Inger Martinussen
Head of Department/Head of Research
Abstract
The successful introduction of new cultivars depends on the evaluation of complex parameters essential for the consumers, market, and fruit producers. A new scab-resistant apple cultivar, ‘Wuranda’ (SQ159/Natyra®/Magic Star® × Honeycrisp), recently introduced in Norway and managed under the name Fryd©, is prone to biennial bearing. Therefore, one of the first tasks, investigated in Southwestern Norway by the Norwegian Institute of Bioeconomy Research, NIBIO-Ullensvang in 2021–2024, was the establishment of optimal crop load level based on the combination of productivity, fruit quality, and return bloom. The apple cultivar Fryd (‘Wuranda’) was propagated on ‘M.9’ rootstock and planted in 2019. The trial was performed in the same orchard for four consecutive years, starting three years after planting. Crop load level affected average fruit mass but had no impact on cv. Fryd fruit quality parameters at harvest such as blush, ground color, firmness, soluble solid content, or starch degradation. Fruit size variation was diminished by crop load regulation, and most fruits fell into 2–3 grading classes. Crop load, not the yield per tree, was the determining factor for the return bloom. The optimal crop load level depended on the orchard age. To guarantee a regular bearing mode of cv. Fryd planted on M.9 rootstock at a 3.5 × 1 m distance and trained as slender spindle, crop load of 5.5–6 fruits cm−2 TCSA (trunk cross-sectional area) in the 3rd year, 7.5–8 fruits cm−2 TCSA in the 4th year, and 6.5–7 fruits cm−2 TCSA in the 5th year should be maintained.
Authors
Anna Avetisyan Ivan Gabrielyan Tigran Ghrejyan Mark Kalashian Marine Movsesyan Mane Tadevosyan Amalya Iskandaryan Anne Muola Laura Elina Jaakola Inger MartinussenAbstract
No abstract has been registered
Authors
Thomas Georges A Bawin Grzegorz Konert Corine Alexis Faehn Markku Juhani Keinänen Kirsten Krause Inger Martinussen Laura Elina Jaakola Katja Hannele KarppinenAbstract
The Climate Laboratory in Tromsø offers excellent facilities for controlled growth experiments. In an attempt to provide for future needs to perform qualitative and quantitative analysis of plant growth and plant traits at the laboratory scale, UiT and NIBIO have jointly implemented state-of-the-art monitoring and imaging systems as part of the strategic project ABSORB (https://site.uit.no/absorb/). Here, we present a 3D multi- and 2D hyper-spectral imaging platform, augmented with thermal analysis capabilities, tailored for plant phenotyping in both research and teaching contexts. The 3D imaging component of the PlantEye F600 laser scanner provides effortless and accurate non-invasive assessments of plant architecture and growth dynamics. Three complementary 2D hyperspectral cameras deliver more detailed spectral information across a 400-1700 nm range of wavelengths, supporting in-depth analysis of biochemical composition and stress responses at the macro- and micro-scales. We showcase the platform's versatility through two compelling experiments investigating drought-stress and light-inhibition, respectively. In the drought-stress experiment, we observed plant responses to water scarcity, tracking physiological changes and morphological adaptations with our integrated imaging system. In the light-inhibition experiment, we further explored the impact of light intensity on plant growth and development. We envision collaborative efforts to address the current challenges in plant biology, agriculture, and environmental science.
Division of Food Production and Society
Emission-free smart greenhouse farming: increasing tomato production while reducing energy needs in a closed greenhouse system using an Environmental Control System
Division of Food Production and Society
Sustainable growth of the Norwegian Horticulture Food System – GreenRoad GS35 (“GrøntStrategi mot 2035)
The main aim of GreenRoad is to deliver knowledge and solutions for increased value creation and sustainability in the horticultural food system in Norway.