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.
1997
Forfattere
A. HovdeSammendrag
Det er ikke registrert sammendrag
Sammendrag
Det er ikke registrert sammendrag
Forfattere
A. Tietema C. Beier P. H. B. deVisser B. A. Emmett P. Gundersen O. Janne Kjønaas C. J. KoopmansSammendrag
Det er ikke registrert sammendrag
Forfattere
Albert Tietema C. Beier P.H.B. de Visser Bridget A. Emmett Per Gundersen O. Janne Kjønaas Chris J. KoopmansSammendrag
The results of two European fieldscale manipulation projects (NITREX and EXMAN) were used to evaluate the effect of ecosystem disturbance on nitrate leaching in coniferous forest ecosystems. The first principle component (PC1) of a principle component analysis explained 85% of the variation in nitrate leaching between the 12 sites. This PC1 consisted of nitrogen concentrations and fluxes in the ecosystem, and was interpreted as an indicator of N status.Nitrate leaching responded rapidly to manipulation of nitrogen deposition, especially in sites with ambient high nitrate leaching. This rapid response could be explained partly by an immediate hydrological response of increased drainage. However, results of field-scale 15N tracer experiments indicated that microbial processes in the organic layer had changed after a few years of changed N deposition. In sites with already significant nitrate leaching, irrigation caused a large increase in nitrate leaching due to enhanced mineralization. Combined fertilization and irrigation had only a limited effect on nitrate leaching in nitrogen-limited sites, whereas in nitrogen-saturated sites, nitrate leaching was significantly increased.The hypothesized nitrate pulse as a result of rewetting after drought, did not occur in any of the sites. We conclude that the effect of disturbance on nitrate leaching depends on the N status of the ecosystem: in sites that are nitrogen-saturated, nitrate leaching is very sensitive to disturbance
Forfattere
Jan Mulder Petter Nilsen Arne Olav Stuanes Magne HuseSammendrag
Det er ikke registrert sammendrag
Forfattere
O. Janne Kjønaas Arne Olav StuanesSammendrag
Det er ikke registrert sammendrag
Forfattere
M Aasmo FinneSammendrag
Det er ikke registrert sammendrag
Forfattere
Jan-Ole SkageSammendrag
Det er ikke registrert sammendrag
Forfattere
A. HovdeSammendrag
Det er ikke registrert sammendrag
Forfattere
I. MysterudSammendrag
Det er ikke registrert sammendrag