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.
2010
Forfattere
Kerstin Mammitzsch Christian Guido BrucknerSammendrag
Det er ikke registrert sammendrag
Sammendrag
Results from 4 field trials, see full poster in attached file
Sammendrag
Plant responses to elevated CO2 are governed by temperature, and at low temperatures the beneficial effects of CO2 may be lost. To document the responses of winter cereals grown under cold conditions at northern latitudes, autumn growth of winter wheat exposed to ambient and elevated levels of temperature (+2.5°C), CO2 (+150 µmol mol-1), and shade (-30%) was studied in open-top chambers under low light and at low temperatures. Throughout the experiment, temperature dominated plant responses, while the effects of CO2 were marginal, except for a positive effect on root biomass. Increased temperature resulted in increased leaf area, total biomass, total root biomass, total stem biomass, and number of tillers, but also a lower content of total sugars and a weaker tolerance to frost. The loss of frost tolerance was related to the larger size of plants grown at elevated temperature. The 30% light reduction under shading did not affect the growth, sugar content, or frost tolerance of winter wheat. At the low temperatures found at high latitudes during autumn, the atmospheric CO2 increase is unlikely to enhance autumn growth of winter wheat to any significant extent, while a temperature increase may have important and major effects on its development and growth.
Sammendrag
P>Autumn growth of weeds (i) provides an opportunity for mechanical and chemical control in autumn and (ii) can be important for weed survival and infestation in the following spring. Growth characteristics of Elytrigia repens, Cirsium arvense and Sonchus arvensis in autumn were studied in 2004 and 2005, on plants of different origins and developmental stages (planted at various times from May to August). The plants were grown outdoors in large pots and were assessed during September and October each year. The study showed that (i) all species grew in autumn, but growth ceased and the species withered at different times; S. arvensis first, followed by C. arvense and then E. repens and (ii) less developed (i.e. younger) plants grew later in the autumn. This was demonstrated by leaf area development and biomass distribution during autumn. Older plants had a greater total biomass with relatively more rhizomes or creeping roots than younger plants. In young plants of C. arvense and S. arvensis, the biomass of creeping roots increased during autumn. The total biomass, however, changed little during autumn. These growth patterns indicate that E. repens will be the easiest, S. arvensis the most difficult and C. arvense in between, regarding control of these species in autumn.
Forfattere
Nanna Lien Hege Henriksen Lena Lie Nymoen Marianne Wind Knut Inge KleppSammendrag
Det er ikke registrert sammendrag
Forfattere
Anne BøenSammendrag
Det er ikke registrert sammendrag
Forfattere
Anne BøenSammendrag
Det er ikke registrert sammendrag
Forfattere
Astrid JohansenSammendrag
Over tre år har fleirårig raigras under hyppig hausting gitt slike store avlingar som ei vintersterk, "norsk" beiteblanding i Stjørdal. Begge gav fôr med lågt fiberinnhald og høg passasjehastigheit, spesielt på forsommaren. Innhaldet av vassløyselege karbohydrat, protein go kalsium var nært knytt til kor mykje kløver det var i bestandet.
Forfattere
Gunhild Børtnes Ruth MordalSammendrag
Det vart samla inn 71 frøparti av vill karve frå alle fylker i landet. Det vart planta ut karve i september 2007 på Bioforsk Øst Apelsvoll på Østre Toten i Oppland. Karvefrø vart hausta i juli 2009. Det var stor variasjon i vekseform, avling og kvalitet som innhald av eteriske oljar. Høgast frøavling hadde karveplanter frå frø samla inn i Røyken, med 23 gram per plante.
Forfattere
Ola HanserudSammendrag
Det er ikke registrert sammendrag