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
Mekjell Meland Eva BirkenSammendrag
The European plum cultivar ‘Jubileum" blossoms abundantly most years and too many flowers can be set if not properly thinned. For two seasons started in 2007 mature ‘Jubileum/St. Julien A were treated with ethephon when full bloom opened at concentration of 250, 375 and 500 ppm and at 10-12 mm fruitlets stage at concentration of 125, 250 and 375 ppm. The experimental design was completely randomised with 6 replications of single trees. The trees were sprayed to run-off with a hand sprayer when temperature was above 15 ºC. All thinning treatments reduced the fruit set significantly. The fruit set decreased with increasing ethephon concentration, and the highest rates at bloom and fruitlet overthinned. Less dosage of ethephon was required at fruitlet time in order to obtain the same fruit set. The yield did confirm the fruit set response and the yield reductions were significant. All thinning treatments gave higher percentage of fruits larger than 38 mm fruit size compared to the unthinned control. Fruit quality characterized by blue surface cover and the content of soluble solids was in general high and increased significantly by reduced fruit. Fruit firmness, however, slightly declined in the ethephon thinned trees. Other fruit quality parameter like percentage acid content did not show a clear response to the thinning. Return bloom was little improved on thinned trees the following year. The crop load per tree was reduced to about the half of the previous year control trees included. In conclusion, ethephon application at a rate of 375 ppm applied at full bloom or 250 ppm at 10 mm fruit diameter thinned ‘Jubileum" plums to a target of about 10 -15 % fruit set.
Forfattere
Greg Lang Greg LangSammendrag
Intensive sweet cherry production (Prunus avium L.) in tunnel covered orchard systems offer an advantage of reducing rain-induced fruit cracking and other secondary advantages such as manipulation with the environment and fruiting. The research objective is to develop a management system to delay fruit maturity in sweet cherry trees for producing late season, high quality fruits for the export market. In May 2005 a Haygrove multibay tunnel system was installed at the experimental farm at Bioforsk Ullensvang, Norway. It consisted of four bays (8.5 m width and 70 m long each). It was built on 2.5 m legs and has an open kit strut system fully accessible for tractor. In these tunnels feathered 1-year old sweet cherry ‘Sweetheart"/Colt trees were planted; two rows in each tunnel. Trees were planted in four-tree plots with ‘Lapins" as guard tree in between and trained as free spindles. Planting distance was 2.0 x 4 m. Each tunnel was splitted into two halves covered with plastic covers having different light spectral transmittance; Luminance THB film (absorbing infrared light) and traditional Visqueen clear UV polythene film. Two tunnels were covered before bloom by the end of April and two tunnels in early July. Subplots consisted of treating with 20 ppm gibberellin at straw yellow fruit colour and of reflective ground cover. Documentation of the environmental modifications, evaluation of tree growth, reproductive performance and impact of pests will be studied. The harvest on the control trees started in mid August. Preliminary results showed that GA3 treated trees delayed the harvest with about a week, improved fruit size and fruit firmness. Average crop per tree was 9 kg in the fourth leaf. Size distribution of the fruits showed that half of the fruits were in average larger than 32 mm in diameter. The polythene film Luminance THB reduced the temperature build up on sunny days and improved the fruit size.
Forfattere
Marianne BechmannSammendrag
Det er ikke registrert sammendrag
Sammendrag
Det er ikke registrert sammendrag
Forfattere
Marianne BechmannSammendrag
Det er ikke registrert sammendrag
Forfattere
Jon Anders StavangSammendrag
Det er ikke registrert sammendrag
Forfattere
Annbjørg Øverli Kristoffersen Bernt Olav HoelSammendrag
Det er ikke registrert sammendrag
Forfattere
Bjørn FrantzenSammendrag
9 slides som viser hvordan en abeidet med rehabilitering av sjøfugl under Full City-ulykken.
Forfattere
Agnar KvalbeinSammendrag
Artikkelen gir oppskrift på hvordan greener kan bygges på enklere måte enn UGGA anbefaler. Mange golfbaner burde velge enklere konstruksjoner både med tanke på økonomi og fordi de krever mindre ressurser til vedlikehold. Artikkelen angir trinn for trinn hvordan en green kan bygges og begrunner hva som gjør dette til en en god, men rimelig green. Hovedprinsippet er at gressrøttene skal ha tilgang på vann og næring i opprinnelig god jord. På toppen legges et vekstlag av sand som fungerer som sikrer luftfylte porer og hindrer sammenpakking av jorda under.
Forfattere
Agnar KvalbeinSammendrag
De fleste golfgreener i Norge er bygget etter en metode anbefalt av United States Golfers Association, USGA. USGA-greenen består av et veksmedium over grus. Dette produserer et hengende vannspeil og dette gjør greenen relativt fuktig til tross for at det benyttes mye grov sand.Artikkelen redegjør i et vedlegg, Fakta om USGA green, for de de nyeste anbafaligene. Selve artikkelen gir den faglige begrunnelsen for disse anbefalingene og bringer videre praktiske erfaringer knyttet til denne greenkonstruksjonen. Artikkelen går på noen områder lenger enn USGA, og anbefaler blant annet å variere tykkelsen på vekstmasse på sterkt ondulerte greener for å beholde en jevn fuktighet for gressmatta. I overgangen mellom green og greenområdet anbefales å bruke vertikal fuktsperre, og det kvaliteten på organisk materiale i vekstmassen blir diskutert.