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Publications

NIBIOs employees contribute to several hundred scientific articles and research reports every year. You can browse or search in our collection which contains references and links to these publications as well as other research and dissemination activities. The collection is continously updated with new and historical material.

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1993

Academic – Xiphydria prolongata (Fourcroy) (Hymenoptera, Xiphydriidae) new to the Norwegian fauna

Fred Midtgaard, Ove Sørlibråten

Fauna Norvegica, Serie B, 40 1993. p. 48

Authors

Fred Midtgaard Ove Sørlibråten

Abstract

No abstract has been registered

1992

Report – A provenance trial with Norway spruce (Picea abies (L.) Karst.) in Iceland

Thorarin Benedikz, Tore Skrøppa

Meddelelser fra Skogforsk, 39(10) 1992. 20 p.

Authors

Thorarin Benedikz Tore Skrøppa

Abstract

No abstract has been registered

Academic – After-effects of drought did not predispose young Picea abies to infection by the bark beetle-transmitted blue-stain fungus Ophiostoma polonicum

Erik Christiansen

Scandinavian Journal of Forest Research, 7 1992. 557-569

Authors

Erik Christiansen

Abstract

The defence of Norway spruce against a combined attack of the bark beetle Ips typographus and its associated blue-stain fungi is based upon a) constitutive resin stored in ducts of the bark and sapwood, and b) induced resinosis in reaction zones surrounding the point of infection. Empirically, beetle epidemics are associated with external stresses, drought being a particularly prominent factor. An attempt was made to mechanistically explain the apparent link between drought and infestations, through studying after-effects of drought on the induced defence in stressed trees. In the field, 3-5.5 m tall trees were exposed to artificial drought over three growth seasons to investigate whether this treatment would predispose them to fungal infection in a fourth season when drought was absent. Pre-dawn xylem water potentials down to -1.85 MPa and a considerable foliage depletion were recorded. In the fourth season, the trees were inoculated with Ophiostoma polonicum, a pathogenic associate of Ips typographus. No difference in susceptibility could be seen between drought stressed trees and unstressed controls. Carbohydrate concentrations of foliage and branch bark were slightly enhanced and mineral nutrient concentrations strongly reduced in stressed trees.

Lecture – Air pollution impact on forest and vegetation of eastern Finnmark, Norway

Dan Aamlid

In: Kismul, V., J. Jerre & E. Løbersli (eds.): Effects of air pollutants on terrestrial ecosystems in the border area between Russia and Norway, pp. 56-65. Proceedings from the first symposium, Svanvik, Norway 18.-20. March 1992. Norwegian State Pollution Control Authority, Oslo, 1992.

Authors

Dan Aamlid

Abstract

No abstract has been registered

Academic – Changes in soil and soil water chemistry on permanent forest monitoring plots along pollution gradients in Norway.

Anita Jensen

Abstract from Environmental Soil Science, Edmonton, Canada. Aug. 1992, 1992.

Authors

Anita Jensen

Abstract

No abstract has been registered

Academic – Chemical and mineralogical properties of Norwegian alum shale soils, with special emphasis on heavy metal content and availability

Alhaji S. Jeng, Harald Bergseth

Acta Agriculturae Scandinavica, 42 1992. p. 88-93

Authors

Alhaji S. Jeng Harald Bergseth

Abstract

No abstract has been registered

Lecture – Critical attack level in Scots pine - a comparison between induced attack by Tomicus piniperda and different inoculation doses with its fungal assiciates

B. Långstrøm, Claes Hellqvist, Halvor Solheim

In: Living with insects, p. 424. Proceedings XIX International Congress of Entomology. Beijing 1992. (Abstract), 1992.

Authors

B. Långstrøm Claes Hellqvist Halvor Solheim

Abstract

No abstract has been registered

Academic – Critical loads for forest soils in the Nordic countries

H. Sverdrup, P. Warfvinge, Tore Frogner, ...

Ambio, 21 1992. 348-355

Authors

H. Sverdrup P. Warfvinge Tore Frogner Arnt-Olav Håøya M. Johanson B. Andersen

Abstract

No abstract has been registered

Lecture – Diseases and insects in Norwegian forest nurseries

Isabella Børja, Øystein Austarå

Proceedings of the IUFRO Working Party S2.07-09, Victoria B.C., Canada, Aug. 22-30, 1990, 1992. 91-95

Authors

Isabella Børja Øystein Austarå

Abstract

No abstract has been registered

Academic – Effects of aluminium and calcium on Picea abies seedlings.

Trond Henriksen, Toril Drabløs Eldhuset, Bjørn Langerud, ...

Scandinavian Journal of Forest Research, 7 1992. p. 63-70

Authors

Trond Henriksen Toril Drabløs Eldhuset Bjørn Langerud Arne Stuanes

Abstract

No abstract has been registered

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