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.
2017
Forfattere
Trond MæhlumSammendrag
Det er ikke registrert sammendrag
Forfattere
Trond MæhlumSammendrag
Det er ikke registrert sammendrag
Forfattere
Trond MæhlumSammendrag
Det er ikke registrert sammendrag
Sammendrag
Regionale klimamodeller for Norge gir grunnlag for regionale oversikter over forventede endringer i temperatur, nedbør og vind. Endringer i nedbørforholdene vil kunne få stor betydning for dreneringen og de andre av landbrukets hydrotekniske systemer som lukkingsanlegg, kanaler og behovet for erosjonssikring. Dreneringssystem som er anlagt i perioden 1960–1990 er dimensjonert etter klimaforholdene som fantes da.
Forfattere
Johannes DeelstraSammendrag
In Norway, and many other countries, subsurface drainage systems are a necessity to practice agriculture. Drainage systems, through control of the groundwater level, have a direct influence on the soil moisture content. To facilitate tillage practices and harvesting depending on soil type, the soil moisture content has to be at 80 – 90% of the field capacity in the top 20 cm of the soil profile. The main objective was to get information about the half time , i.e. the time required to reduce the runoff to 50% of the runoff at the onset of a recession period. The average half time for the small field scale catchments varied from 6 – 16 hours, indicating a fast drawdown of the water Level. The analysis of subsurface drainage is carried out as part of IRIDA, an EU/JPI funded project.
Forfattere
Anne Gobin Kurt Christian Kersebaum Josef Eitzinger Miroslav Trnka Petr Hlavinka Jozef Takác Joop Kroes Domenico Ventrella Anna Dalla Marta Johannes Deelstra Branislava Lalic Pavol Nejedlik Simone Orlandini Pirjo Peltonen-Sainio Ari Rajala Triin Saue Levent Saylan Ruzica Stricevic Visnja Vucetic Christos ZoumidesSammendrag
Crop growth and yield are affected by water use during the season: the green water footprint (WF) accounts for rain water, the blue WF for irrigation and the grey WF for diluting agri-chemicals. We calibrated crop yield for FAO’s water balance model “Aquacrop” at field level. We collected weather, soil and crop inputs for 45 locations for the period 1992–2012. Calibrated model runs were conducted for wheat, barley, grain maize, oilseed rape, potato and sugar beet. The WF of cereals could be up to 20 times larger than the WF of tuber and root crops; the largest share was attributed to the green WF. The green and blue WF compared favourably with global benchmark values (R2 = 0.64–0.80; d = 0.91–0.95). The variability in the WF of arable crops across different regions in Europe is mainly due to variability in crop yield (cv = 45%) and to a lesser extent to variability in crop water use (cv = 21%). The WF variability between countries (cv = 14%) is lower than the variability between seasons (cv = 22%) and between crops (cv = 46%). Though modelled yields increased up to 50% under sprinkler irrigation, the water footprint still increased between 1% and 25%. Confronted with drainage and runoff, the grey WF tended to overestimate the contribution of nitrogen to the surface and groundwater. The results showed that the water footprint provides a measurable indicator that may support European water governance.
Forfattere
Tatsiana EspevigSammendrag
Det er ikke registrert sammendrag
Forfattere
Tatsiana EspevigSammendrag
Det er ikke registrert sammendrag
Forfattere
Tatsiana EspevigSammendrag
Det er ikke registrert sammendrag
Forfattere
Tatsiana EspevigSammendrag
Det er ikke registrert sammendrag