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.
2003
Forfattere
B. Michalzik Edward Tipping Jan Mulder J.F. Gallardo Lancho Egbert Matzner C.L. Bryant Nicholas Clarke S. Lofts J.F. Vicente EstebanSammendrag
DyDOC describes soil carbon dynamics, with a focus on dissolved organic carbon (DOC). The model treats the soil as a three-horizon profile, and simulates metabolic carbon transformations, sorption reactions and water transport. Humic substances are partitioned into three fractions, one of which is immobile, while the other two (hydrophilic and hydrophobic) can pass into solution as DOC. DyDOC requires site-specific soil characteristics, and is driven by inputs of litter and water, and air and soil temperatures. The model operates on hourly and daily time steps, and can simulate carbon cycling over both long (hundreds-tothousands of years) and short (daily) time scales. An important feature of DyDOC is the tracking of 14C, from its entry in litter to its loss as D014C in drainage water, enabling information about C dynamics to be obtained from both long-term radioactive decay, and the characteristic 14C pulse caused by thermonuclear weapon testing during the 1960s ("bomb carbon"). Parameterisationis performed by assuming a current steady state. Values of a range of variables, including C pools, annual DOC fluxes, and 14C signals, are combined into objective functions for least-squares minimisation. DyDOC has been applied successfully to spruce forest sites at Birkenes (Norway) and Waldstein ( Germany), and most of the parameters have similar values at the two sites. The results indicate that the supply of DOC from the surface soil horizon to percolating water depends upon the continual metabolic production of easily leached humic material. In contrast, concentrations and fluxes of DOC in the deeper soil horizons are controlled by sorption processes, involving comparatively large pools of leachable organic matter. Times to reach steady stateare calculated to be several hundred years in the organic layer, and hundreds-to-thousands of years in the deeper mineral layers. It is estimated that DOC supplies 89 % of the mineral soil carbon at Birkenes, and 73 % at Waldstein. The model, parameterised with "steady state" data, simulates short-term variations in DOC concentrations and fluxes, and in DO 14C, which are in approximate agreement with observations
Sammendrag
Summary (English) Pharmaceuticals such as ibuprofen, carbamacepin and naproxen and the endocrine disrupters bisphenol A and nonylphenol are found in leachates from Norwegian municipal landfills. Ibuprofen and the musk compounds tonalid and galaxolide were found in all samples, but the concentration in the old, inactive part of the landfill was particularly high. The endocrine distruptors bisphenol A and nonylphenol were also detected in all samples, and the concentrations in two water samples taken downstream the landfill, were in the same range as found in the old part. The PAHs found in the leachates were methyl substituted naphtahalen, biphenyl, acenapthylene, acenapthene, fluorene and phenanthrene. All samples were filtrated (< 0,5 ?m) before analysis. Filtrates from two wells were analyzed to measure transportable organic pollutants. Most of the PAH compounds were detected both in filtrate of water sample from the new, active part of the landfill and filtrate of influent water to the treatment plant which is located 200 m downstream the landfill. This was also the case for the polycyclic musk compounds and bisphenol A. Nonylphenol was detected only in the filtrate from samples in the new landfill.
Forfattere
Steen Koekebakker Gudbrand LienSammendrag
Det er ikke registrert sammendrag
Forfattere
Kåre Rapp Jarle Halvard Nilsen Inger Martinussen Hermod Nilsen leidulf Lund Elfrid MarjalaSammendrag
Planteforsk Holt og Biologisk klimalaboratorium har i flere år hatt forsøk med molte under kontrollerte klimaforhold i veksthus. Det er gjort forsøk med ulike temperaturer, lysforhold, torvtyper, N - gjødslingskonsentrasjoner og jordfuktighet. Planen var å finne mest mulig optimale vekstbetingelser for å utnytte hele året i forbindelse med FoU i molte.
Forfattere
Inger MartinussenSammendrag
Molte er en staude, med lange jordstengler under bakken. Hver sommer vokser jordstenglene. Knopper dannes langs- og ved enden av jordstenglene. Inne i hver knopp ligger grunnlaget til ett nytt skudd. Artikkelen beskriver forskning på kommersialisering av moltedyrking.
Forfattere
Halvor SolheimSammendrag
Det er ikke registrert sammendrag
Forfattere
Anna Martha Elgersma Arnold Arnoldussen Shivcharn S. DhillionSammendrag
Det er ikke registrert sammendrag
Forfattere
Heleen A. de Wit Lars R. Hole Øyvind Kaste Jan Mulder Arne O. Stuanes Richard WrightSammendrag
Det er ikke registrert sammendrag
Forfattere
Christel ElvestadSammendrag
Det er ikke registrert sammendrag
Forfattere
Unni Støbet Lande John D. C. Linnell Ivar Herfindal Valeria Salvatori Henrik Brøseth Reidar Andersen John Odden Henrik Andrén Jens Karlsson Tomas Willebrand Jens Persson Arild Landa Roel May Bjørn Dahle Jon SwensonSammendrag
Det er ikke registrert sammendrag