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@ARTICLE{Wu:889051,
      author       = {Wu, Di and Zhang, Yuxue and Dong, Gao and Du, Zhangliu and
                      Wu, Wenliang and Chadwick, David and Bol, Roland},
      title        = {{T}he importance of ammonia volatilisation in estimating
                      the efficacy of nitrification inhibitors to reduce {N}2{O}
                      emissions: a global meta-analysis},
      journal      = {Environmental pollution},
      volume       = {271},
      issn         = {0269-7491},
      address      = {Amsterdam [u.a.]},
      publisher    = {Elsevier Science},
      reportid     = {FZJ-2020-05419},
      pages        = {116365},
      year         = {2021},
      abstract     = {Nitrification inhibitors (NIs) have been shown to be an
                      effective tool to mitigate direct N2O emissions from soils.
                      However, emerging findings suggest that NIs may increase
                      soil ammonia (NH3) volatilization and, subsequently,
                      indirect N2O emission. A quantitative synthesis is lacking
                      to evaluate how NIs may affect NH3 volatilization and the
                      overall N2O emissions under different environmental
                      conditions. In this meta-analysis, we quantified the
                      responses of NH3 volatilization to NI application with 234
                      observations from 89 individual studies and analysed the
                      role of experimental method, soil properties, fertilizer/NI
                      type, fertilizer application rate and land use type as
                      explanatory factors. Furthermore, using data sets where soil
                      NH3 emission and N2O emission were measured simultaneously,
                      we re-evaluated the effect of NI on overall N2O emissions
                      including indirect N2O emission from NH3 volatilization. We
                      found that, on average, NIs increased NH3 volatilization by
                      $35.7\%$ $(95\%$ CI: $25.7–46.7\%)$ and increased indirect
                      N2O emission from NH3 emission (and subsequent N deposition)
                      by $2.9\%–15.2\%.$ Responses of NH3 volatilization mainly
                      varied with experimental method, soil pH, NI type and
                      fertilizer type. The increase of NH3 volatilization
                      following NI application showed a positive correlation with
                      soil pH (R2 = 0.04, n = 234, P < 0.05) and N fertilizer rate
                      (R2 = 0.04, n = 187, P < 0.05). When the indirect N2O
                      emission was considered, NI’s N2O mitigation effect
                      decreased from $48.0\%$ to $39.7\%$ (EF = $1\%),$ or
                      $28.2\%$ (EF = $5\%).$ The results indicate that using DMPP
                      with ammonium-based fertilizer in low pH, high SOC soils
                      would have a lower risk for increasing NH3 volatilization
                      than using DCD and nitrapyrin with urea in high pH, lower
                      SOC soil. Furthermore, reducing N application rate may help
                      to improve NIs’ overall N2O emission mitigation efficiency
                      and minimize their impact on NH3 volatilization.},
      cin          = {IBG-3},
      ddc          = {690},
      cid          = {I:(DE-Juel1)IBG-3-20101118},
      pnm          = {2173 - Agro-biogeosystems: controls, feedbacks and impact
                      (POF4-217)},
      pid          = {G:(DE-HGF)POF4-2173},
      typ          = {PUB:(DE-HGF)16},
      pubmed       = {33388681},
      UT           = {WOS:000614114100072},
      doi          = {10.1016/j.envpol.2020.116365},
      url          = {https://juser.fz-juelich.de/record/889051},
}