de.mpg.escidoc.pubman.appbase.FacesBean
Deutsch
 
Hilfe Wegweiser Impressum Kontakt Einloggen
  DetailsucheBrowse

Datensatz

DATENSATZ AKTIONENEXPORT

Freigegeben

Zeitschriftenartikel

N2 fixation and performance of 12 legume species in a 6-year grassland biodiversity experiment

MPG-Autoren
http://pubman.mpdl.mpg.de/cone/persons/resource/persons62531

Roscher,  C.
Emeritus Group, Prof. E.-D. Schulze, Max Planck Institute for Biogeochemistry, Max Planck Society;

http://pubman.mpdl.mpg.de/cone/persons/resource/persons62549

Schulze,  E. D.
Emeritus Group, Prof. E.-D. Schulze, Max Planck Institute for Biogeochemistry, Max Planck Society;

Externe Ressourcen
Es sind keine Externen Ressourcen verfügbar
Volltexte (frei zugänglich)
Es sind keine frei zugänglichen Volltexte verfügbar
Ergänzendes Material (frei zugänglich)
Es sind keine frei zugänglichen Ergänzenden Materialien verfügbar
Zitation

Roscher, C., Thein, S., Weigelt, A., Temperton, V. M., Buchmann, N., & Schulze, E. D. (2011). N2 fixation and performance of 12 legume species in a 6-year grassland biodiversity experiment. Plant and Soil, 341(1-2), 333-348. doi:10.1007/s11104-010-0647-0.


Zitierlink: http://hdl.handle.net/11858/00-001M-0000-000E-DC8C-6
Zusammenfassung
Highly variable effects of legumes have been observed in biodiversity experiments, but little is known about plant diversity effects on N-2 fixation of legume species. We used the N-15 natural abundance method in a non-fertilized regularly mown 6-year biodiversity experiment (Jena Experiment) to quantify N-2 fixation of 12 legume species. The proportion of legume N derived from the atmosphere (%N-dfa) differed significantly among legume species. %N-dfa values were lower in 2004 after setting-up the experiment (73 +/- 20) than in the later years (2006: 80 +/- 16; 2008: 78 +/- 12). Increasing species richness had positive effects on %N-dfa in 2004 and 2006, but not in 2008. High biomass production of legumes in 2004 and 2006 declined to lower levels in 2008. In 2006, legume positioning within the canopy best explained variation in %N-dfa values indicating a lower reliance of tall legumes on N-2 fixation. In 2008, larger %N-dfa values of legumes were related to lower leaf P concentrations suggesting that the availability of phosphorus limited growth of legumes. In summary, diversity effects on N-2 fixation depend on legume species identity, their ability to compete for soil nutrients and light and may vary temporally in response to changing resource availability.