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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.

2006

Sammendrag

På friland bruker gjerne salatkulturen kun en måned fra planting til høsting. Behovet for tilstrekkelig og jevn næringsforsyning er av største viktighet for god vekst/kvalitet. Men det viser seg at i enkelte spesialsalatkulturer er det ofte små forskjeller mellom tilstrekkelig og for sterk gjødsling, noe som kan resultere i både bladrandskader og høyt nitratinnhold i salaten. Forsøk viser ellers at en kan måle til dels ekstremt høyt innhold av mineralisert nitrogen i jorda etter høsting, spesielt der en planter på sort plast.

Sammendrag

Modern human activities, as power plant building, mineral exploitation and military exercises, increasingly damage landscapes in Northern regions. Correspondingly to the increasing extent of Northern ecosystem disturbance there is a greater than ever need for appropriate plant material and restoration methods. This paper summarizes fifteen years of plant breeding and practical restoration efforts in Northern Norway. The work started in 1992 by collecting twenty-one different plant species, including a total of sixteen graminoids, one herbal and four lignose species. The majority of selected plant species were propagated of seeds, except for Salix sp. and Poa alpine, which were propagated vegetative. Since the year 2000 seven selected populations of graminoids, including Festuca ovina, F. rubra, Poa pratensis, Deschamsia cespitosa and Alopecurus pratensis are seed produced in Alta (69° N). Seeds produced in Alta are recently used in restoration projects in Finnmark and Troms County and first results from these sites will be presented. Furthermore, seeds produced in Alta will soon be available for commercial use.

Sammendrag

In Norway exterior wood structures have traditionally nearly exclusively been made of treated and untreated Norway spruce (Picea abies (L.) Karst) and Scots pine (Pinus sylvestris L.). In recent years there has been a tendency that other tree species, like various domestic hardwoods and imported species have been used in exterior above ground applications, often unfinished. For several wood species, especially hardwoods, information regarding the durability in use class 3 is lacking. The test procedures prescribed in the European standards, both laboratory and field tests, have some weaknesses regarding to natural durability testing. Hence, some new methods for accelerated above ground testing have been put forward. The main objectives of this project are to evaluate natural durability of Norwegian wood species for above ground applications, and to study various methods for assessing decay in wood. This paper presents the material and methods used in the project, and report the results from double layer tests after one year of exposure. No decay was detected, but almost all wood species were considerably discoloured. Thuja (Norw.), Thuja (Am.), Intsia and Tectona had the least amount of discolouration. The Norwegian softwood species had generally less discolouration than the Norwegian hardwood species. CCA and Cu preservative impregnated and FA modified Pinus sylvestris sapwood had more cracks than most of the untreated wood species. Moreover, some of the Picea abies qualities and Pinus sylvestris sapwood samples had substantial amounts of cracks.