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.
2006
Forfattere
Tor Lunnan Odd-Helge Nysveen Ottar MartinsenSammendrag
13 potetsortar er prøvde i tre demonstrasjonsfelt i Valdres i 2006. Nye sortar vart prøvde saman med gamle sortar som "Svart Valdres", "Mandelpotet" og "Kongo". Det vart tørråteangrep på to av felta og sterke angrep av håra engtege på eitt felt. Avlinga var i middel høgast hos den nye nummersorten "N 93-7-20". Av dei gamle sortane hadde "Kongo" størst avling. Tørråteangrepa var sterkast hos "Mandelpotet" og "Svart Valdres", men det var også litt hos "Kongo" og "Folva". Sorten "Svart Valdres" er interessant som merkevaresort, men sorten må da renskast for virus og prøvast meir.
Forfattere
Ingrid Holtsmark Dimitris Mantzilas Vincent Eijsink May Bente BrurbergSammendrag
Members of the actinomycete genus Clavibacter are known to produce antimicrobial compounds, but so far none of these compounds has been purified and characterized. We have isolated an antimicrobial peptide, michiganin A, from the tomato pathogen Clavibacter michiganensis subsp. michiganensis, using ammonium sulfate precipitation followed by cation-exchange and reversed-phase chromatography steps. Upon chemical derivatization of putative dehydrated amino acids and lanthionine bridges by alkaline ethanethiol, Edman degradation yielded sequence information that proved to be sufficient for cloning of the gene by a genome-walking strategy. The mature unmodified peptide consists of 21 amino acids, SSSGWLCTLTIECGTIICACR. All of the threonine residues undergo dehydration, and three of them interact with cysteines via thioether bonds to form methyllanthionine bridges. Michiganin A resembles actagardine, a type B lantibiotic with a known three-dimensional structure, produced by Actinoplanes liguriae, which is a filamentous actinomycete. The DNA sequence of the gene showed that the michiganin A precursor contains an unusual putative signal peptide with no similarity to well-known secretion signals and only very limited similarity to the (only two) available leader peptides of other type B lantibiotics. Michiganin A inhibits the growth of Clavibacter michiganensis subsp. sepedonicus, the causal agent of ring rot of potatoes, with MICs in the low nanomolar range. Thus, michiganin A may have some potential in biological control of potato ring rot.
Forfattere
Ragnar Eltun Thor Johannes Rogneby Hanne HombSammendrag
Forsøket viste at ettårig kløvereng er en god forgrøde for korn uavhengig av antall pussinger i engåret og pløyetidspunkt for enga. Planterester fra underjordiske plantedeler og positive effekter på jordstrukturen er trolig de viktigste årsaken til den gode ettervirkningen av kløvereng. Hvis en har bruk for graset fra første slåtten, kan dette således gjerne høstes uten at det går særlig på bekostning av ettervirkningen. For å få best mulig vekst av enga vil en anbefale 3-4 kuttinger. Pløyetidspunktet påvirket ikke kornavlinga i dette forsøket.
Forfattere
Maria HerreroSammendrag
Det er ikke registrert sammendrag
Foredrag – Pythium og Phytophtora - Hva koster disse rotsjukdommene norsk gartnernæring?
Brita Toppe
Forfattere
Brita ToppeSammendrag
Det er ikke registrert sammendrag
Forfattere
Stig UlvangSammendrag
Presentasjon av Nordnorsk kompetansenettverk for småskala mat med innlagt miniforedrag om merkevarer
Sammendrag
To realize the full potential of agricultural biotechnology, concerns about the possible impact of GM plants on ecosystem properties and functions must be addressed. If transgenic crops substantially affect soil organic matter decomposition and mineralization, this could be of serious concern to many farmers in the developing world, as well as to organic farmers in the developed world. These farmers rely on local residues, organic matter and soil organisms for soil fertility, and there is a risk that this could be reduced if crop products cause a slowing down of the natural processes of decomposition and nutrient release by inhibiting the activity of the soil biota.
Forfattere
Lars SekseSammendrag
I artikkelen vert det diskutert startegiar for kontroll med utbreiinga av pærebrann i Vest-Noreg.
Sammendrag
A method for quantitative determination of extractives from heartwood of Scots pine (Pinus sylvestris L.) using gas chromatography (GC) with flame ionization detection (FID) was developed. The limit of detection (LOD) was 0.03mg/g wood and the linear range (r=0.9994) was up to 10mg/g with accuracy within ±10% and precision of 18% relative standard deviation. The identification of the extractives was performed using gas chromatography combined with mass spectrometry (GC–MS). The yields of extraction by Soxhlet were tested for solid wood, small particles and fine powder. Small particles were chosen for further analysis. This treatment gave good yields of the most important extractives: pinosylvin, pinosylvin monomethyl ether, resin acids and free fatty acids. The method is used to demonstrate the variation of these extractives across stems and differences in north–south direction.
Forfattere
Tor Håkon SivertsenSammendrag
Norwegian Institute for Agricultural and Environmental Research" is the owner of a network of meteorological stations, established in 1987. 45 of the stations are measuring global radiation, hourly values. These time series are to be used as one of the input parameters for modelling UV-radiation. Also several other meteorological parameters of relevance for modelling UV-radiation are measured in this station network and discussed below. A discussion on quality of these data contains general considerations on the concept of quality, considerations on the methods for making measurements at the specific series from a few sites as well as specific quality considerations on several other available time series of meteorological parameters, like the albedo, precipitation, relative humidity of the air, temperature of the air etc. from the sites. Elements describing the sites are mentioned, like information on the horizon, the geographical coordinates etc. The availability of independent time series of measurements of ozone, cloudiness, precipitation, content of aerosol and vertical distributions of humidity to be used in models are also discussed. Modelling UV-radiation at the ground is defined as a complex problem of data integration using data from different sources. The main part of this paper contains discussion complex data integration.