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.
2009
Forfattere
Trygve S. Aamlid Oiva NiemelainenSammendrag
The main objective of this project was to provide documentation for potential registration of Primo MAXX® for use on Nordic golf courses. The project started in 2007 with trials according to Good Experimental Practise standard at Landvik, Norway and Lepaa, Finland. Primo MAXX® was applied at monthly rates varying from 0.2 to 0.8 L ha-1 on greens and 0.5 to 3.0 L ha-1 on fairways. These treatments resulted in average clipping yield reductions of 18% on bluegrass/fescue fairways and 21% on creeping bentgrass greens. Growth suppression during the first two weeks after application was often followed by a rebound effect during the remaining two weeks until next application. While significant losses in turfgrass quality occurred at rates 1.0 L ha-1 and higher the fairway trial at Landvik, monthly applications of at least 1.5 L ha-1 ha resulted in less snow mould (Microdochium nivale) and faster spring green-up in 2008 in the fairway trial at Lepaa. Because of the discoloration and rebound effects in 2007, Primo MAXX® was applied at lower rates but higher frequencies in new trials established 2008. In a green trial at Landvik, weekly or biweekly applications of 0.15, 0.30 and 0.45 L ha-1 were compared with an unsprayed check. On average for application rates and frequencies, Primo MAXX® had no effect on turfgrass overall appearance or density but reduced clipping yield by 25% and increased ball roll distance by 6%. In a new fairway trial at Lepaa, biweekly applications of 0.4, 0.8, 1.2 and 1.6 L ha-1 had no effect on turfgrass quality but reduced clipping yields by 15, 23, 23 and 34%, respectively. Rebound effects were virtually absent in the 2008 trials. Spring observations in Finland in 2009 confirmed less snow mould and better overall appearance on plots that had been sprayed with Primo MAXX® in 2008. In conclusion we have recommended that Primo MAXX® be labeled for use on Nordic golf courses at the following rates and application frequencies. Rate*Application intervalGreens (creeping bentgrass)0.2 - 0.4 L ha-1Every 1 to 2 weeksFairways (Kentucky bluegrass / red fescue)0.6 - 1.2 L ha-1Every 2 to 3 weeksRoughs & semi-roughs (Kentucky bluegrass / red fescue)1.0 - 2.0 L ha-1Every 3 to 4 weeks *Always use lowest rate for the first seasonal application of Primo MAXX®. As of 1 January 2010, Primo MAXX® has been approved for turfgrass use in Iceland. Applications are pending in Finland, Sweden and Norway.
Forfattere
Trygve S. Aamlid Trond Olav Pettersen Tatsiana Espevig Siv Lene Gangenes Skar Agnar KvalbeinSammendrag
Det er ikke registrert sammendrag
Forfattere
Trygve S. Aamlid Tatsiana Espevig Trond Olav Pettersen Siv Lene Gangenes Skar Agnar KvalbeinSammendrag
Soil water repellency (SWR) is a common phenomenon on sand-based golf greens. Soils are considered severely water repellent if water droplets remain on the surface of undisturbed, air-dried soil samples for more than 600 seconds before penetrating. The objective of this research was to evaluate the potential of a surfactant to overcome SWR and restore turfgrass quality on a green with severe drought symptoms. The surfactant Aqueduct® was applied at a rate of 25 L ha-1 at weekly intervals from 4 June through 25 June 2008, either alone or after aeration with solid tines to 5 cm depth before each application. The experiment was irrigated uniformly corresponding to 1.65 times pan evaporation values from 4 June till 12 June, after which irrigation was not necessary due to natural rainfall. Conspicuous and statistically significant improvements in turfgrass quality occurred 10-12 days after the first application of surfactant, and the difference from untreated control plots continued to increase for about two and a half months after the completion of treatments. The improvement was accompanied by a significant increase in the SWC of the 0-20 cm soil layer and a deeper root system. The difference in WDPT between treated and untreated plots was significant at 1 cm, but not at 2, 3, 5 or 10 cm soil depths which were always far more water repellent than the thatch layer. Repeated aeration had no significant effect on turfgrass quality, and there was no significant interaction between surfactant and aeration treatments.
Forfattere
Lise Hatten Ann NorderhaugSammendrag
Det er ikke registrert sammendrag
Forfattere
Annbjørg Øverli Kristoffersen Bernt Olav HoelSammendrag
Det er ikke registrert sammendrag
Sammendrag
Fylkesmannen finansierer konfliktdempende og forebyggende tiltak i et forsøk på å begrense tap av rein til rovvilt. Enkelte tiltak har blitt ansett som mer effektive enn andre og har dermed større sjanse for å bli finansiert enn andre. Spørsmålet er om disse prioriterte tiltakene virkelig er mest effektive, eller om det finnes andre tiltak som burde fått større oppmerksomhet. Vi har spurt reindrifta for å få deres erfaringer og holdninger på området.
Forfattere
Trygve S. Aamlid Agnar KvalbeinSammendrag
Det er ikke registrert sammendrag
Forfattere
Trygve S. Aamlid Agnar Kvalbein Trond Olav PettersenSammendrag
Det er ikke registrert sammendrag
Forfattere
Torbjørn Alm Anders OftenSammendrag
Det er ikke registrert sammendrag
Sammendrag
Det er ikke registrert sammendrag