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@ARTICLE{Pfab:18210,
      author       = {Pfab, H. and Palmer, I. and Buegger, F. and Fiedler, S. and
                      Müller, T. and Ruser, R.},
      title        = {{N}2{O} fluxes from a {H}aplic {L}uvisol under intensive
                      production of lettuce and cauliflower as affected by
                      different {N}-fertilization strategies},
      journal      = {Journal of plant nutrition and soil science},
      volume       = {174},
      issn         = {1436-8730},
      address      = {Weinheim},
      publisher    = {Wiley-VCH},
      reportid     = {PreJuSER-18210},
      pages        = {545 - 553},
      year         = {2011},
      note         = {This study was financed by the Deutsche Bundesstiftung
                      Umwelt (AZ 25420). We further thank Heidi Zimmermann,
                      Hinrich Bremer, Maria Ruckwied, and the laboratory staff of
                      the Department of Plant Nutrition. We also thank
                      University's workshop for technical assistance, as well as
                      Hans Bucher, Rudolf Schulz, Christa Schollhammer, Tobias
                      Hartmann, our student assistants and the crew of the
                      experimental farm "Heidfeldhof" for their help.},
      abstract     = {Vegetable-production systems often show high soil mineral-N
                      contents and, thus, are potential sources for the release of
                      the climate-relevant trace gas N2O from soils. Despite
                      numerous investigations on N2O fluxes, information on the
                      impact of vegetable-production systems on N2O emissions in
                      regions with winter frost is still rare. This present study
                      aimed at measuring the annual N2O emissions and the total
                      yield of a lettuce-cauliflower rotation at different
                      fertilization rates on a Haplic Luvisol in a region exposed
                      to winter frost (S Germany). We measured N2O emissions from
                      plots fertilized with 0, 319, 401, and 528 kg N ha(-1)
                      (where the latter three amounts represented a strongly
                      reduced N-fertilization strategy, a target value system
                      [TVS] in Germany, and the N amount fertilized under good
                      agricultural practices). The N2O release from the treatments
                      was 2.3, 5.7, 8.8, and 10.6 kg N2O-N ha(-1) y(-1),
                      respectively. The corresponding emission factors calculated
                      on the basis of the total N input ranged between $1.3\%$ and
                      $1.6\%.$ Winter emission accounted for $45\%$ of the annual
                      emissions, and a major part occurred after the incorporation
                      of cauliflower residues. The annual N2O emission was
                      positively correlated with the nitrate content of the top
                      soil (0-25 cm) and with the N surpluses of the N balance.
                      Reducing the amount of N fertilizer applied significantly
                      reduced N2O fluxes. Since there was no significant effect on
                      yields if fertilization was reduced from 528 kg N ha(-1)
                      according to "good agricultural practice" to 401 kg N ha(-1)
                      determined by the TVS, we recommend this optimized
                      fertilization strategy.},
      keywords     = {J (WoSType)},
      cin          = {IBG-3},
      ddc          = {570},
      cid          = {I:(DE-Juel1)IBG-3-20101118},
      pnm          = {Terrestrische Umwelt},
      pid          = {G:(DE-Juel1)FUEK407},
      shelfmark    = {Agronomy / Plant Sciences / Soil Science},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000294665300004},
      doi          = {10.1002/jpln.201000123},
      url          = {https://juser.fz-juelich.de/record/18210},
}