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.
2016
Authors
Guro Brodal Jan Netland Elin Thingnæs Lid Åshild Ergon Christer Magnusson Arild Sletten Leif Sundheim May Sæthre Anne Marte Tronsmo Bjørn Økland Trond RafossAbstract
No abstract has been registered
Authors
Trine EggenAbstract
No abstract has been registered
Authors
Torsten Källqvist Hubert Dirven Tor Gjøen Arne Tronsmo Siamak Pour Yazdankhah Edgar Rivedal Katrine Borgå Ole Martin Eklo Merete Grung Jan Ludvig Lyche Marit Låg Asbjørn Magne Nilsen Line Emilie SverdrupAbstract
No abstract has been registered
Authors
Torsten Källqvist Hubert Dirven Tor Gjøen Arne Tronsmo Siamak Pour Yazdankhah Edgar Rivedal Katrine Borgå Ole Martin Eklo Merete Grung Jan Ludvig Lyche Marit Låg Asbjørn Magne Nilsen Line Emilie SverdrupAbstract
No abstract has been registered
Authors
Eva Skarbøvik Ian Allan Per Stålnacke Tore Høgåsen Inga Greipsland John Rune Selvik Liv Bente Skancke Stein BeldringAbstract
Riverine inputs and direct discharges to Norwegian coastal waters in 2015 have been estimated in accordance with the OSPAR Commission’s principles. Nutrients, metals and organic pollutants have been monitored in rivers; discharges from point sources have been estimated from industry, sewage treatment plants and fish farming; and nutrient inputs from diffuse sources have been modelled. Trends in riverine inputs have been analyzed, and threshold concentration levels investigated.
Abstract
No abstract has been registered
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No abstract has been registered
Abstract
The use of seaweeds in animal diets is not new. However, little is known about the feed value of seaweed, both in terms of chemical composition and protein digestibility, and regarding variation between species and season. In this study, eight seaweed species of the genus Acrosiphonia, Alaria, Laminaria, Mastocarpus, Palmaria, Pelvetia, Porphyra, and Ulva were sampled in spring (March) and autumn (October and November) 2014 at the coast of Bodø in Northern Norway, and were analysed for chemical composition, in situ rumen degradability and total tract crude protein (CP) digestibility. Ash content in dry matter (DM) was generally high (overall mean 190 g/kg in DM) and varied considerably, between species (P < 0.01) and between seasons (P = 0.02). CP concentration in DM varied both between species (P < 0.0001) and seasons (P < 0.01). Highest CP in DM was found for Porphyra (350 g/kg DM) and lowest for Pelvetia (90 g/kg DM). Spring samples were higher in CP than autumn samples. The effective degradability estimated at 5% rumen passage rate (ED5) of CP varied between species (P < 0.0001) but not between seasons (P = 0.10). The highest ED5 of CP was found for Alaria (550 g/kg CP) and lowest for Ulva (240 g/kg CP). Digestible rumen escape protein (DEP) varied significantly between species (P < 0.0001) but not between seasons (P = 0.06); highest DEP was found for Ulva (530 g/kg CP) and Porphyra (500 g/kg CP). Based on our results, Acrosiphonia, Alaria, Laminaria, Mastocarpus and Palmaria can supply the rumen with high amounts of rumen degradable protein, while Porphyra and Ulva can be used as a source of digestible bypass protein. Pelvetia had a very low degradability and should not be used to feed dairy cows.
Authors
E.J. Cottier-Cook N. Nagabhatla Y. Badis M. Campbell Thierry Chopin W. Dai J. Fang P. He C. Hewitt G.H. Kim Y. Huo Z. Jiang G. Kema X. Li F. Liu H. Liu Y. Liu Q. Lu Q. Luo Y. Mao F.E. Msuya Celine Rebours H. Shen GD Stentiford C. Yarish H. Wu X. Yang J. Zhang Y. Zhou Claire M. M. GachonAbstract
No abstract has been registered
Abstract
Top dieback of Norway spruce (Picea abies), triggered by drought in 2004–2006, has been observed in Southeast Norway and trees died within four years after appearance of the first symptoms. The aim of our study was to use sap flux measurements as a diagnostic method for assessment of tree vitality. We used the heat field deformation method to monitor the sap flux density (SFD) in four pairs of healthy and declining trees in situ. To provide retrospective information on hydraulic performance of the trees we took samples for wood anatomical analysis. After felling the trees we used the modified differential translucence method (MDT) as a proxy for the SFD measurements. Healthy trees had three times higher SFD values as declining trees. In some healthy trees we detected decreasing SFD with time. The MDT method agreed with the SFD measurements. In conclusion, we detected sap flux dysfunction in declining trees and showed that the SFD reduction may occur during a short period, prior to occurrence of any visual symptoms. We suggest incorporating the SFD measurements into the repertoire of diagnostic tools in forest pathology.