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
Therese With Berge Steve Goldberg Kristin Kaspersen Jan Netland Øyvind Overskeid Trygve StølanSammendrag
Det er ikke registrert sammendrag
Forfattere
Therese With Berge Steve Goldberg Kristin Kaspersen Jan Netland Øyvind Overskeid Trygve StølanSammendrag
Det er ikke registrert sammendrag
Forfattere
Trygve S. Aamlid Bjørn Molteberg Frank Enger Jan Tangsveen Trond Olav Pettersen Åge Susort Anne A. SteensohnSammendrag
Due to pesticide restrictions, harsh winters and the special light/temperature conditions at high latitudes, turfgrass variety testing in USA, UK or central Europe has limited relevance for the Nordic countries. Therefore, we recommend to seed companies wanting to introduce varieties in this region to have their candidates evaluated independently in the two contrasting climatic zones characterizing the Nordic countries. In June 2009, Scotts International B.V. and Bioforsk Turfgrass Research Group signed a contract for three years evaluation of two varieties of perennial ryegrass (Lolium perenne), one variety of creeping red fescue (Festuca rubra ssp. rubra) and two varieties of Kentucky bluegrass (Poa pratensis) at the Bioforsk research stations Apelsvoll (northern, mostly continental climatic zone) and Landvik (southern, mostly coastal climatic zone). Both trials were seeded in late June / early July 2009 and established well. Since about six weeks after seeding, the varieties were mowed to at 15 mm two to three times per week and otherwise maintained as a golf course fairway. This report from the establishment year shows that the candidate varieties were on level with the widely used control varieties for establishment rate. For other characters, it is too early to draw conclusions.
Sammendrag
The results from two field trials (Landvik and Apelsvoll) showed that the use of a proper combination of nitrogen rate and topdressing level is very important for thatch control. In coastal areas with ample rainfall, velvet bentgrass should be dusted with find sand every week or at least every other week, totalling around 10-14 mm per season. Nitrogen rate should be held at a level just to get an acceptable color. Weekly grooming, monthly verticutting and spiking twice a year are also needed to control thatch on velvet bentgrass greens, but heavy mechanical treatments should be avoided due to slow recuperative capacity of velvet bentgrass.
Sammendrag
Det er ikke registrert sammendrag
Sammendrag
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Forfattere
Eirik NordhagenSammendrag
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Forfattere
Eivind Vangdal Sigrid Flatland Ingvild Kristine MehlSammendrag
Det er ikke registrert sammendrag
Forfattere
Eivind Vangdal Sigrid Flatland Ingvild MehlSammendrag
Experiments with foliar fertilization in plums have been performed in Western Norway. In one experiment possible effects of extra magnesium, potassium and the combination of both magnesium and potassium were compared to control trees given a standard foliar fertilization programme. In the other experiment the standard foliar fertilization programme was compared to control trees given soil fertilization only. Yield and fruit size as well as major fruit quality factors were registered. Leaves and fruit were analysed for major nutrients. No strong effects of foliar application with magnesium and potassium on fruit quality were observed. The treatments did not affect the content of major nutrients in leaves and fruit to such an extent that significant effects on fruit quality would be expected. The foliar fertilization programme tended to delayed maturation of the fruit as the fruit were greener and with less blush colour, firmer and had lower content of soluble solids and higher content of titratable acidity. The changes in separate quality factors were, however, not statistically significant. The foliar fertilized trees tended to have higher content of nitrogen in the leaves and lower content of the other major nutrients.
Sammendrag
The effect of potential resistance inducing chemicals on disease development of Fusarium head blight was studied in winter wheat (Triticum aestivum L.). As a pre-screening test, the effect of different treatments on development of Microdochium majus (syn. Microdochium nivale var. majus) was studied in detached leaves. Based on these tests, DL-3-aminobutyric acid, Bion (benzo-(1,2,3) thiadiazole-7-carbothioic acid S-methyl ester), and a foliar fertilizer containing potassium phosphite were selected for further studies. Greenhouse-grown winter wheat was sprayed with aqueous solutions of the potential resistance inducers 7 days prior to Fusarium culmorum point inoculation of the heads. Disease development was registered as number of bleached spikelets per inoculated spike. Spraying plants with the foliar fertilizer reduced the disease severity of F. culmorum by up to 40%. A reduced disease development of M. majus was also observed in detached leaves pre-treated with the foliar fertilizer. When the foliar fertilizer was added to the growth medium, a reduced in vitro growth of M. majus and F. culmorum was observed, indicating that the effect on disease development is at least partly due to a fungistatic effect. No significant reduction in disease development was observed in wheat pre-treated with DL-3-aminobutyric acid or Bion, although these compounds tended to reduce disease development, especially when applied in combination with other potential resistance inducers. We conclude that spraying winter wheat with a solution containing potassium phosphite can reduce development of M. majus and F. culmorum.