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
Authors
Trygve S. Aamlid Ellen Johanne Svalheim Eveliina Kallioniemi Hans Martin Hanslin Håkon Borch Knut Anders HovstadAbstract
No abstract has been registered
Authors
Wiktoria Kaczmarek-Derda Marit Helgheim Jan Netland Hugh Riley Kjell Wærnhus Samson Øpstad Liv Østrem Lars Olav BrandsæterAbstract
The abundance of Juncus effusus (soft rush) and Juncus conglomeratus (compact rush) has increased in coastal grasslands in Norway over recent decades, and their spread has coincided with increased precipitation in the region. Especially in water‐saturated, peaty soils, it appears from field observations that productive grasses cannot compete effectively with such rapidly growing rush plants. In autumn–winters of 2012–2013 and 2013–2014, a four‐factor, randomised block greenhouse experiment was performed to investigate the effect of different soil moisture regimes and organic matter contents on competition between these rush species and smooth meadow‐grass (Poa pratensis). The rush species were grown in monoculture and in competition with the meadow‐grass, using the equivalent of full and half the recommended seed rate for the latter. After about three months, above‐ and below‐ground dry matter was measured. J. effusus had more vigorous growth, producing on average 23–40% greater biomass in both fractions than J. conglomeratus. The competitive ability of both rush species declined with decreasing soil moisture; at the lowest levels of soil moisture, growth reductions were up to 93% in J. conglomeratus and 74% in J. effusus. Increasing water level in peat–sand mixture decreased competivitiveness of meadow‐grass, while pure peat, when moist, completely impeded its below‐ground development. These results show that control of rush plants through management may only be achieved if basic soil limitations have been resolved.
Abstract
No abstract has been registered
Abstract
No abstract has been registered
Abstract
No abstract has been registered
Abstract
No abstract has been registered
Authors
Trine Eggen Heidi Amlund Aksel Bernhoft Ole Martin Eklo Gunnar Sundstøl Eriksen Belinda Eline Flem Torsten Källqvist Bal Ram Singh Eiliv Steinnes Stefan Trapp Anne Falk Øgaard Christiane Kruse Fæste Erik-Jan Lock Live Lingaas Nesse Einar Ringø Håvard Steinshamn Robin Ørnsrud Åshild KrogdahlAbstract
No abstract has been registered
2018
Authors
Inger Martinussen Tomasz Leszek Woznicki Unni Myrheim Roos Anita Sønsteby Eivind Uleberg Anne Linn HykkerudAbstract
No abstract has been registered
Authors
Inger Martinussen Tomasz Leszek Woznicki Unni Myrheim Roos Anita Sønsteby Eivind Uleberg Anne Linn HykkerudAbstract
No abstract has been registered
Authors
Anne Linn Hykkerud Eivind Uleberg Espen Hansen Marieke Vervoort Jørgen A.B. Mølmann Inger MartinussenAbstract
Cloudberry (Rubus chamaemorus L.) is a wild perennial shrub growing on peatland with a circumpolar distribution. The combined berries have a high polyphenol content comprised primarily of ellagitannins. A few commercial cultivars are available, and pre-breeding trials on clonal material from different geographical origins are in progress. The objective of this study was to investigate how the content of polyphenols of four different cloudberry cultivars were affected by harvesting time and climatic variations during a 3-year-period. Plants were grown outside in plots and berries were harvested when mature. Berries were analyzed for total polyphenols and total anthocyanins by spectrophotometer. Total ellagic acid was identified and quantified using HPLC-MS after hydrolysis of the extracts. Results showed that all measured parameters; total anthocyanins, total polyphenols and ellagic acid are strongly influenced by the genetic background. Although low anthocyanin contents were present in all genotypes, they were highly affected by climatic conditions, being highest at low temperatures. However, the content of ellagic acid was less affected by environmental conditions and showed little response to changing temperatures. In conclusion, ellagitannin content was the most dominating polyphenol group observed in this study and was affected by genetics and is therefore a good breeding criterion for increased health benefit of cloudberry.