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
Sammendrag
The Norwegian Public Road Adminstration (Statens vegvesen) is planning a new major road (E6) from Ringebu south to Otta in Gudbrandsdalen. A vegetation project for knowledge development concerning restoration and reestablishment of the vegetation were established in 2009, and accomplished by Bioforsk in cooperation with Vegetation adviser Tanaquil Enzensberger. Gudbrandsdalen with the river “Lågen” is a valley in the middle of southern Norway. The area belongs to the slightly continental section of south-boreal vegetation zone (Sb-C1), a phyto-geographical region which is rare in Norway and contains unique biological diversity. As an example we have the fern Diplazium sibiricum that grows in fertile hardwood forest and is classified as vulnerable (VU) on the National red list, the ligneous plant Salix triandra (VU) that grows on the river banks and the vascular plant Stellaria palustris (EN), prefering swamps on the fluvial-areas. In addition there are many threatened vascular plants connected to the cultural landscape, huge rocks with rare lichens and ravines with unique species communities in the forests. Climate, geology and vegetation of the area are described and different methods for conservation proposed. A method for decisions about which plant or plant communities to conserve by moving or propagation is suggested. Erosion, soil management, availability of phosphorus and nitrogen in the topsoil, alien and invasive species as well as restoration of wetlands are discussed. Five different methods for establishing vegetation are proposed. 1: Conventional sowing on cultivated and other disturbed sites. The seed mixture should be of local origin, but for the time being not accessable. 2: Natural revegetation from topsoil in forest areas, with the exception of forest soils high in plant nutrition, which requires special adjustments as mixing the soil with nutrient-poor forest soil or sowing. 3: Spontaneous revegetation without topsoil on one location with calcareous and coarse mineral soil and drought-tolerant vegetation, where the risk for contamination of weeds is low. 4: Donor-receptor method (“hay method”) for conservation of threatened seminatural meadows and creation of refuges for threatened plant species. 5: Vegetation-mat method (“turf roof method”) on one location with natural pasture containing vegetation of special interest. These five methods in combination with conservation of unique plants and plant communities will minimize the environmental impact of the road construction.
Forfattere
Lars Tørres HavstadSammendrag
Det er ikke registrert sammendrag
Forfattere
Kristin DaugstadSammendrag
Det er ikke registrert sammendrag
Forfattere
Mekjell Meland Clive KaiserSammendrag
Det er ikke registrert sammendrag
Sammendrag
Det er ikke registrert sammendrag
Forfattere
Anette SundbyeSammendrag
Godkjenningsprøving, utviklingsprøving Handlingsplanforsøk Undersøkelser og tidsfrister Prioritering av middelprøvinger Middelprøvinger utført i veksthus i 2010 Middelprøvinger planlagt/utført i veksthus i 2011 Utfordringer Fremtidsutsikter
Forfattere
Anette SundbyeSammendrag
Middelprøving mot skadedyr i oljevekster, grønnsaker på friland, frukt og bær, skogplanteskole, prydplanter på friland og grønnsaker i veksthus i 2010. I tillegg er restforsøkene i 2010 oppsummert, og det gitt en oversikt over over forsøk som ikke er utført/fullført, samt problemer/utfordringer og løsninger/forbedringer.
Forfattere
Ole Tobias Rannestad May Sæthre Amon P. MaerereSammendrag
Det er ikke registrert sammendrag
Forfattere
Ole Tobias Rannestad May-Guri Saethre Amon P. MaerereSammendrag
The banana weevil, Cosmopolites sordidus Germar (Coleoptera: Curculionidae) is a major pest in banana (Musa spp.) growing areas. The weevil is known to be relatively sedentary and closely associated with its host plant, but little is known about the species" ability to migrate between banana fields and in non-host habitats. Mark-recapture experiments were conducted to assess the weevils" migration potential, possible differences between the sexes, and the relative attractiveness of pseudostem and pheromone baits. One thousand two hundred marked weevils were released in non-host habitat at five distances (5, 10, 20, 40 and 70 m) from fresh pseudostem, and from pitfall traps baited with 45 mg Sordidin. Two hundred males and 200 females were marked and released at five distances (5, 10, 20, 40 and 70 m) from pheromone traps. Distance and distance/bait interactions had a significant effect on recaptured weevils (binary logistic regression). The two baits were almost equally attractive to weevils from 0-10 m, while the pheromone was more attractive from 10-100 m. Distance, bait, and distance/bait interactions had a significant effect on the time elapsed from release to recapture (regression with life data). However, the pattern observed was not consistent. There was no significant difference between males and females with respect to distance or time elapsed from release to recapture.
Forfattere
Ove BergersenSammendrag
Det er ikke registrert sammendrag