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.
2026
Authors
Ingunn Øvsthus T. Radovanović Vukajlović M. Martelanc G. Antalick L. Butinar A. Hermes B.T. Grein Mats Carlehög B. Mozetič VodopivecAbstract
No abstract has been registered
Abstract
Greenhouse cultivation can help meet food demand in a growing and increasingly urbanised population. Reliance on fossil-fuel heating and natural ventilation often makes conventional greenhouses energy- and carbon-inefficient. Closed greenhouses address these limitations through resource recycling and energy recovery. While a centralised environmental control system (ECS) integrating climate control and heat harvesting has shown potential to improve greenhouse crop performance at high latitudes, its year-round energy use and energy-related carbon footprint reduction potential remains insufficiently quantified. This study extends an existing dynamic greenhouse climate model to incorporate a novel centralised ECS integrating air recirculation, heating, cooling, and heat harvesting in (semi-)closed greenhouses. The model was validated using experimental data from Norway, reproducing temperature and relative humidity with RMSEs of 1.40–1.63 °C and 7.60–8.55%, respectively. Energy use and tomato yield were predicted with relative errors of 3.8–8.4% and 1.6–4.2%, respectively. Scenario simulations under Norwegian conditions showed that (semi-)closed greenhouses with heat harvesting can reduce fossil fuel use by over 80% while increasing tomato yields by 15–41% relative to open greenhouses, driven by changes in CO2 concentration and temperature following reduced ventilation and heat recovery. The performance of a fully closed greenhouse relying solely on on-site cold storage is constrained by cooling capacity and buffer size, particularly during summer; adding a supplemental cold energy source such as surface water can improve its performance. Despite heat harvesting, a residual boiler heating demand of 3–10% remains. Further gains in energy efficiency and crop performance may be achieved through optimised climate control.
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No abstract has been registered
Authors
Anne Linn Hykkerud Meeri Santikko Michel Verheul Baoru Yang Niina Kelanne Dmitry Kechasov Anita SønstebyAbstract
No abstract has been registered
Authors
Darius KviklysAbstract
No abstract has been registered
Abstract
Limited information is available on cranberry crop load management. Earlier research has primarily examined flower thinning in cranberry, while the impact of fruit thinning has not yet been investigated. This study evaluated the effects of fruit thinning during early fruit development on fruit quality, return bloom, and chlorophyll fluorescence in two cranberry (Vaccinium macrocarpon) cultivars, “Pilgrim” and “Stevens.” Treatments included: (0F) removing all fruits on the upright, (1F) removing all but the lowermost fruit, (2F) removing all but the two lowermost fruits, and (C) no fruit removal (control). The majority of the non-treated uprights produced two fruits in “Pilgrim” and three fruits in “Stevens.” In “Pilgrim,” 1F resulted in heavier fruit with higher anthocyanin concentration but lower concentrations of total soluble solids (TSS) and titratable acidity (TA). In “Stevens” 1F and 2F resulted in heavier fruit but had little effect on TSS and TA, while 1F decreased fruit anthocyanin. The effects on fruit surface color were negligible. In both cultivars, return bloom was enhanced by removing all fruit on the upright indicating a strong biennial bearing tendency of individual uprights. Fruit production strongly suppressed vegetative growth of uprights in the following year, especially in “Pilgrim.” Chlorophyll fluorescence kinetic parameters decreased in 0F, indicating lower photosynthetic efficiency in the absence of fruit. The results suggest that fruit thinning is an effective approach for increasing the individual fruit weight of cranberry crop and that cranberry fruit are strong sinks that effectively suppress generative and vegetative growth of the uprights in the subsequent year.
Abstract
No abstract has been registered
Abstract
No abstract has been registered
Authors
Nora Røhnebæk Aasen Sybil A. Herrera-Foessel Silius Mortensønn Vandeskog Therése Bengtsson Mulatu G. Dida Isak Drozdik Sigridur Dalmannsdottir Egill Gautason Jaroslaw S. Grodek Hrannar S. Hilmarsson Merja Högnäsbacka Ortrud Jäck Janne Kaseva Antti Laine Alex Lenkoski Morten Lillemo Min Lin Anne Marthe Lundby Shirin Mohammadi Per Jarle Møllerhagen Markku Niskanen Rodomiro Ortiz Maxie Skalshøi Anna G. Þórðardóttir Maria ThorkildsenAbstract
Climate change will substantially impact agriculture, requiring the development of new crop cultivars adapted for resilience to future stresses. Developing a new crop cultivar is a decades-long process. Therefore climate change considerations must already be incorporated into breeding programs. National breeding programs have typically involved field trials in a single country, which has functioned satisfactorily during periods of stable climate variability. However, it is widely acknowledged that when field trial information across borders is made available, it can significantly aid plant breeding programs. This paper presents a pan-Nordic multi-environment dataset that consolidates national trial data and data from VCU (Value for Cultivation and Use) trials for spring barley, red clover, and potato, during 1970–2024. The dataset harmonizes information on yield across diverse environments, enabling comparative analyses and cross-regional assessments. By providing a unified resource for the Nordic region, this dataset supports the development of more resilient crop varieties and facilitates data-driven breeding strategies under changing climatic conditions.
Authors
Mats Carlehög Stine Therese Alm Hersleth Marianne Hotle Benedikt Tobias Grein Ingunn ØvsthusAbstract
No abstract has been registered