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.
2015
Authors
Erik Lysøe Rasmus J. N. Frandsen Hege Divon Valeria Terzi Luigi Orrù Antonella Lamontanara Anna-Karin Kolseth Kristian F. Nielsen Ulf ThraneAbstract
No abstract has been registered
Authors
Theo RuissenAbstract
No abstract has been registered
Authors
Christian Guido Bruckner Svenja Heesch Maria Larsen Seivåg Johan Johansen Åsbjørn KarlsenAbstract
No abstract has been registered
Authors
Ylva-li Britta BlanckAbstract
No abstract has been registered
Authors
Erling MeisingsetAbstract
No abstract has been registered
Authors
Aaron SmithAbstract
No abstract has been registered
Authors
Helena Aronsson Björn Ringselle Lars Andersson Göran BergkvistAbstract
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.
Authors
Björn Ringselle Göran Bergkvist Helena Aronsson Lars AnderssonAbstract
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.
Authors
Helen Higgs Gudbrand Lien Andrew C. WorthingtonAbstract
No abstract has been registered
Authors
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 AssengAbstract
No abstract has been registered