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.
2024
Forfattere
Anna Avetisyan Ivan Gabrielyan Tigran Ghrejyan Mark Kalashian Marine Movsesyan Mane Tadevosyan Amalya Iskandaryan Anne Muola Laura Elina Jaakola Inger MartinussenSammendrag
Det er ikke registrert sammendrag
Sammendrag
Rapporten er utarbeidet på oppdrag for Miljødirektoratet. Den gir en oversikt over kunnskapsgrunnlag for mulige tiltak for å redusere utslipp av klimagasser fra drenert organisk jordbruksjord i Norge, både ved restaurering og ved fortsatt jordbruksdrift. Vurdering av egnete arealer for tiltak, muligheter for bokføring i det nasjonale klimagassregnskapet, positive og negative effekter av tiltakene inngår også.
Sammendrag
The aim of this study was to compare various types of peat-free or peat-reduced growing media on growth and flowering of ‘Purple piruette’ petunia hybrids. In experiment 1, 30 variants of growing media, including commercial peat-based growing media, different peat-reduced and peat-free mixtures based on garden/park waste compost and wood fiber were tested. All the peat-free variants failed in producing normal, healthy plants without chlorosis. A commercial peat-reduced growing medium with peat, garden/park waste-compost and crushed rock material (0-2 mm), base fertilized with chicken manure, and similar growing media mixtures with other types of base fertilizer gave larger plants with more flowers than the peat-based reference. The highest performing mixture with the smallest amount of peat (35% wood fiber, 30% garden park/park waste-compost, 30% peat and 5% sand) gave equal results as the commercial peat-reduced growing medium. In experiment 2, further studies of the effect of peat reduction by incorporation of wood fiber and four compost types were performed. The effect of start fertilizer incorporation to the substrates was also assessed. One of the peat-free variants with compost and wood fiber gave normal plants with rich flowering but didn’t reach the performance of pure peat on plant size. The pH (H2O) of the composts seems to be a key factor for successful substrate mixtures of compost and wood fiber. The composts with highest pH gave small plants and start fertilizer had no effects on the growth. The results show that there is a potential for development of peat-free substrates based on compost and wood fiber presuming that pH (H2O) of the composts is not too high.
Forfattere
Ritter Atoundem Guimapi Berit Nordskog Anne-Grete Roer Hjelkrem Ingeborg Klingen Ghislain Tchoromi Tepa-Yotto Manuele Tamò Karl ThunesSammendrag
The fall armyworm, Spodoptera frugiperda, situation in Africa remains a priority threat despite significant efforts made since the first outbreaks in 2016 to control the pest and thereby reduce yield losses. Field surveys in Benin and Mali reported that approximately one-week post-emergence of maize plants, the presence of fall armyworm (egg/neonates) could be observed in the field. Scouting for fall armyworm eggs and neonates is, however, difficult and time consuming. In this study, we therefore hypothesized that the optimum timeframe for the fall armyworm female arriving to lay eggs in sown maize fields could be predicted. We did this by back-calculating from interval censored data of egg and neonates collected in emerging maize seedlings at young leaf developmental stage. Early time of ovipositing fall armyworm after sowing was recorded in field experiments. By using temperature-based models to predict phenological development for maize and fall armyworm, combined with analytical approaches for time-to-event data with censored status, we estimated that about 210 accumulated Degree Days (DD) is needed for early detection of neonate larvae in the field. This work is meant to provide new insights on timely pest detection and to guide for precise timing of control measures.
Forfattere
Kalkidan Mulatu Ayele An Notenbaert Shimelis Gizachew Raji Bimrew Asmare Niklas Wickander Solomon Mwendia Peter Dörsch Caroline Brophy Karl Thunes Marit JørgensenSammendrag
Det er ikke registrert sammendrag
Forfattere
Kalkidan Mulatu Ayele Shimelis Gizachew Raji Bimrew Asmare Niklas Wickander Solomon Mwendia Peter Dörsch W. A. Worku Caroline Brophy Karl Thunes Marit JørgensenSammendrag
EthiopiaGrass Fact sheet. 1 p.
Forfattere
Kalkidan Mulatu Ayele An Notenbaert Shimelis Gizachew Raji Bimrew Asmare Niklas Wickander Solomon Mwendia Peter Dörsch W. A. Worku Caroline Brophy Karl Thunes Marit JørgensenSammendrag
Det er ikke registrert sammendrag
Sammendrag
Organisk materiale i jord er den primære næringskilden til alt jordliv. Høyt innhold av organisk materiale gir høy mikrobiell aktivitet som bidrar til god jordhelse. Dette kan ha hemmende effekt på plantesjukdommer som forårsakes av smitte via jord. Innhold av organisk materiale i jord og mikrobiell aktivitet påvirkes av dyrkingssystem, jordtype, lokalitet og klima.
Sammendrag
Det er ikke registrert sammendrag
Sammendrag
Det er ikke registrert sammendrag