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.
2025
Abstract
This study evaluates the effectiveness of various peat-free and peat-reduced growing media on the growth and yield of tomatoes and carrots, with the aim to develop sustainable alternatives to traditional peat-based substrates in horticulture. Thirty different growing media mixtures were tested, incorporating materials such as wood fiber, compost, biochar, bio-ash, and struvite, with the goal of identifying viable alternatives to peat. The experiments were conducted in greenhouse conditions, and the performance of these mixtures was assessed based on yield and overall vitality of tomato and carrot plants. The results revealed that fully peat-free mixtures generally underperformed compared to peat-based references. However, some peat-reduced mixtures with 30% peat in combination with wood fiber, compost, struvite or bio-ash demonstrated promising results. Bio-ash and struvite were evaluated as phosphorus sources, with findings suggesting that both materials can enhance substrate fertility when combined with appropriate nitrogen fertilizers. The effect of biochar was not very pronounced in general. Moreover, the addition of biochar was associated with a disappearance of plant-available nitrogen from the growing media, which likely contributed to its limited effectiveness in improving crop performance. The study underscores the continual challenge of completely phasing out peat in growing media for horticulture but highlights the potential of reducing it greatly and integrating more sustainable materials such as wood fiber and recycled materials such as compost, bio-ash and struvite. The results suggest that with further refinement, specific combinations of these materials could be developed into optimized substrate mixtures for sustainable horticultural practices without compromising productivity.
Abstract
No abstract has been registered
Abstract
In Norway, red and white clover dominate as forage legumes, but lucerne and bird’s foot trefoil are gaining interest for their high nutritive value. This study aimed to quantify the effects of various forage legumes in mixtures with timothy on dry matter yield (DMY), nitrogen (N) fixation, and yield of extractable crude protein (CP) via a green biorefinery process. A field experiment was established in 2023 at NIBIO Tuv, Steinkjer (63.9°N, 11.4°E) using timothy pure stands and six timothy-based mixtures incorporating red clover, white clover, blue lucerne, yellow lucerne, and bird’s-foot trefoil. The forages were harvested three times in 2024. The DMY and forage quality were measured, and N-fixation was calculated. Extractable CP from press juice of forage samples was measured. Although lucerne varieties initially established well, unfavourable winter conditions substantially reduced the number of lucerne plants. Clover containing mixtures achieved the highest DMY, averaging 12.8 Mg/ha and fixed up to 213 kg N/ha, about 3.6 times more than bird’s foot trefoil. Red clover mixture resulted in the highest CP yield at first cut. These findings underscore the effectiveness of clover-based mixtures in enhancing forage production and protein extraction both in organic and conventional farming.
Authors
Eva BrodAbstract
No abstract has been registered
Authors
Michel VerheulAbstract
No abstract has been registered
Authors
Tomasz Leszek WoznickiAbstract
No abstract has been registered
Authors
Jørgen A.B. MølmannAbstract
Orientering om kontrollerte forsøk med kålrot og klimafaktorers påvirkning på spisekvalitet
Authors
Michel VerheulAbstract
No abstract has been registered
Authors
Divina Gracia P. RodriguezAbstract
Presentasjonen viser hvordan urinresirkulering kan bidra til å løse både miljø- og matvaresikkerhetsutfordringer. Den tar utgangspunkt i nitrogen- og fosforforurensning i Oslofjorden og viser hvordan næringsstoffer fra urin kan gjenvinnes som trygg gjødsel. Eksempler fra Etiopia og Europa illustrerer teknologiske løsninger, økonomiske og kulturelle barrierer, samt behovet for politikk, sertifisering og partnerskap for å muliggjøre en sirkulær næringsstofføkonomi.
Authors
Tomasz Leszek WoznickiAbstract
Foredrag, Harbin, Kina