Huguenin-Elie, Olivier; Nyfeler, Daniel; Suter, Matthias; Frossard, Emmanuel and Lüscher, Andreas (2009) Positive Mischungseffekte auf Ertrag und Stickstoffversorgung in Klee-Gras-Mischungen. Paper at: 10. Wissenschaftstagung Ökologischer Landbau, Zürich, 11.-13. Februar 2009.
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Summary
High plant species richness has been shown to positively influence grassland biomass
production. In mixtures containing two forage grass and two forage legume species
we quantified the diversity-productivity effect and the nitrogen economy of the swards
across a broad range of species proportions. Positive diversity-productivity effects
resulted in higher yield (up to +35%) of the four-species grass-clover-mixtures than the
highest yielding monoculture (transgressive overyielding). The diversity-productivity
effect depended on the species proportion in the mixture and was maximal in well
balanced mixtures with a clover proportion of 40 – 60%. Transgressive overyielding
was significant over a fairly wide range of clover proportions. Well balanced grassclover-
mixtures allowed obtaining up to 320 kg N ha-1 yr-1 deriving from symbiotic N2
fixation and allowed an optimal transformation of fixed N into dry matter yield. These
mixtures allowed benefiting from maximal fixation activity of the legumes without
reducing the uptake of N from soil and fertiliser by the grasses in the sward.
EPrint Type: | Conference paper, poster, etc. |
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Type of presentation: | Paper |
Keywords: | Klee-Gras-Mischungen, overyielding, Kleeanteil, Stickstofffixierung |
Subjects: | Crop husbandry > Production systems > Pasture and forage crops |
Research affiliation: | International Conferences > 2009: Scientific Conference on Organic Agriculture > Pflanze und Boden > Grünland |
Related Links: | http://www.wissenschaftstagung.de/, http://www.verlag-koester.de/buch.php?id=645&start=0&fb_id=37 |
Deposited By: | Huguenin-Elie, Dr Olivier |
ID Code: | 14416 |
Deposited On: | 14 Apr 2009 |
Last Modified: | 12 Apr 2010 07:38 |
Document Language: | German/Deutsch |
Status: | Published |
Refereed: | Peer-reviewed and accepted |
Additional Publishing Information: | Dieser Beitrag ist im Tagungsband der 10. Wissenschaftagung erschienen: Mayer, J.; Alföldi, T.; Leiber, F.; Dubois, D.; Fried, P.; Heckendorn, F.; Hillmann, E.; Klocke, P.; Lüscher, A.; Riedel, S.; Stolze, M.; Strasser, F.; van der Heijden, M. and Willer, H., (Hrsg.) (2009) Werte – Wege – Wirkungen: Biolandbau im Spannungsfeld zwischen Ernährungssicherung, Markt und Klimawandel. Beiträge zur 10. Wissenschaftstagung Ökologischer Landbau, Zürich, 11.-13. Februar 2009. Band 1: Boden, Pflanzenbau, Agrartechnik, Umwelt- und Naturschutz, Biolandbau international, Wissensmanagement Band 2: Tierhaltung, Agrarpolitik und Betriebswirtschaft, Märkte und Lebensmittel. Verlag Dr. Köster, Berlin. Der Tagungsband kann beim Verlag Dr. Köster bezogen werden; siehe http://www.verlag-koester.de/buch.php?id=645&start=0&fb_id=37 |
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