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
Tron Eid Kåre HobbelstadSammendrag
Det er ikke registrert sammendrag
Forfattere
Birgitte HenriksenSammendrag
Tips om økologisk plantevern i hagen
Forfattere
Sanna Koutaniemi Tino Warinowski Anna Kärkönen Carl Gunnar Fossdal Lars Paulin Stephen Rudd Teemu H. TeeriSammendrag
Although a detailed description of the lignin biosynthetic pathway has been established in e.g. Arabidopsis, such an analysis has not been performed in tree species. We have used EST sequencing and quantitative real-time RT-PCR to explore lignin biosynthetic gene expression in Norway spruce (Picea abies).Altogether 7500 ESTs were sequenced from a lignin forming tissue culture and developing wood of spruce, and clustered into 3800 unigenes. According to a tentative annotation, 4% of the unigenes were potentially involved in lignin biosynthesis. For most catalytic steps, several gene family members were found, but only one unigene for each gene family contained ESTs from both the tissue culture and developing wood.Expression of the unigenes was studied in detail using quantitative real-time RT-PCR. Results highlighted the set of unigenes most likely responsible for monolignol biosynthesis in Norway spruce, also demonstrating that the same genes are expressed in all lignin-forming tissues.On the contrary, peroxidases and laccases, thought to be responsible for the oxidative step in lignin polymerisation, had distinct expression profiles in different tissues. Also a few genes induced by compression stress or Heterobasidion annosum infection were identified.
Sammendrag
Det er ikke registrert sammendrag
Forfattere
Peder GjerdrumSammendrag
Skrivet omtaler innflytelse på fiberforløpet av vridd vekst, kvister, buktende toppskudd og urundt stammetverrsnitt.
Sammendrag
Det er ikke registrert sammendrag
Forfattere
Håkan Broman Mikael Frisk Mikael Rönnqvist Mikael RönnqvistSammendrag
The storm Gudrun hit southern Sweden in January 2005 and approximately 70 million cubic meters of forest was wind felled. The existing logistic planning at forest companies in the damaged area had to be changed over night. There was a direct shortage of both harvest and transportation capacities. Key questions that arised were which terminals to use, where to harvest, where to store, which transportation modes (truck, train, ship) to use. In this paper we describe how the forest company Sveaskog made use of Operations Research (OR) as an important decision support in their supply chain planning in the aftermath of the storm.
Forfattere
Mikael Rönnqvist Håkan Broman Mikael Frisk Mikael RönnqvistSammendrag
The storm Gudrun hit southern Sweden in January 2005 and approximately 70 million cubic meters of forest was wind felled. The existing logistic planning at forest companies in the damaged area had to be changed over night. There was a direct shortage of both harvest and transportation capacities. Key questions that arised were which terminals to use, where to harvest, where to store, which transportation modes (truck, train, ship) to use. In this paper we describe how the forest company Sveaskog made use of Operations Research (OR) as an important decision support in their supply chain planning in the aftermath of the storm.
Forfattere
Solveig HaukelandSammendrag
In Scandinavia studies on entomopathogenic nematodes (epn) began in Denmark more than 70 years ago and two new species in the genus Steinernema were described (Bovien 1937). In Sweden, a few decades later, Pye and Burman (1978) studied the use of Steinernema spp. against the large pine weevil (Hylobius abietis) in forestry for the first time. Today the use of epn in Scandinavia is, like most countries, most successful and most commonly employed in protected environments such as glasshouses. Use outdoors is mostly in strawberries or in nurseries against root weevils (Otiorhynchus spp.) but in general the use outdoors is still rather limited. The potential for using epn in forestry against the large pine weevil (H. abietis) has not yet been realized. For Sweden with its large forested areas it may be difficult to use epn due to immigration of the pest from surrounding forests. The use of epn in smaller Norwegian forests may be more feasible where immigration of the pest may be less of a problem. The use of epn in a slow release system (`Nemabag") against pests, such as the pollen beetle and flea beetle (Meligethes aeneus and Phyllotreta spp.) in arable crops, has been studied in Finland. Use of epn in private gardens has not been monitored, but there appears to be great interest in using epn to control grubs such as the garden chafer (Phyllopertha horticola), which is an increasing problem in many countries. In Denmark Heterorhabditis bacteriophora has been tested, not always successfully, against P. horticola on golf courses. Another beneficial nematode, pathogenic to slugs, Phasmarhabditis hermaphrodita is also on the market in some of the countries for use against the important slug pests Deroceras reticulatum and Arion lusitanicus. The latter species is becoming increasingly important as a pest not only in private gardens but also in cultivated crops such as strawberries.
Forfattere
Solveig HaukelandSammendrag
Entomopathogenic nematodes (EPN) are used for biological control of the soil dwelling stages of the vine weevil, Otiorhynchus sulcatus, a serious pest of ornamentals and field grown strawberries. Several nematode species such as Heterorhabditis megidis, H. bacteriophora and Steinernema kraussei are commercially available in Europe for control of the vine weevil. S. kraussei is sold as a cold active strain for use outdoors at low temperatures. In southern Norway, several field trials have been conducted to examine the effect of S. kraussei on vine weevil larvae at low temperatures. The trials were assessed one month after nematode treatments and showed rather poor effect at soil temperatures below 12oC. Further work is necessary to investigate the long-term effect of the applied nematodes as well as biotic and abiotic factors that may affect nematode efficacy.