Publikasjoner
NIBIOs ansatte publiserer flere hundre vitenskapelige artikler og forskningsrapporter hvert år. Her finner du referanser og lenker til publikasjoner og andre forsknings- og formidlingsaktiviteter. Samlingen oppdateres løpende med både nytt og historisk materiale. For mer informasjon om NIBIOs publikasjoner, besøk NIBIOs bibliotek.
2016
Sammendrag
The growing season is longer than earlier and especially autumn temperatures have increased during the last 30 years (Hanssen‐Bauer et al 2015). A longer growing season increases the potential for forage production as an earlier spring, and warmer autumn implies that farmers can take more cuts with larger yields than earlier. Nevertheless, a warmer autumn can promote considerable regrowth after the last cut, and farmers report that they are uncertain if this regrowth should be harvested. The cost of harvesting forage is high, and feed quality of late harvested forage may be sub‐optimal. Changing precipitation patterns where there may be more episodes of heavy rains during autumn, late harvesting of grass swards can increase the risk of soil compaction and damage plant cover. This was the background to a study where we examine how different harvest time in autumn affects overwintering and yields the following year. We have established randomized block field experiments with 3 replicates in established leys dominated by timothy (Phleum pratense L.) at two sites in Norway in 2015; Kvithamar 63o29’N, 10o53’E, and Holt 69o38’N, 18o57’E. In the Kvithamar field, the main harvests were made June 30 and August 10. Thereafter, in one treatment, plots were left unharvested till next spring, while in other treatments plots were cut 4, 6, 8 or 10 weeks after the second main harvest. At Holt, the first harvest was made July 7, and the second harvest either August 11 or August 27. The regrowth after these treatments were either left uncut or harvested 4, 6 or 8 weeks after the last main cut in August 10, or 6 weeks after the cut in August 28. Dry matter yields were measured from all cuts. The results were analysed using ANOVA with MiniTab. No significant differences in yields were found between the different cutting treatments at either site, even though temperatures were between 2.2‐ 2.5oC higher than normal (1961‐1990) in September and between 1.1‐1.6 warmer than normal in October. Global radiation decreases rapidly from September onwards, and is a limiting factor for the growth potential of timothy‐dominated leys. In spring, we will measure winter survival and growth rate and yields in all treatments. The results from these measurements will be presented at the conference.
Forfattere
Jørgen Todnem Tor LunnanSammendrag
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Forfattere
Frans-Jan W. Parmentier Daniel Rasse Georg Heinrich Hansen Jarle W. Bjerke Simon Weldon Magnus LundSammendrag
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Matthew Patterson Daniel Gimenez Attila Nemes Annette Dathe Helen French Esther Bloem Johannes Koestel Nicholas JarvisSammendrag
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Attila Nemes Matthew Patterson Annette Dathe Daniel Gimenez Johannes Koestel Mingming Qin Helen French Esther Bloem Perrine Fernandez Nicholas JarvisSammendrag
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Marcin Stróz ̇ecki Mateusz Samson Bogdan Chojnicki Jacek Leśny Christophe Moni Marek Urbaniak Janusz Olejnik Radoslaw Juszczak Hanna Marika SilvennoinenSammendrag
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Forfattere
Radoslaw Juszczak Bogdan Chojnicki Marek Urbaniak Jacek Leśny Hanna Marika Silvennoinen Mariusz Lamentowicz Anna Maria Basinska Maciej Gabka Marcin Stróz ̇ecki Mateusz Samson Dominika Łuców Damian Józefczyk Mathias Hoffmann Janusz OlejnikSammendrag
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Konferanseposter – Background soil phosphorus Levels in marine sediments in Norway
Marianne Bechmann
Forfattere
Marianne BechmannSammendrag
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