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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.

2005

Sammendrag

Enare-Pasvikregionen er et naturgeografisk og kulturhistorisk grenseland der øst møter vest. I dette vidstrakte skog- og innsjøområdet har den eurosibirske taigaen sitt vestlige endepunkt, i møte med Barentshavets karrige tundrakyst.

Sammendrag

In this study modified wood samples were tested according to the extended standardised test procedures of ENV 807 (3 types of soils). A Round Robin test was carried out at two laboratories: Swedish National Testing and Research Institute and Norwegian Forest Research Institute.The different soil types used were conifer forest soil (pH 4.6), soil from the Simlngsdalen test field (pH 5.2) and garden compost soil (pH 7.4). The wood modifications used were furfurylation (Visorwood), acetylation and heat treatment (Thermowood). Other materials tested were linseed oil impregnated pine, reference preservative (CC and CCA) treated pine and Robinia psuedoaccacia heartwood.A dynamic MOE (MOEdyn) test device based on measurement of ultrasonic pulse propagation was used for non-destructive decay strength evaluation during the incubation period. The MOE values were correlated to measured decay mass loss of the test specimens after different periods of exposure to the soils. Type of fungal attack was also evaluated using light microscopy.Results from preliminary studies indicate that ultrasound seems to be an excellent tool for evaluation of early brown rot decay. It also seems to be feasible for detecting white rot. However it does not seem to be very accurate in evaluating early stages of soft rot decay.

Sammendrag

In recent years chitosans have been investigated as a natural chemical for wood preservation against fungal decay, and chitosan in aqueous solutions has been used in impregnation studies. To evaluate the retention of chitosan after an impregnation process and to evaluate the fixation of chitosan in wood a method for determination of chitosan in wood and water samples has been developed based on acidic hydrolysis of chitosan to glucosamine followed by online derivatization by o-phthalaldehyde, chromatographic separation and fluorescent detection. For wood samples the method was linear up to 45 mg gK1 chitosan in wood and had a recovery of 86%. The yield of chitosan in water was 87% at 1% (w/v) concentration.

Sammendrag

In recent years chitosans have been investigated as a natural chemical for wood preservation against fungal decay, and chitosan in aqueous solutions has been used in impregnation studies. To evaluate the retention of chitosan after an impregnation process and to evaluate the fixation of chitosan in wood a method for determination of chitosan in wood and water samples has been developed based on acidic hydrolysis of chitosan to glucosamine followed by online derivatization by o-phthalaldehyde, chromatographic separation and fluorescent detection. For wood samples the method was linear up to 45mgg−1 chitosan in wood and had a recovery of 86%. The yield of chitosan in water was 87% at 1%(w/v) concentration.

Sammendrag

In many European countries there has been a substantial increase in the use of nitrogen fertiliser from 1950 to the 80?s. For most of the countries studied, lower prices for wheat in the late 80"s, as an indicator for agricultural plant product prices, leaded to less application of nitrogen fertiliser, presumable because the application was less profitable.

Sammendrag

Skadedyr på bartrær i grøntanlegg tilhører gruppene pattedyr, nematoder, insekter og midd. Det er de to sistnevnte gruppene som omtales her. Angrep av spinnmidd, gallmidd, bladlus, skjoldlus, biller, barveps og sommerfugler kan gi skade på trærne som medfører nedsatt prydverdi og tilvekst. De kan også være plagsomme for brukere av grøntanlegget. Sprøyting med kjemiske sprøytemidler er ofte ikke ønskelig. Det er derfor svært viktig å forebygge eventuelle angrep av skadedyr. Planting av friske træ, god anleggsjord, godt vedlikehold, samt overvåking av trærne har stor betydning for å unngå angrep. Man bør sørge for sikker identifisering av skadegjørerne før man iverksetter eventuelle tiltak.