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@ARTICLE{Roscher:10920,
      author       = {Roscher, C. and Thein, S. and Weigelt, A. and Temperton,
                      V.M. and Buchmann, N. and Schulze, E.-D.},
      title        = {{N}2 fixation and performance of 12 legume species in a
                      6-year grassland biodiversity experiment},
      journal      = {Plant and soil},
      volume       = {341},
      issn         = {0032-079X},
      address      = {Dordrecht [u.a.]},
      publisher    = {Springer Science + Business Media B.V},
      reportid     = {PreJuSER-10920},
      year         = {2011},
      note         = {The Jena Experiment is funded by the German Science
                      Foundation (FOR 456) with support by the University of Jena
                      and the Max Planck Institute for Biogeochemistry and is
                      coordinated by W. W. Weisser. We thank U. Gerighausen, U.
                      Wehmeier and S. Hengelhaupt for technical assistance and all
                      of the people who assisted in maintaining the experiment and
                      harvesting biomass. We acknowledge H. Geilmann, I. Hilke and
                      M. Rassler for stable isotope and elemental analyses.},
      abstract     = {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.},
      keywords     = {J (WoSType)},
      cin          = {IBG-2},
      ddc          = {570},
      cid          = {I:(DE-Juel1)IBG-2-20101118},
      pnm          = {Terrestrische Umwelt},
      pid          = {G:(DE-Juel1)FUEK407},
      shelfmark    = {Agronomy / Plant Sciences / Soil Science},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000288455300026},
      doi          = {10.1007/s11104-010-0647-0},
      url          = {https://juser.fz-juelich.de/record/10920},
}