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
Talgrunnlaget for dei norske normene for mengd husdyrgjødsel og mengd utskilt næringsstoff er for det meste henta frå ulike granskingar som er gjennomførde på sytti- og åttitalet. Det er liten tvil om at det har skjedd store endringar med omsyn til faktorar som fôring, produksjon/yting per dyr og dyremateriale dei siste 20-30 åra. Det er difor behov for å sjå på normtala på nytt. Denne rapporten vurderer norske tal i høve til utanlandske verdiar. Og det vert foreslått korleis ein kan kome fram til nye normtal.
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
Kristin DaugstadSammendrag
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Forfattere
Kristin DaugstadSammendrag
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Forfattere
Kristin DaugstadSammendrag
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Forfattere
Kristin DaugstadSammendrag
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Sammendrag
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Forfattere
Kristin DaugstadSammendrag
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Forfattere
Kristin DaugstadSammendrag
Det er ikke registrert sammendrag
Forfattere
Kristin DaugstadSammendrag
Det er ikke registrert sammendrag