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@ARTICLE{Wu:849682,
      author       = {Wu, Di and Senbayram, Mehmet and Zang, Huadong and Ugurlar,
                      Ferhat and Aydemir, Salih and Brüggemann, Nicolas and
                      Kuzyakov, Yakov and Bol, Roland and Blagodatskaya, Evgenia},
      title        = {{E}ffect of biochar origin and soil p{H} on greenhouse gas
                      emissions from sandy and clay soils},
      journal      = {Applied soil ecology},
      volume       = {129},
      issn         = {0929-1393},
      address      = {Amsterdam},
      publisher    = {Elsevier},
      reportid     = {FZJ-2018-03818},
      pages        = {121 - 127},
      year         = {2018},
      abstract     = {Emissions of greenhouse gases (GHGs), such as carbon
                      dioxide (CO2) and nitrous oxide (N2O) have great impact on
                      global warming and atmospheric chemistry. Biochar addition
                      is a potential option for reducing GHGs emissions through
                      carbon (C) sequestration and N2O mitigation. However, the
                      influences of biochar on C and nitrogen (N) transformations
                      in soil are still unclear, resulting in a poor understanding
                      of the mechanisms of N2O mitigation effects of biochar. Here
                      we carried out two soil incubation experiments to
                      investigate the influence of two common biochars addition
                      (corn cob and olive pulp) with ammonium sulfate on CO2 and
                      N2O emissions from two contrasting soil types (acidic sandy
                      and alkaline clay soil). Furthermore, four extracellular
                      enzymes activities that related to C and N cycling, i.e.
                      cellobiohydrolase, chitinase, xylanase and β-glucosidase,
                      were analyzed to gain insights into the underlying
                      mechanisms of biochar’s effects on CO2 and N2O evolutions.
                      Contrasting effects of two biochars on CO2 and N2O emissions
                      were observed in the two different soils. The corn biochar
                      addition had no significant effect on CO2 and N2O emissions
                      in the alkaline clay soil, but significantly decreased CO2
                      emissions by $11.8\%$ and N2O emissions by $26.9\%$ in the
                      acidic sandy soil compared to N-fertilizer only treatment.
                      In contrast, olive biochar addition showed no significant
                      effect on CO2 emissions but decreased N2O emissions by
                      $34.3\%$ in the alkaline clay soil, while in the acidic
                      sandy soil addition of olive biochar triggered about a
                      twofold higher maximum CO2 emission rate and decreased N2O
                      emissions by $68.4\%.$ Up to $50–130\%$ higher specific
                      CO2 emissions (per unit of C-related enzyme activity:
                      cellobiohydrolase, chitinases and β-glucosidase) were
                      observed after addition of olive biochar compared to corn
                      biochar addition in the acidic sandy soil. We concluded that
                      biochar’s effects on N2O and CO2 emissions are more
                      pronounced in acidic soils. Alkaline biochar’s N2O
                      mitigation potential in acidic soils seems to be dependent
                      on soil NO3− content as drastically higher N2O emissions
                      were measured in early phase of the experiment (where soil
                      NO3− was high) and significantly lower N2O fluxes were
                      obtained in later phases (with lower soil NO3− content).},
      cin          = {IBG-3},
      ddc          = {630},
      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:000436438700015},
      doi          = {10.1016/j.apsoil.2018.05.009},
      url          = {https://juser.fz-juelich.de/record/849682},
}