Mirjana Sadojevic
Overingeniør
Sammendrag
Det er ikke registrert sammendrag
Sammendrag
Dokumentet presenterer resultatene fra sortstesting av jordbær utført i 2024 ved NIBIOs forskningsanlegg i Tromsø og Apelsvoll. Hensikten med testen var å identifisere jordbærsorter som kombinerer høy avling med god smak og kvalitet, spesielt under de varierende vekstforholdene i Norge. Den største avlingen på engangsbærene sorter ble registrert hos sorten ‘Parlando’, etterfulgt av ‘Sonsation’ og ‘Falco’. Generelt hadde Tromsø høyere andel store bær sammenlignet med Apelsvoll, og det ble registrert lav utsortering av bær. Avlingen for remonterende sorter varierte fra 900 til 1150 g per plante. ‘Aurora Karima’ hadde høyest avling, mens ‘Florice’ og ‘Favori’ også hadde høye avlinger. Smaken av jordbær ble vurdert basert på sukker- og syreinnhold. ‘Jenkka’ og ‘Magnum’ hadde høyest sukkerinnhold, mens ‘Dahli’ og ‘Parlando’ hadde lavere innhold. Bær dyrket i Tromsø hadde generelt bedre smak enn de fra Apelsvoll.
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.