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.
1999
Forfattere
Espen Haugland R.J Froud-WilliamsSammendrag
1. In order to investigate the factors influencing the establishment of seedlings in permanent grassland, the influence of soil moisture and nitrogen fertilisation on competition between established Lolium perenne and seedlings of Phleum pratense or Trifolium pratense was studied in two experiments under greenhouse conditions using the `split-box"-technique. 2. There was no difference in the production of plant dry matter of P. pratense or T. pratense between 30 % volumetric soil water content (-0.005 MPa) and 22 % (-0.04 MPa), but 15 % soil moisture (-0.33 MPa) reduced plant growth. L. perenne yields were linearly reduced by reduced soil moisture content. 3. Shoot competition from L. perenne reduced the plant dry matter yield of P. pratense and T. pratense more than did root competition in these experiments. When shoot competition was present, differences between moisture contents were not detected, indicating that light was probably the limiting resource under such conditions. No significant interaction between root competition and soil moisture were observed for plant weight. 4. Root competition was not prevented even though sufficient water and nitrogen were supplied. This indicated either that some other growth factor was limiting or the plants competed for resources at the root hair level even though sufficient resources were supplied at the pot or field scale. Therefore, in the situation of direct drilling of species during grassland renovation, it may be difficult to alleviate competition by adequate provision of water and nitrogen.
Forfattere
Rolf Nestby R BjørgumSammendrag
Planter av "Bounty", "Korona" og "Senga Sengana"ble frosset ved -8, -12, -16 og -20 °C. Vekst og avling ble undersøkt
Forfattere
Trygve S. AamlidSammendrag
Det er ikke registrert sammendrag
Forfattere
Trygve S. AamlidSammendrag
Det er ikke registrert sammendrag
Forfattere
B Darvas Arild Andersen Cs ThuròzySammendrag
Biologi og forekomst for snyltevepsarter som angriper havrebladminerflue
Sammendrag
To nye vertplanterarter for poinsettiamosaikkvirus er beskrevet, Euphorbia cornastra og Euphorbia bubalina
Sammendrag
Det er ikke registrert sammendrag
Forfattere
A ErstadSammendrag
Familieutvalg i rogn med 60 familier fra hele Sogn og Fjordane. Fenologiske og morfologiske egenskaper varierer, slik at det kan skilles mellom en maritim og en kontinental type. Utprøving av utvalgte familier i maritimt og kontinentalt klima..
Forfattere
Anne Kjersti Bakken Olav Arne BævreSammendrag
The Alstroemeria cultivars Diamond, King Cardinal and Libelle were grown for 18 month under five lighting regimes with and without soil cooling. The aim was to optimize the daily investment of light energy from artificial sources with respect to photoperiod and photosynthetic fluence rates and to elucidate possible links between reactions to photoperiod and root-zone temperature. the more photons that were supplied to the plants per day, the higher was the total production of floweringstems. The total yield from regimes with 13 mol -2 day -1 was higher was higher when the light was spread over 20 and 60 hours compared to 12 hours. In treatments with soil coolong the plants flowerd continously under aall combinationa of photoperiods and photosynthetic fluence rates, and the summer and autumn recession in flower production that occured for non-cooled "Kong Cardinal" and "Diamond" was the same under all lightening regimes. it is concluded that it might be more cots-effective to spread the daily investment of light over 20 than 16 or 12 h when the total energy budget and co2 cost are taken inti consideration.
Forfattere
A ErstadSammendrag
Demonstrasjonsfelt klimaplanting på Vigra, med 17 ulike arter. Etablering og utvikling, bruk av fremmede arter, tilpassing til jordsmonn.