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.
2012
Sammendrag
The source of input data for soil physical properties may contribute to uncertainty in simulated catchment response. The objective of this study was to quantify the uncertainty in catchment surface runoff and erosion predicted by the physically based model LISEM, as influenced by uncertainty in soil texture and SOM content, and the pedotransfer function derived soil water retention curve, hydraulic conductivity, aggregate stability and cohesion. LISEM was first calibrated using measured data in a sub-catchment, and then run for the whole catchment for a summer storm event with basic input data from two data sources: soil series specific generic data from the national soil survey database, and measured data collected in a grid within the catchment. The measured data were assigned in two ways: mean values per map unit, or random distribution (50 realizations) per map unit. The model was run both for a low risk situation (crop covered surface) and a high risk situation (without crop cover and with reduced aggregate stability and cohesion). The main results were that 1) using non-local database data yielded much higher peak discharge and five to six times higher soil loss than using locally measured data, 2) there was little difference in simulated runoff and soil loss between the two approaches (mean value versus randomdistribution) to assign locally measured data, 3) differences between the 50 random realizationswere insignificant, for both low-risk and high-risk situations, and 4) uncertainty related to input data could result in larger differences between runswith different input data source than between runswith the same input data source but extreme differences in erosion risk. The main conclusion was that inadequate choice of input data source can significantly affect general soil loss and the effect of measures.
Sammendrag
Det er ikke registrert sammendrag
Forfattere
Maria Magdalena Estevez Roar Linjordet John MorkenSammendrag
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Forfattere
V.S. Duarte L.P.F Souza R. Costa G.M. Coura Jr A.R. Leite J.A. Freitas O.M. Santos L.C.D. Rocha Ingeborg Klingen I. Jr. DelaliberaSammendrag
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Sammendrag
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Forfattere
Eivind Uleberg Jens Rohloff Laura Jaakola Kajetan Trost Olavi Junttila Hely Häggman Inger MartinussenSammendrag
After pollination outdoors individual bilberry plants from two Northern and two Southern clones were studied for climatic effects on berry yield and quality in a controlled phytotrone experiment at 12 °C and 18 °C. At each temperature the following light treatments were tested; 1) 12 h natural light; 2) 24 h natural light and 3) 24 h natural light plus red light. The first experimental year there was no difference in yield between temperatures, however, the second experimental year the berry yields was significantly higher at 18 °C. Berry ripening was faster in the Northern than in the Southern clones at 12 °C. Northern clones also showed significantly higher contents of total anthocyanins, all measured anthocyanin derivatives, total phenolics, malic acid and sucrose. Metabolic profiling revealed higher levels of flavanols, hydroxycinnamic acids, quinic acid and carbohydrates at 12 °C.
Forfattere
Ingerd Skow Hofgaard Till Seehusen Unni Abrahamsen Jafar Razzaghian Vinh Hong Le Oleif Elen Hugh Riley Einar Strand Guro BrodalSammendrag
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Forfattere
Lars Olav BrandsæterSammendrag
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Forfattere
Anne K. Falk Øgaard Anne BøenSammendrag
Tilførsel av avløpslam til jordbruksarealer etter dagens regelverk gir store fosfortilførsler, i mange tilfeller en større mengde fosfor enn det avlingene tar ut i løpet av 10 år. Jordas totale fosforinnhold, fosforets løselighet/tilgjengelighet og jordstruktur er viktige faktorer som påvirker fosfortapet fra jordbruksarealer. Denne rapporten gir en oversikt over kunnskapsstatus og kunnskapsbehov når det gjelder effekt av tilført avløpsslam på disse faktorene og dermed på risiko for fosfortap.
Forfattere
Ingerd Skow HofgaardSammendrag
Det er ikke registrert sammendrag