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
R Hillestad N Bergan Trygve S. AamlidSammendrag
Det er ikke registrert sammendrag
Forfattere
Trygve S. Aamlid O. Heide B. BoeltSammendrag
Det er ikke registrert sammendrag
Sammendrag
Det er ikke registrert sammendrag
Forfattere
Helge BonesmoSammendrag
The applicability of an expolinear growth equation for describing dry matter yield was investigated in seven field experiments for spring growth of timothy (Phleum pratense L.) and meadow fescue (Festuca pratensis Huds) under two levels of nitrogen application. The equation was expanded by a growth index (GI) correcting for variations in radiation, temperature, and plant available soil moisture and an ageing function describing the decrease in growth rate caused by advance in phenological development. The field sites covered a wide range of climatic conditions and the yield was recorded at five phenological stages from leaf stage to anthesis. The expansion of the equation appeared to be adequate for a combined analysis of the dry matter yield in meadow fescue and timothy. The estimated maximum growth rate during the linear phase (Cm) did not differ significantly between species. Cm increased with higher nitrogen application. It was concluded that Cm of the expanded model represented a potential rate, whereas the relative growth rate of the exponential phase (Rm) could not be considered as a potential rate. It varied more among locations and years, e.g. it was strongly affected by length of the period from growth onset to the start of the linear phase.
Forfattere
Helge BonesmoSammendrag
The relationship between phenological stage at the first cut and the subsequent regrowth rates was studied in seven field experiments with timothy (Phleum pratense L.) and meadow fescue (Festuca pratensis Huds.) under two levels of nitrogen application. The field sites were selected to cover a wide range of climatic conditions in Norway. Five weekly yield samplings during the regrowth periods were fitted to an expolinear growth equation to determine initial maximum relative regrowth rates (Rm) and maximum regrowth rates (Cm). The step from actual to potential rates was accomplished by weighting the obtained rates with a weather index. For both species Rm was highest after an initial cut at the early vegetative stage. It was reduced by 50% at jointing whereupon there was no change with later cuts. For both species the Cm declined sharply with cutting time through the early stages of phenological development, whereas from early heading to anthesis there was no significant change. Compared with timothy, the Cm values of meadow fescue were higher after cut at the leaf stage and lower after cut at anthesis. For both species and for all stages of first cut the Cm increased with increasing N application, whereas Rm was not significantly affected.
Sammendrag
Two inbred rapeseed lines differing in aliphatic glucosinolate content and the reciprocal hybrids between them were grown under greenhouse conditions until seed maturity at three levels of sulphur supply. Heterosis was confirmed for seed yield and yield related traits irrespective of sulphur supply. Seeds harvested from the F1-hybrid plants were all high in aliphatic glucosinolates. The line low in aliphatic glucosinolates yielded seeds that were lower in methionine and cysteine than the other genotypes did at all levels of sulphur supply. It was, however, not more severely affected by suboptimal supply than the line high in glucosinolates
Forfattere
I. Nordal K.B. Haraldsen Åshild Ergon A.B. EriksenSammendrag
Copper mine populations of Lychnis alpina are shown to be significantly more resistant to increased copper concentrations compared to populations on normal soils. Data obtained from isozyme polymorphism analysis revealed that although the copper populations display considerable variation, they have lower genetic variability than the populations from normal soils, both on a local and a global scale, thus indicating a slight founder effect. Copper ecotypes in L. alpina have originated independently. The results are similar to what recently have been reported in heavy metal tolerant populations of Armeria maritima
Forfattere
T.A. Breland T. Persson T. Katterer O. Andren V. Huhta Trond Henriksen A. Lomander U. SeyferthSammendrag
Det er ikke registrert sammendrag
Forfattere
T.S. AamlidSammendrag
Forsøk på Landvik viser at vi kan få gode timoteifrøavlinger i andre engår ved å etablere den økologiske timoteifrøenga sammen med alsikekløver eller en norsk sort av kvitkløver.
Forfattere
T.S AamlidSammendrag
Som ledd i prosjektet "Produksjon av engfrø i økologisk landbruk" drog sommeren 1999 tolv norske frøavlere på tur til Danmark. Artikkelen formidler inntrykk fra økologisk frøavl av raigras og rødkløver.