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.
2018
Abstract
This study addresses changes in visual appearance of unpainted wood materials exposed outdoors. Specimens of Norway spruce (Picea abies) Scots pine (Pinus sylvestris), aspen (Populus tremula), acetylated Radiata pine (Pinus radiata) and DMDHEU-modified Scots pine sapwood were exposed facing south in Ås, Norway for 60 weeks. During this period, surface mould growth development and wasp attack were assessed visually. Development in lightness (L*) and the uniformity of the weather grey colour were assessed by image analysis. The mould rating of the tested wood materials developed in varying speed, but all specimens had reached the maximum rating after 42 weeks. Our results indicate that most specimens continued to darken after the specimens had reached maximum mould rating, and that evaluation of L* can provide additional information about the surface mould growth. Furthermore, our results indicate that most materials developed a less uniform appearance than what was initially, except from DMDHEU which obtained a more uniform appearance as a consequence of the weathering. This study also shows that wasp attack can give a lighter appearance of the wood by chewing off the top weathered layer. Different wood substrates were attacked in varying degree. Aspen was the substrate most severely attacked by wasps while the acetylated wood was not attacked at all during the 60 weeks of exposure.
Abstract
No abstract has been registered
Authors
Haakon Helland A Leufvén Gunnar Bengtsson Hanne Larsen Elin Merete Nicolaisen Mette Thomsen Arne Hermansen Anne-Berit Wold Liv BergeAbstract
submittedVersion
Authors
Andrew D. Armitage Erik Lysøe Charlotte F. Nellist Laura A. Lewis Liliana M. Cano Richard J. Harrison May Bente BrurbergAbstract
No abstract has been registered
Authors
Astrid Johansen Anne Kjersti Bakken Anne Langerud Ragnhild Borchsenius Sverre Heggset Atle HaugnesAbstract
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No abstract has been registered
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No abstract has been registered
Authors
Åshild Taksdal Randby Elisabet Nadeau Linda Karlsson Erik Brodshaug Astrid JohansenAbstract
Total tract apparent digestibility of early dough and hard dough stage of maturity harvested Whole Crop Wheat by Dairy cows was examined in a latin square experimental design. The Whole Crop wheat was ensiled in big bales. The silage was either crushed or not crushed prior to feeding. The starch was completely harvested, regardless of stage of maturity or Processing.
Authors
Liv Østrem Torben Asp Marc Ghesquière Yoshinori Sanada Odd Arne RognliAbstract
Norwegian cultivars and breeding materials of perennial ryegrass and Festulolium were planted at three locations in Denmark, France and Japan for test-ing of resistance against leaf diseases. In general, all plant materials were susceptible to crown rust. The highest incidence of rust attack occurred at the French site, which due to its climatic conditions might be the most suitable testing site for future scoring of similar plant material. Entries based on introgressed genetic materials from UK were most resistant towards crown rust. Crown rust resistance needs increased focus as a breeding objective in the Nordic region due to climate changes, which will most likely lead to increased infection of leaf diseases.
Authors
David Kopecký Joost Baert Susanne Barth J Bartos Vladimir Cernoch J. Dolezel Dermot Grogan John Harper M. Humphreys T. Ksiazczyk Liv Østrem E. Paszkowski Dejan Sokolovič Zbigniew Zwierzykowski Marc GhesquièreAbstract
A comprehensive set of Festulolium cultivars from on-going field trials in the Eucarpia network was characterised at the chromosome level using genomic in situ hybridization (GISH) and by Diversity Array Technology (DArT) markers. Both technologies were found to be complementary in describing the breeding history of the plant material. The genomic composition of the Lolium X Festuca cultivars varied from those that comprised equivalent proportions of their parental genomes to introgression lines where small chromosome segments of Festuca had been translocated onto Lolium chromosomes. The breadth of genotype combinations found within the grass cultivars described represents an important resource of genetic variations necessary to combat the diverse abiotic stresses encountered within Europe, including safeguards against prolonged exposure to harsh weather conditions. It is likely that in future plant breeding, genotyping will contribute to precision-transfers of targeted Festuca genes into Lolium germplasm in order to enhance resilience to climate change.