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.
2007
Forfattere
Stig UlvangSammendrag
Generell presentasjon av muligheter innen lokal mat, basert på erfaringene med Matprogramme tog Nordnorsk kompetansenettverk fo småskala matproduksjon
Forfattere
Gediminas Brazaitis Kalev Jogiste Vitas Marozas Christian UhligSammendrag
Natural disturbance dynamics analysis for forest ecosystem management
Sammendrag
Det er ikke registrert sammendrag
Sammendrag
Det er ikke registrert sammendrag
Forfattere
Lillian ØygardenSammendrag
Det er ikke registrert sammendrag
Sammendrag
Podzol development was investigated in a chronosequence on sandy beach sediments, the ages of the soils ranging from 2,400 to 8,500 years. All soil properties investigated-the organic matter content of the B horizons, clay content, Fe-o, Al-o, Si-o, Fe-o/Fe-d and Fe-d/Fe-t - tend to increase with advancing podzolization, and are strongly correlated with soil age. Topsoil pH values decrease with age. The characteristic Bh and Bs horizons had developed after approximately 4,000 years.
Forfattere
Isabelle Schülli-Maurer Daniela Sauer Karl Stahr Ragnhild Sperstad Rolf SørensenSammendrag
We investigated the development of Albeluvisols and Podzols with time in southern Norway. The Vestfold region at the western shore of the Oslofjord was chosen because it is characterized by continuous glacio-isostatic uplift for the last 12,000 years. Due to the permanent elevation process, no distinct marine terraces have been built, and the age of the sediments continuously increases with distance from the modern coastline. Albeluvisol development was assessed in a soil chronosequence on loamy marine sediments with ages ranging from approximately 1,800 to 10,200 years. The most obvious change during soil development was that after 4,500 - 5,000 years light tongues intruded from the E horizon into the B horizon, and became more pronounced with time. The combined thickness of the A and E-horizons was constant at 40 ± 3 cm in 9 of the 12 profiles and did not change with age. The organic matter content of the A-horizons, the fine silt to coarse silt ratio of the Btg horizons and the Feo/Fed ratio all decreased with soil age, whereas the thickness of the organic surface horizon and B horizon, as well as the Fed/Fet ratio all increased. Podzol development was investigated in a chronosequence on sandy beach sediments, the ages of the soils ranging from 2,400 to 8,500 years. All soil properties investigated - the organic matter content of the B horizons, clay content, Feo, Alo, Sio, Feo/Fed and Fed/Fet - tend to increase with advancing podzolization, and are strongly correlated with soil age. Topsoil pH values decrease with age. The characteristic Bh and Bs horizons had developed after approximately 4,000 years.
Forfattere
Roshan M. Bajracharya Bishal K. Sitaula Subodh Sharma Alhaji S. JengSammendrag
Det er ikke registrert sammendrag
Forfattere
Oleg I. Shumilov Elena A. Kasatkina Paul E. Aspholm Natalia V. Lukina I. Yu. KirtsideliSammendrag
Records of growth rings in sub-arctic trees play an important role in reconstructing climate change in the past. Tree-ring chronologies collected from different parts of Arctic (Fennoscandia, Kola Peninsula and Northern Siberia) were investigated by spectral (MTM method) and wavelet analysis. Among them it was analyzed juniper tree ring chronology with extension more than 700 years (from about 1300 A.D. till 2004 A.D.) collected for the central part of Kola Peninsula (Keivy region: 67.77N; 36.52E). Results of spectral analysis allow us to select the main periods of solar variability (22-year, 30-33 year and 80-90-year solar cycles) in Kola and Fennoscandia tree-ring chronologies. Besides it was found that only periodicities of around 20 years are present in Siberian series. With respect to 11-year periodicity, which is the most prominent one in sunspot number spectrum (Schwabe cycle) it may be said that it hardly appeared in sub-arctic tree-ring records. It was obtained a rather good correlation between long-term climatic variation in Europe and at Kola Peninsula. The minima of solar activity during the Sporer (1416-1534 AD), Maunder (1645-1715 AD) and Dalton (1801-1816 AD) were accompanied by temperature decreases. The coldest conditions of the last 700 years in the Northern Europe were in the XVII century during the "Little Ice Age" period. It should be noted that the Kola Peninsula tree-ring chronologies analysed here did not show any extended growth at the end of the XX century. The result obtained give us information on local climate variations in the very important area influenced by Gulf Stream and Arctic ocean and located in the vicinity of the very important for whole Europe gas field at the shelf of Barents sea. The work was partially supported by the program "Biodiversity and dynamics of gene pool" of the Russian Academy and by RFBR grant N 05-04-97528.
Sammendrag
Rapporten sammenstiller resultater av grunnundersøkelse og tilstandsvurdering av separate avløpsanlegg for helårsboliger på 60 eiendommer på Solemskogen ved Maridalsvannet i Oslo kommune. Det er gjennomført registrering av grunnforhold i området, samt vurdering av eksisterende avløpsanlegg på de 60 eiendommene. I henhold til Oslo kommunes retningslinjer for utslipp av avløpsvann fra spredt bebyggelse, settes det krav til at avløpsvannet skal kildesepareres i nedbørsfelt til drikkevannskildene. Det vil si at for eiendommene på Solemskogen skal toalettavløp (svartvann) føres til tett tank, mens gråvann kan behandles lokalt. Det finnes forskjellige typer gråvannsrenseløsninger av varierende alder for boligene i området. Noen få boliger har direkte utslipp av gråvann til steinfylling eller steinsatt grøft. Enkelte eldre infiltrasjonsanlegg består av gamle betong septikkummer og spredegrøfter av varierende lengde og kvalitet. Det finnes noen eldre sandfilteranlegg med filtersand eller leca, men hoveddelen av eksisterende gråvannsrenseanlegg består av filterkumløsninger. De fleste anleggene består av slamavskiller, filterkum med sand eller leca, inspeksjonskum og utslippsgrøft i stedlige masser eller utslippsarrangement. Hovedanbefalingen ved oppgradering av eksisterende renseløsning for boligene på Solemskogen er biologiske filtre for gråvann. Dette for å kunne utnytte mest mulig av eksisterende anlegg, samt at Oslo kommune har satt som krav i sine retningslinjer at dette er den gråvannsrenseløsningen som primært skal benyttes.