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.
1999
Sammendrag
Trips spres med plantemateriale over landegrensene og nye arter dukker opp også hos oss
Sammendrag
To nye vertplanterarter for poinsettiamosaikkvirus er beskrevet, Euphorbia cornastra og Euphorbia bubalina
Sammendrag
Artikkelen gir ein oversikt over biologien til mjøldoggsoppane, omtalar nye vertplanter for mjøldogg i Noreg og faren for å få inn mjøldogg som kan angripa planter som tidlegare var fri for sjukdomen. Tiltak mot mjøldogg er diskutert.
Forfattere
Arne StensvandSammendrag
Erfaring med nye preparat mot gråskimmel i jordbær er omtala
Forfattere
Arne StensvandSammendrag
Det er ikke registrert sammendrag
Sammendrag
Det er ikke registrert sammendrag
Sammendrag
The Norwegian Monitoring Programme for Forest Damage has now been running for more than 10 years. Its main objective has been to monitor forest condition in relation to air pollution. Surveys of forests are performed on plots in a nation-wide representative grid network (Level 1 in the UN/ECE ICP Forests system), in a network of local county-wise plots, and in a network of intensively monitored plots (Level 2 in the UN/ECE ICP Forests system). Vitality indicators have shown a declining trend as reported earlier, expressed as reduced crown density and more of discoloured trees, particularly in spruce forests. However, results from last year have shown a slight improvement in tree crown condition. Tree mortality in excess of normal is not recorded. Forest condition generally depends upon soil, tree age, climate, pests and diseases, and other natural impact. The observed decreased crown density since 1989 is likely caused by a harsh climate, poor soil conditions and forest diseases. Air pollution loads, add to and interact with these factors. Most likely initiating factors are needed to produce visual symptoms. Summer drought is possibly such a factor of relevance to Norway. The actual effect of the air pollution component is therefore difficult to estimate; however, its importance is not excluded. In future, possible effects of a changed global climate should also be considered. Considering these results it is reasonable to presume that most Norwegian forest ecosystems generally are still in a satisfactory condition.
Sammendrag
Det er ikke registrert sammendrag
Sammendrag
Det er ikke registrert sammendrag
Sammendrag
In five-long term field trials with reduced or no-tillage the grain yield decreased and the weed infestation increased compared to autumn or spring ploughing. Both stubble treatment with glyphosate and post-emergence weed control in the crop were necessary for sufficient weed control and to keep the yield at the same level as for the ploughed plots in these systems. Weather conditions influenced weed emergence and growth of weeds and cereals during the growing season, and thereby the yield depressing effect of the weeds.