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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

In spring 2002, extensive damage was recorded in southeast Norway on nursery-grown Norway spruce seedlings that had either wintered in nursery cold storage or had been planted out in autumn 2001. The damage was characterised by a top shoot dieback. Two visually distinct types of necroses were located either on the upper or lower part of the 2001-year-shoot. Isolations from the upper stem necroses rendered Gremmeniella abietina, while Phomopsis sp. was isolated mostly from the from the lower stem necroses. RAMS (random amplified microsatellites) profiling indicated that the G. abietina strains associated with diseased nursery seedlings belonged to LTT (large-tree type) ecotype, and inoculation tests confirmed their pathogenicity on Norway spruce seedlings. Phomopsis sp. was not pathogenic in inoculation tests, this implying it may be a secondary colonizer. We describe here the Gremmeniella - associated shoot dieback symptoms on Norway spruce seedlings and conclude that the unusual disease outburst was related to the Gremmeniella epidemic caused by the LTT type on large pines in 2001. The role of Phomopsis sp. in the tissue of diseased Norway spruce seedlings is yet unclear.

Sammendrag

Aim: To purify and analyse antimicrobial substances produced by the tomato pathogen Clavibacter michiganensis ssp. michiganensis (Cmm), with potential application in control of Clavibacter michiganensis ssp. sepedonicus (Cms), the causal agent of bacterial ring rot of potato. Methods and Results: After selection of a suitable producer and indicator strain, antimicrobial compounds were isolated using chromatographic techniques. The resulting preparations were analysed with respect to heat and protease sensitivity, amino acid composition, amino acid sequence and mass. Using this procedure we discovered one post-translationally modified 2145 Da peptide bacteriocin, one 14 kDa antimicrobial protein as well as low molecular weight (

Sammendrag

Resin pockets, being an important natural characteristic for wood quality and tree physiology, were observed on the surfaces of boards sawn from four large Norway spruce (Picea abies (L.) Karst.) trees and analysed for size and distribution. Axial length varied between trees and increased from pith to surface and from butt to top; however, three quarters of the variation were random and normally distributed. Also resin pocket frequency varied between trees. Within the stem, the resin pockets remained independent and randomly distributed following the exponential distribution in all three directions: radial, angular and axial, corresponding to a constant probability during the lifespan of the tree. No association between size and frequency was identified. The initiation and the expansion of a resin pocket appear to be controlled by two different physiological processes. The findings should add to the understanding of resin pocket formation in spruce and should be applicable to wood quality

Til dokument

Sammendrag

Det foreligger fra før lite data om tiltaket tidlig lamming som et forebyggende tiltak mot rovdyrtap. Undersøkelsen bygger på to bruk i Tana i Finnmark som har prøvd denne metoden de siste fire år. Reduksjon i tap og økte inntekter ved å ha slaktemodne lam tidlig på høsten dekker merkostnadene ved økt fôrforbruk pga lengre innefôringstid etter lamming, og gir i tillegg et positivt økonomisk bidrag til merarbeid og ekstra huskostnader. Datagrunnlaget er basert i hovedsak på resultatet fra 2006, der de to forsøksbrukene er sammenlignet med et kontrollbruk i samme område.

Sammendrag

Målet med dette prosjektet er å bidra til en optimalisert markedsregulering og utnyttelse av norskprodusert korn gjennom presise, tidlige avlingsprognoser. Det skal lages prognoser for alle kornartene per 1. august ved å kombinere historiske sammenhenger mellom vær og avling med været i inneværende års vekstsesong.

Sammendrag

I artikkelen omtaler vi den amerikanske forvaltningsmodellen Recreation Opportunity Spectrum (ROS), og vi legger fram en firedelt modell for hvordan opplevelse og bruk av skog og utmark kan differensieres på areal.

Sammendrag

Foredraget ga en oversikt over 40 år i norsk landbruksforskning. Hovedvekt ble lagt på utviklinga i korndyrkinga