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@ARTICLE{Senbayram:887707,
      author       = {Senbayram, Mehmet and Well, Reinhard and Shan, Jun and Bol,
                      Roland and Burkart, Stefan and Jones, David L. and Wu, Di},
      title        = {{R}hizosphere processes in nitrate-rich barley soil tripled
                      both {N}2{O} and {N}2 losses due to enhanced bacterial and
                      fungal denitrification},
      journal      = {Plant and soil},
      volume       = {448},
      number       = {1-2},
      issn         = {1573-5036},
      address      = {Dordrecht [u.a.]},
      publisher    = {Springer Science + Business Media B.V},
      reportid     = {FZJ-2020-04364},
      pages        = {509 - 522},
      year         = {2020},
      abstract     = {Background and aimsPlants can directly affect nitrogen (N)
                      transformation processes at the micro-ecological scale when
                      soil comes into contact with roots. Due to the
                      methodological limitations in measuring direct N2 losses in
                      plant-soil systems, however, the effect of rhizosphere
                      processes on N2O production and reduction to N2 has rarely
                      been quantified.MethodsFor the first time, we developed a
                      robotic continuous flow plant-soil incubation system (using
                      a He+O2 + CO2) combined with N2O 15N site preference
                      approach to examine the effect of plant root activity
                      (barley – Hordeum vulgare L.) on: i) soil-borne N2O and N2
                      emissions, ii) the specific contribution of different
                      pathways to N2O fluxes in moist soils $(85\%$ water holding
                      capacity) receiving different inorganic N forms.ResultsOur
                      results showed that when a nitrate-based N fertiliser was
                      applied, the presence of plants tripled both N2O and N2
                      losses during the growth period but did not alter the
                      N2O/(N2O + N2) product ratio. The 15N site preference
                      data indicated that bacterial denitrification was the
                      dominant source contributing to the observed N2O fluxes in
                      both nitrate and ammonium treated soils, whereas the
                      presence of barley increased the contribution of fungal N2O
                      in the nitrate treated soils. During the post-harvest
                      period, N2O and N2 emissions significantly increased in the
                      ammonium-fertilised treatment, being more pronounced in the
                      soil with a senescing root system.ConclusionOverall, our
                      study showed a significant interaction between rhizosphere
                      processes and N forms on the magnitude, patterns, and
                      sources of soil borne N2O and N2 emissions in moist
                      agricultural soils.},
      cin          = {IBG-3},
      ddc          = {580},
      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:000516246500001},
      doi          = {10.1007/s11104-020-04457-9},
      url          = {https://juser.fz-juelich.de/record/887707},
}