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.
2007
Sammendrag
Seks fôringsforsøk ble gjennomført for å undersøke ulike fôringsstrategier for melkekyr i økologisk landbruk. Ulike konserveringsmetoder for bygg, ulike utviklingstrinn av grassurfôr og ulike proteintilskudd hadde ingen effekt på melkas sensoriske kvalitet. Fiskemel ga ingen avvik fra normal melkesmak selv når det ble fôret to timer eller en halv time før kveldsmelking.
Sammendrag
Det er ikke registrert sammendrag
Sammendrag
Det er ikke registrert sammendrag
Sammendrag
Det er ikke registrert sammendrag
Forfattere
Eivind Vangdal Aksel Døving Finn MågeSammendrag
Samanhengen mellom avling, klima og fruktkvalitetsfaktorar vart undersøkt i 11 plommesortar. Registreringar frå 1985 til 2003 viste i 8 av 11 sortar ein negativ samanheng mellom avling og oppløyst turrstoff. Syreinnhaldet var ikkje påverka av avlingsnivå. Inntil 44% av variasjonen i innhaldet av oppløyst turrstoff skuldast avlingsvariasjon. Ved å inkludera klimafaktorar i regresjonsanalysene kunne ein forklara frå 60 til 94% av variasjonen i oppløyst turrstoff med variasjon i avling og gjennomsnitts månadstemperatur og månadsnedbør. Innhaldet av oppløyst turrstoff var positivt påverka av høge temperaturar i april og juni, og kjølig og fuktig ver i mai. I år med mykje nedbør i august var innhaldet av titrerbar syre i plommene høgt.
Forfattere
Eivind Vangdal Finn Måge Aksel DøvingSammendrag
Det er ikke registrert sammendrag
Forfattere
Solveig HaukelandSammendrag
The large arionid slug Arion lusitanicus is a serious pest in parts of northern Europe including many parts of Norway. In Norway it has mainly been a pest in home gardens but in recent years it has also spread to horticultural and vegetable crops such as strawberry and lettuce. The use of the nematode Phasmarhabditis hermaphrodita against A. lusitanicus is being investigated in an on-going research project that was initiated in 2005. A survey was conducted in 2004 to examine if the nematode P. hermaphrodita could be found occurring naturally in Norway. The result of the survey was positive which led to registration of the product Nemaslug in 2005. Several experiments have been carried out since 2005, to study the effect of both the commercial product Nemaslug and Norwegian isolated P. hermaphrodita on A. lusitanicus slugs. Laboratory and controlled pot experiments confirm that young stages of the slugs are susceptible to the slug parasitic nematode. Further work on the infection process of nematodes in slugs as well as the practical aspects of nematode use in gardens and the field will be addressed as a next step in these studies.
Sammendrag
Cover crops are included in cropping systems to achieve various ecological benefits. In stockless organic cereal systems, nitrogen is commonly supplied by undersowing a legume shortly after sowing of cereals. Retarded growth of annual weeds is considered as an additional benefit of using cover crops. There is, however, less knowledge on the influence of undersown cover crops on the growth of perennial weeds. This issue was addressed in a field experiment at Ås in southeast Norway. For obtaining an experimental field with uniform distribution of the perennial weed species, root fragments of Cirsium arvense and Sonchus arvensis and rhizomes of Elymus repens, were transplanted by hand in the spring of 2001. A split plot design with 3 replications was initiated in 2002 and continued until the autumn of 2006. Barley undersown with red clover versus barley alone composed the two main plot treatments, except in 2006, in which barley was grown without red clover in the whole field. This was combined with four sub-plot mechanical treatments in the autumn: 1) untreated control; 2) mowing; 3) rotary tilling and 4) shallow ploughing plus harrowing. The autumn treatments were only carried out in 2004 and 2005. Number of weeds was counted at different dates throughout the growing season, and weed biomass was assessed just before harvest. Preliminary results indicate that red clover undersown in barley, compared to barley alone, reduced the biomass of established stands of S. arvensis by 50%, 42% and 13% in 2004, 2005 and 2006 respectively. The effect on E. repens varied from +10% in 2004 to -42% in 2005 and -50% in 2006. There was no suppression on established stands of C. arvense (+10%, 0 % and +70%). Of the autumn mechanical treatments rotary tilling and shallow ploughing most effectively retarded the growth of perennial weeds, especially C. arvense and E. repens. Rotary tilling and shallow ploughing reduced mean weed biomass for 2005 and 2006 of C. arvense by 80% (rotary tilling) and 40% (shallow ploughing), and E. repens by 77% and 89%, respectively. Mowing and shallow ploughing reduced mean weed biomass for 2005 and 2006 of S. arvensis most effectively, with a reduction of 62% for both treatments. Although the results need more attention before detailed recommendations can be given, the study indicates clearly that the effect of different mechanical treatments in the autumn depend on weed species.
Forfattere
Liv Guri Velle Samson ØpstadSammendrag
Ein gjennomgang av historia til utegangarsauen. Artikkelen tek føre seg eksempel på kvalitetar sauen har, driftsforma med heilårsbeite, nisjeprodukt og utfordringar.
Sammendrag
Det er ikke registrert sammendrag