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.
2021
Sammendrag
Formålet med denne rapporten har vært å undersøke: 1) Hva er viktig for potetdyrkere i drifta deres? 2) Hvordan tar de beslutninger om planteverntiltak? 3) Hvordan bruker og vurderer potetdyrkere VIPS? 4) Hvordan skiller de potetdyrkerne som bruker VIPS seg fra de som ikke bruker VIPS? 5) Hvordan vurderer potetdyrkere rammevilkårene for plantevern? og 6) Hva er viktig for framtida til norsk potetproduksjon?....
Forfattere
Anna Birgitte MilfordSammendrag
Det er ikke registrert sammendrag
Sammendrag
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Sammendrag
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Forfattere
Trygve S. AamlidSammendrag
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Forfattere
Ikumi Umetani Eshetu Janka Wakjera Michal Sposób Christopher Jonathan Hulatt Synne Kleiven Rune BakkeSammendrag
Bicarbonate was evaluated as an alternative carbon source for a green microalga, Tetradesmus wisconsinensis, isolated from Lake Norsjø in Norway. Photosynthesis, growth, and lipid production were studied using four inorganic carbon regimes: (1) aeration only, (2) 20 mM NaHCO3, (3) 5% (v/v) CO2 gas, and (4) combination of 20 mM NaHCO3 and 5% CO2. Variable chlorophyll a fluorescence analysis revealed that the bicarbonate treatment supported effective photosynthesis, while the CO2 treatment led to inefficient photosynthetic activity with a PSII maximum quantum yield as low as 0.31. Conversely, bicarbonate and CO2 treatments gave similar biomass and fatty acid production. The maximum growth rate, the final cell dry weight, and total fatty acids under the bicarbonate-only treatment were 0.33 (± 0.06) day−1, 673 (± 124) mg L−1 and 75 (± 5) mg g−1 dry biomass, respectively. The most abundant fatty acid components were α-linolenic acid and polyunsaturated fatty acids constituting 69% of the total fatty acids. The fatty acid profile eventuated in unsuitable biodiesel fuel properties such as high degree of unsaturation and low cetane number; however, it would be relevant for food and feed applications. We concluded that bicarbonate could give healthy growth and comparative product yields as CO2.
Forfattere
Siv Kristin Sællmann Iselin Elise Fjeld Ellen Johanne Svalheim Trygve S. Aamlid Olaug Bollestad Maren Hersleth HolsenSammendrag
Forskerne kunne tjuedoblet produksjonen av norske markblomster, men mangler fortsatt midler. I fem år har de ventet på en lovet plan mot insektdød fra regjeringen.
Sammendrag
Population fluctuations of small rodents are often synchronized over larger areas (>100 km) than what could be explained by dispersal, suggesting that the synchronizing factor is weather-related and possibly mediated through changes in food quality. Because bank vole (Myodes glareolus) populations usually peak 1 year after peaks in reproduction of the staple winter food plant bilberry (Vaccinium myrtillus), we tested for a possible link between food and spatial synchrony by comparing the synchrony in bank vole population indices and bilberry seed production indices between three study areas across about 20,000 km2 in South Norway during a four decade period (1979–2019). There were subperiods of spatial synchrony and asynchrony between the study areas in the fluctuations of bank vole numbers and bilberry seed production, with the latter part of the study period displaying more pronounced synchrony than the first and middle part. However, with a few marked exceptions, when vole fluctuations were spatially out of phase across study areas so was bilberry seed production. Thus, we conclude that bilberry seed production to a large extent explained the spatiotemporal synchronicity in bank vole population fluctuations. Although bilberry seed production seems to be a causal driver of vole fluctuations, it remains to be seen to what extent the chemical composition of bilberry plants influences vole performance. Finally, certain weather factors may still influence voles directly, or indirectly by triggering bilberry seed production.
Forfattere
Aksel GranhusSammendrag
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Forfattere
Michel VerheulSammendrag
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