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.
2015
Forfattere
Theo RuissenSammendrag
Det er ikke registrert sammendrag
Sammendrag
Graue Energie bezeichnet die Energiemenge, die nötig ist, um Produkte herzustellen und zu transportieren. Die Menge der Grauen Energie in Kuhställen trägt in Dänemark mit etwa 10 % zum gesamten Energiebedarf in der Milchviehproduktion bei (Dalgaard et al. 2000), in der Schweiz mit 32 % (Rossier und Gaillard 2004). Wir stellen hier eine Methode vor, um die Graue Energie (embodied energy) in der Gebäudehülle in landwirtschaftlichen Gebäuden vereinfacht zu berechnen. Unsere Ergebnisse zeigen, dass die Graue Energie pro Stallplatz in der Milchkuhhaltung sehr variiert und wesentlich von Grundfläche, Wandfläche und den verwendeten Materialien abhängt.
Forfattere
Christian Guido Bruckner Svenja Heesch Maria Larsen Seivåg Johan Johansen Åsbjørn KarlsenSammendrag
Det er ikke registrert sammendrag
Forfattere
Ylva-li Britta BlanckSammendrag
Det er ikke registrert sammendrag
Forfattere
Erling MeisingsetSammendrag
Det er ikke registrert sammendrag
Forfattere
Aaron SmithSammendrag
Det er ikke registrert sammendrag
Forfattere
Helena Aronsson Björn Ringselle Lars Andersson Göran BergkvistSammendrag
Methods for control of couch grass (Elymus repens L.) with reduced tillage and cover crops to achieve low risk of nitrogen (N) and phosphorus (P) leaching were investigated. Treatments with reduced post-harvest tillage (one or two passes with duckfoot cultivator), hoeing between rows in combination with a cover crop, and a cover crop mown twice during autumn were compared with treatments with conventional disc cultivation and the control without tillage or cover crop. The study was conducted on a sandy soil in Sweden with measurements of N and P leaching. A 2-year experimental protocol was used, repeated twice. Treatments were implemented in the first year, and effects on couch grass (shoot density, shoot and rhizome biomass) were measured during autumn and in the second year. Significant effects of a single duckfoot cultivation and cover crop strategies were observed on couch grass shoot density in autumn but persistent effects were not verified. In conclusion, a single cultivation after harvest instead of repeated reduced the risk of N leaching and a cover crop in combination with hoeing or mowing effectively reduced it. Repeated cultivations resulted in mean annual N leaching of 26 kg N ha−1 compared with 20 kg in the treatment with one cultivation, 17 kg in the control, 16 and 12 kg in cover crop treatments with mowing and hoeing, respectively. The P leaching was small (0.04–0.09 P ha−1 year−1), but there were indications of increased P drainage water concentrations in the treatment with a cover crop which was mown.
Forfattere
Björn Ringselle Göran Bergkvist Helena Aronsson Lars AnderssonSammendrag
Two potential control methods for Elymus repens, which do not disturb the soil, are post-harvest mowing and competition from under-sown cover crops. Our aim was to quantify the effect of cover crop competition and mowing on E. repens and to evaluate the potential for combining the two methods. We present a two-factorial split-plot experiment conducted at three locations in Sweden, in two experimental rounds conducted in 2011–2012 and 2012–2013. A spring cereal crop was under-sown with perennial ryegrass, red clover or a mixture of the two (subplots). Under-sown crops were either not mowed, or mowed once or twice post-harvest (main plots). This was followed by ploughing and a new spring cereal crop the next year. Mowing twice reduced autumn shoot biomass by up to 66% for E. repens and 50% for cover crops compared with the control, twice as much as mowing once. Pure ryegrass and mixture treatments reduced E. repens shoot biomass by up to 40% compared with the control. Mowing twice reduced rhizome biomass in the subsequent year by 35% compared with the control, while the pure red clover treatment increased it by 20–30%. Mowing twice and treatments including red clover resulted in higher subsequent grain yields. We concluded that repeated mowing has the potential to control E. repens, but a low-yielding cover crop has insufficient effect on rhizome biomass. Clover–grass mixtures are of interest as cover crops, because they have the potential to increase subsequent crop yield and even at low levels they reduce E. repens above-ground autumn growth.
Forfattere
Helen Higgs Gudbrand Lien Andrew C. WorthingtonSammendrag
Det er ikke registrert sammendrag
Forfattere
Frank Ewert Reimund P. Rötter Marco Bindi Heidi A. Webber Miroslav Trnka Kurt Christian Kersebaum Jørgen E. Olesen Martin K. van Ittersum Sander J.C. Janssen Mike Rivington Mikhail A. Semenov Daniel Wallach John R. Porter Derek Stewart Jan M.F. Verhagen Thomas Gaiser Taru Palosuo Fulu Tao Claas Nendel Pier Paolo Roggero Lenka Bartošová Senthold AssengSammendrag
Det er ikke registrert sammendrag