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
Erland Kjesbu Håvard MjeldeSammendrag
Det er ikke registrert sammendrag
Forfattere
Tor Håkon Sivertsen Trond RafossSammendrag
A small fruit growing area of southern Norway is chosen as a pilot area. This area contains four automated meteorological stations owned by The Norwegian Crop Research Institute. The measurements made at the stations are hourly recordings of precipitation, air temperature, leaf wetness and relative humidity of the air, plus some additional measurements at some stations. The area has a relatively smooth topography with hills and no mountains. The highest point is located about 300 m above the sea level, and the lowest 15 m above sea level. The remote sensing research group at The Norwegian Meteorological Institute is providing the hourly radar measurements of precipitation, from two different weather radars. All the precipitation data used is documented according to a system developed by The Norwegian Crop Research Institute, and for the growing season ahead data will be distributed to the local private extension service, but this year there will be no development of biological models serving the fruit growers (apple scab etc) using all the additional relevant data. The outcome of the use of the operational use of the data in the coming growing season, will be comparing the data from the different sources, and looking closer at the possible significance of the use of a documentation system for the data from different sources. Finally the quality of the data is discussed, as well as the possible steps to be taken for future and extended use of such data.
Forfattere
Guillaume Besnard Virginie Acheré Sylvain Jeandroz Øystein Johnsen Tore Skrøppa Patricia Faivre Rampant Jean-Michel FavreSammendrag
Det er ikke registrert sammendrag
Forfattere
Christian Uhlig Alexander Zink Timo KumpulaSammendrag
Mammalian herbivores generally influence their pastures significantly. However, detectable changes in pastures due to grazing activities are rather difficult to classify and their practical usability for herders are therefore generally low.The aim of this research was to create a general concept for field observations to estimate the state of reindeer pastures. Furthermore, the object was to compare obtained results with remote sensing data.
Forfattere
Åsmund Asdal T.A. BrelandSammendrag
Det er ikke registrert sammendrag
Forfattere
Anne-Kristin Løes Anne Falk ØgaardSammendrag
On five long-term organic dairy farms aiming at self-sufficiency with nutrients, soil concentrations of ammonium-acetate lactate extractable potassium (K-AL) and acid-soluble K was measured twice in topsoil (0-20 cm) and subsoil (20-40 cm) over periods of 6-14 years. Organic management had occurred for > 9 years at the second sampling. On average there were most probably field level K-deficits. Even so, topsoil K-AL concentrations were medium high (65-155 mg K kg-1 soil), and did not decrease during the study period. However, for three farms, topsoil K-AL was approaching a minimum level determined by soil texture, where further decrease is slow. Subsoil K-AL concentrations were generally low (< 65). The soils were mostly light-textured, and reserves of K-releasing soil minerals (illite) were low, never exceeding 6% of the mineral particles < 2 mm ". Topsoil acid-soluble K concentrations were low (< 300 mg K kg-1 soil) on two farms, medium (300-800) on three farms and decreased significantly on one farm. Cation-exchange capacity increased on two farms. This may indicate increased amount of expanded clay minerals caused by K-depletion. On self-sufficient organic dairy farms, purchased nutrients will be required by low soil nutrient reserves to avoid seriously decreased yields and quality of crops.
Sammendrag
Et prosjekt som har som mål å studere for seinere å kunne minimere N-tap fra grønngjødsling er beskrevet. Prosjektet er del av et større arbeid (strategisk instituttprogram) i Planteforsk som går på økologisk korndyrking.
Forfattere
P.I. KraftSammendrag
Det er ikke registrert sammendrag
Sammendrag
Areas near the Norwegian-Russian border are being strongly contaminated by heavy metal emissions from copper-nickel smelters in the Kola peninsula. The present report presents data for the four elements arsenic, chromium, cobalt, and selenium in vegetation sampled in eastern Finmark, obtained by neutron activation analysis. It is no doubt that the smelters in Nikel and Zapolyarny, constitute the main source of these elements in this area. Some chromium comes from local domestic sources. Still, however, the concentration of these elements in soil and vegetation are probably too low as such to represent any harm to the ecosystem.
Forfattere
Espen Govasmark Turid Strøm Arvid Steen Anne Kjersti Bakken Sissel HansenSammendrag
Innholdet av et utvalg sporstoffer er analysert i planteprøver fra 28 norske økologiske husdyrbruk. Innholdet er diskutert opp mot jordforhold, artssammensetning i enga, geografisk beliggenhet og husdyras behov.