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@ARTICLE{Ciganda:864338,
      author       = {Ciganda, Verónica S. and López-Aizpún, María and
                      Repullo, Miguel A. and Wu, Di and Terra, José A. and
                      Elustondo, David and Clough, Tim and Cardenas, Laura M.},
      title        = {{S}oil nitrous oxide emissions from grassland: {P}otential
                      inhibitor effect of hippuric acid},
      journal      = {Journal of plant nutrition and soil science},
      volume       = {182},
      number       = {1},
      issn         = {1436-8730},
      address      = {Weinheim},
      publisher    = {Wiley-VCH},
      reportid     = {FZJ-2019-04134},
      pages        = {40 - 47},
      year         = {2019},
      abstract     = {In grassland systems, cattle and sheep urine patches are
                      recognized as nitrous oxide (N2O) emission hot spots due to
                      the high urinary nitrogen (N) concentrations. Hippuric acid
                      (HA) is one of the constituents of ruminant urine that has
                      been reported as a natural inhibitor of soil N2O emissions.
                      The aim of this study was to examine the potential for
                      elevated ruminant urine HA concentrations to reduce N2O
                      emissions, in situ, on an acidic heavy clay soil under
                      poorly drained conditions (WFPS > $85\%).$ A randomized
                      complete block design experiment with three replications and
                      four treatments was conducted using the
                      closed‐static‐flux chamber methodology. The four
                      treatments were applied inside the chambers: control with no
                      artificial urine application (C), control artificial urine
                      (U), and enriched artificial urine with two rates of HA
                      (55.8 and 90 mM, U+HA1, U+HA2). Soil inorganic‐N, soil
                      dissolved organic carbon (DOC), soil pH as well as N2O and
                      methane (CH4) fluxes were monitored over a 79‐d period.
                      Although N2O emissions were not affected by the HA enriched
                      urine treatments, U+HA2 positively affected the retention of
                      N as urn:x-wiley:14368730:media:jpln201700393-math-0001
                      until day 3, when the soil pH dropped to values < 5.
                      Subsequently, as a consequence of rainfall events and soil
                      acidification, it is likely that leaching or sorption onto
                      clay reduced the efficacy of HA, masking any treatment
                      differential effect on N2O emissions. Moreover, CH4 fluxes
                      as well as DOC results reflected the soil anaerobic
                      conditions which did not favour nitrification processes.
                      Further research is needed to determine the fate of HA into
                      the soil which might clarify the lack of an in situ effect
                      of this compound.},
      cin          = {IBG-3},
      ddc          = {640},
      cid          = {I:(DE-Juel1)IBG-3-20101118},
      pnm          = {255 - Terrestrial Systems: From Observation to Prediction
                      (POF3-255)},
      pid          = {G:(DE-HGF)POF3-255},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000458701100005},
      doi          = {10.1002/jpln.201700393},
      url          = {https://juser.fz-juelich.de/record/864338},
}