in food, respectively, while corresponding values for Ag ions and Ag NPs were 2.3% and 0.4%. Both Ag NPs and Ag ions in earthworms were excreted rapidly, while only 32% of the accumulated Co ions and Co NPs were excreted within 4 months. High accumulation of cobalt was found in blood, and to a lesser extent in the digestive tract. Sequential extraction and centrifugal ultrafiltration provided useful information on metal speciation and bioavailability of Co NPs and Ag NPs.
Abstract
Most fungicide applications targeting apple scab aim to control primary infections caused by ascospores and spraying is thereby linked to ascospore availability. We investigated the effect of pre bud break climatic conditions on seasonal patterns of ascospore release. Apple leaves bearing pseudothecia of Venturia inaequalis were overwintered at orchard sites in 8 countries for up to 3 years. Leaf samples were collected 2 to 5 weeks before bud break and again at bud break, air dried, and sent via airmail to Norway. The samples were stored at -18ºC upon arrival until tested. Disks cut from each replicate leaf sample were incubated moist at 20ºC to allow ascospore maturation but prevent discharge. Matured ascospores were induced to discharge twice a week and enumerated until the supply was exhausted. The proportion of ascospores ejected was fitted against degree-day accumulation using logistic regression. The regression intercept (onset maturation), slope (maturation rate), as well as the absolute number of spores counted differed significantly (P< 0.001, P = 0.05, P< 0.001 respectively) among sites and sampling dates. There was a significant interaction between site and sampling date, indicating that climatic conditions prior to bud break differentially impacted the subsequent ascospore availability. Observed differences could perhaps be used to further refine previously described models of ascospore maturity.
Authors
Einar Timdal Harald Bratli Reidar Haugan Håkon Holien Tor TønsbergAbstract
Artikkelen har parallell engelsk og norsk tekst.