Anita Sønsteby
Seniorforsker
Sammendrag
Det er ikke registrert sammendrag
Sammendrag
The chilling requirements of ‘Junifer’, ‘Rovada’ and ‘Red Dutch’ red currants and ‘Mucurines’ and ‘Pax’ gooseberries were studied under controlled environment conditions. Field grown single-stem potted plants were chilled at 0°C from October 15 for 0 to 20 weeks and forced in a lighted greenhouse at 20°C and 18 h photoperiod for 60 days for recording of budbreak and flowering. None of the red currant plants were able to break without chilling, while the number of breaking buds increased linearly with more than four weeks of chilling, and fastest so in ‘Junifer’. ‘Red Dutch’ proved to have a particularly deep and stable dormancy. Comparable but markedly lower chilling requirements were found in the two gooseberry cultivars. While more than 20 weeks of chilling were required for full dormancy release in the red currant cultivars, 16 to 20 weeks were adequate for the ‘Mucurines’ and ‘Pax’ gooseberries, respectively. This compares with a chilling need of 14 weeks at 0°C previously found for most commercial black currant cultivars under the same conditions. The results also confirm that, as previously demonstrated for black currants, flower development requires more chilling than bud break itself also in red currants and gooseberries. This highlights the need for extended chilling of the plants before the plants are set to forcing in modern tunnel production. We also conclude that the red currant cultivar ‘Rovada’ with its large berry trusses seems particularly well suited for tunnel production.
Forfattere
Anita SønstebySammendrag
Det er ikke registrert sammendrag
Divisjon for matproduksjon og samfunn
RobustRubus - En optimalisert og klimatilpassa produksjon av bringebær og bjørnebær i en forlenget sesong
Divisjon for matproduksjon og samfunn
JordbærSmak: En optimalisert moderne produksjonsteknologi for mer smakfulle norske jordbær
Strawberry is an important berry specie with long traditions in Norway. Norwegian berries have a high status amongconsumers. The climate in Norway is suited to produce strawberries with excellent taste, but the season is short andthe consumers' desire for strawberries around the year has led to a sharp increase in imports in recent years. IfNorwegian strawberries are to compete with imported berries during the growing season and retain their high status,it is important to focus on quality. The opening of import of strawberry plants, have given new possibilities forproduction. The high yield potential of imported strawberry plants combined with growing in substrate in highplastic tunnels meets many of the challenges for strawberry production in Norway. In extension of this, production ofstrawberries in greenhouses and in closed systems have also become relevant. In parallel with new productionsystems and increased import, the taste-quality of Norwegian berries has been challenged. A question that has beenraised is: "Why is there so little difference in the taste of Norwegian and imported strawberries?". However,strawberry taste is complex and specific, and preferences change with several factors, such as age and gender.Strawberry flavor is a complex interaction between sugar, acid, and aroma substances. Since the ripening processstops at harvest, the content of these cannot be changed after picking. Cultivar, cultivation practices, temperatureand light are factors that alone and in combination can affect the quality of taste. The role of the cultivation factorsin modern production systems must be understood in order to improve the consumer's taste experience andoptimize the quality of the final product. TastyStrawberry's main goal is therefore to develop new knowledge thatwill create a basis for optimizing the taste of strawberries produced in modern production systems during anextended growing season in Norway.
Divisjon for matproduksjon og samfunn
Utnyttelse av trefiber og avfallsstrømmer for bærekraftige og sirkulære dyrkingsmedier i hagebruket (‘SUBTECH 2.0’)
Divisjon for bioteknologi og plantehelse
SOLUTIONS: Nye løsninger for nedvisning av potetris, bekjempelse av ugras og utløpere i jordbær og ugraskontroll i eplehager
Håndtering av ugress og andre plantevernutfordringer er viktig for å unngå avlingstap i landbruket. Tilbudet av norske rå-, mat- og fôrvarer påvirkes av at bonden lykkes med sin innsats i åker og frukthager. Et nylig forbud mot plantevernmiddelet dikvat og den usikre framtida til glyfosat – begge viktige innsatsfaktorer i norsk jord- og hagebruk – fordrer nye løsninger. Gode alternativ til ordinære plantevernmidler er dessuten velkomne som verktøy i integrert plantevern (IPV). Norske dyrkere er siden 2015 pålagt å følge IPV. Hensikten med IPV er blant annet redusert risiko ved bruk av plantevernmidler på helse og miljø.