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.
2005
Sammendrag
Det er ikke registrert sammendrag
Forfattere
Arne Sæbø Åsmund Asdal Inger Sundheim Fløistad Hans Martin Hanslin Trond K. Haraldsen Jan Netland Helge Sjursen Per Anker PedersenSammendrag
Presentasjon av hovedresultatene fra prosjektet "Slam og kompost til grøntanlegg". Prosjektet pågikk i perioden 2002-2004.
Forfattere
Arne Sæbø Åsmund Asdal Inger Sundheim Fløistad Hans Martin Hanslin Trond Knapp Haraldsen Jan Netland Helge Sjursen Per Anker PedersenSammendrag
Det er ikke registrert sammendrag
Forfattere
Thor Johannes Rogneby Ragnar Eltun Lars Nesheim Gunnlaug Røthe Randi Berland Frøseth Grete Lene SerikstadSammendrag
Prosjektet "Storskalaforsøk i økologisk korndyrking" har vært gjennomført av Planteforsk enhetene Apelsvoll, Kvithamar og Holt, Norsk senter for økologisk landbruk og Landbrukets forsøksringer i perioden 2001-2004. Hovedmålet var å demonstrere og inspirere til økt økologisk korndyrking, og dette er søkt nådd gjennom arbeid i fire delprosjekter: 1) Vekstskifteforsøk med innlagte småskalaforsøk, 2) Storskalaforsøk med kornarter/kornsorter, pløyetidspunkt og husdyrgjødselsmengder, samt forsøk med kvalitet av krossa korn, 3) Kartlegging av demonstrasjonsgårder med vekt på agronomi og økonomi, 4) Kunnskapsformidling med markdager, kurs, møter, informasjonsmateriell og samarbeid med andre prosjekt.
Forfattere
Guro BrodalSammendrag
Det er ikke registrert sammendrag
Forfattere
Trygve S. AamlidSammendrag
Normalt gir fôrsorten Knut engrapp nesten dobbet så stor frøavling som plensorten Ryss, men i 2004 varf forholdet motsatt. Sannsynligvis skyldes dette at det var mye tomt og lett frø i Knut i 2004, noe som igjen kan skyldes de spesielle værforholda våren 2004, med ekstrem varme i andre uke av mai etterfulgt av tørke og frostnetter i slutten av måneden. Prøverensing av et Knut-parti ved Planteforsk Landvik viser at det dårlige avlingsresultatet i 2004 neppe skyldes for hard rensing.
Forfattere
Audun KorsæthSammendrag
Det er ikke registrert sammendrag
Forfattere
Tor Arvid Breland Anne Kjersti Bakken Trond K Haraldsen Trygve S. Aamlid Tore E SveistrupSammendrag
Temporal changes in the scores of selected soil fertility indices were studied over six years in three different cases of organic crop rotation located in southern, eastern and central Norway (Bakken et al. in press). The cropping history and the initial scores of fertility indices prior to conversion to organic cropping differed between the sites. Crop yields, regarded as an overall, integrating fertility indicator, were in all rotations highly variable with few consistent temporal trends following the first year after conversion. On the site in eastern Norway, where conversion followed several years of all-arable crop rotations, earthworm number and biomass and soil physical properties improved, whereas the system was seemingly degrading with regard to P and K trade balances and contents in soil. On the other two sites, the picture was less clear. On the southern site, which had a relatively fertile soil before conversion, the contents of soil organic matter and K decreased during the six-year period, but the scores of other fertility indices showed no trends. On the site in central Norway, there were positive trends for earthworm-related indices such as worm biomass and tubular biopores and negative trends for soil porosity. The results, especially those from the eastern site, illustrate the general difficulty in concluding about overall fertility or sustainability when partial indicators show divergent trends. Consequently, the study gave no unambiguous support to the initial working hypothesis that organic farming increases inherent overall soil fertility, but rather showed that the effect varied among indicators and depended on status of the cases at conversion. It is concluded that indicators are probably better used as tools to learn about and improve system components than as absolute measures of sustainability.
Sammendrag
Det er ikke registrert sammendrag
Forfattere
Gustav Fystro Anne Kjersti BakkenSammendrag
Surface liming as a means for controlling the soil reaction in established leys was investigated in a series of 4-year field trials. Application of 625, 1250, 2500 or 5000 kg CaO equivalents/ha in spring of the first year caused an immediate rise in pH in the top 0"25 mm of the soil. The rate and range of the response below 25 mm was related to the precipitation at the experimental sites. Lime-induced changes in pH were not dependent on the initial level of soil reaction, whereas the positive response in grass production was greater and more immediate at sites where pH was below 5.3 rather than above. The increases in yields of macro elements were, in most instances, relatively lower than the increases in dry matter (DM) yields. Important exceptions here were the yields of Ca in all cuts and P in the second cuts, and the yields of Mg when dolomite rather than limestone was applied. The concentration of Ca in the herbage was positively a.ected by liming according to ruminant needs. The same holds for the concentration of Mg when granulated or coarse dolomite was applied. Liming lowered herbage uptake of Mn, Co and Zn, whereas Mo uptake was increased. There appeared to be no consistent relationship between liming and the plant uptake of Fe and Cu. Dependent on the initial conditions, liming might both improve and worsen the trace element status of harvested herbage with respect to the demands of ruminant animals. It is concluded that frequent surface liming at low rates might be an appropriate strategy for adjusting the soil pH in semi-permanent and permanent pastures.