Publications
NIBIOs employees contribute to several hundred scientific articles and research reports every year. You can browse or search in our collection which contains references and links to these publications as well as other research and dissemination activities. The collection is continously updated with new and historical material.
2019
Abstract
We grew young sweet cherry (Prunus avium L.) trees under controlled temperature and natural summer daylight conditions in order to study the control of flowering of the species. Two experiments with the cultivars ‘Lapins’ and ‘Van’, were conducted and compared with field results with the same cultivars at Ås in southeast Norway (59° 40′N, 10° 50′E, 90 m a.s.l.). Shoot growth increased with increasing temperature in the 12–21 °C range, but ceased in late summer (August) regardless of temperature conditions. A marked drop in temperature always induced an immediate cessation of growth. Under field conditions at Ås, both growth cessation and floral initiation took place by about 1 August. Low temperature (12–15 °C) significantly enhanced flowering of both cultivars compared with 21 °C, which tended to depress flower bud formation during the summer but stimulated the subsequent flower differentiation process. These results concur with earlier regression analyses, which revealed a close positive correlation between historical records of sweet cherry yields over a 40-year period in farmer’s fields in the fjord districts of western Norway and previous year August-September temperature, and a negative correlation with previous year July temperature. Practical implications of the results are discussed and it is suggested that inadequate temperature control in rain-protected cultivation in plastic tunnels might have negative consequences for next year’s flowering and yield.
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This a first report from testing of NanoGro on established fairway. The aim of the trial was to investigate the potential of NanoGro to improve turfgrass quality and reduce fertilizer cost on established turf at fairway mowing height in a Scandinavian environment.The experiment was conducted in May-October 2019 at the NIBIO Turfgrass Research Center Landvik. NanoGro improved turf quality when no fertilizer was applied. However, NanoGro had no effect when combined with turfgrass fertilizers.
Authors
Lars T. HavstadAbstract
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Authors
David Natcher Yang Yang Jill Hobbs Kristin Beate Hansen Florent Govaerts Silje Elde Ingrid Kvalvik Bjørg Helen Nøstvold Rune Rødbotten Sigridur Dalmannsdottir Hilde Halland Eivind Uleberg Ólafur Reykdal Jón Árnason Páll Gunnar Pálsson Rakel Halldórsdóttir Óli Þór Hilmarsson Gunnar Þórðarson Þóra ValsdóttirAbstract
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