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@ARTICLE{Wu:864342,
      author       = {Wu, Lei and Zhang, Wenju and Wei, Wenjuan and He, Zhilong
                      and Kuzyakov, Yakov and Bol, Roland and Hu, Ronggui},
      title        = {{S}oil organic matter priming and carbon balance after
                      straw addition is regulated by long-term fertilization},
      journal      = {Soil biology $\&$ biochemistry},
      volume       = {135},
      issn         = {0038-0717},
      address      = {Amsterdam [u.a.]},
      publisher    = {Elsevier Science},
      reportid     = {FZJ-2019-04138},
      pages        = {383 - 391},
      year         = {2019},
      abstract     = {Straw incorporation is crucial to soil organic carbon (SOC)
                      sequestration, thus improving soil fertility and mitigating
                      climate change. The fate of straw C and the associated net
                      SOC balance remain largely unexplored, particularly in soils
                      subjected to long-term mineral and organic fertilization. To
                      address this, soil (δ13C: –19‰) that had been
                      continuously cropped with maize for 31 years and subjected
                      to five long-term fertilization regimes, including (i)
                      control (Unfertilized), (ii) mineral fertilizer (NPK)
                      application, (iii) $200\%$ NPK (2 × NPK) application,
                      (iv) manure (M) application, and (v) NPK plus manure (NPKM)
                      application, was incubated with or without addition of rice
                      straw (δ13C: –29‰) for 70 days. Straw addition largely
                      primed SOC mineralization. The priming effect (PE) was
                      considerably higher in 2 × NPK $(+122\%$ of CO2 from soil
                      without straw addition) but lower in M $(+43\%)$ relative to
                      the unfertilized soil $(+82\%),$ highlighting the importance
                      of fertilization in controlling PE intensity. Fertilization
                      increased the straw-derived microbial biomass C by
                      $90–577\%$ and straw-derived SOC by $34–68\%$ compared
                      to the unfertilized soil, primarily due to the increased
                      abundance of Gram-negative bacteria and cellobiohydrolase
                      activity. Straw-derived SOC was strongly positively
                      correlated with straw-derived microbial biomass C,
                      suggesting that dead microbial biomass (necromass) was a
                      dominant precursor of SOC formation. Consequently,
                      fertilization facilitated microbial utilization of straw C
                      and its retention in soil, particularly in the M and NPKM
                      fertilized soils. The amounts of straw-derived SOC
                      overcompensated for the SOC losses by mineralization,
                      resulting in net C sequestration which was highest in the
                      NPK fertilized soil. Our study emphasizes that NPK
                      fertilization decreases the intensity of the PE induced by
                      straw addition and increases straw C incorporation into SOC,
                      thus facilitating C sequestration in agricultural soils.},
      cin          = {IBG-3},
      ddc          = {540},
      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:000477689700044},
      doi          = {10.1016/j.soilbio.2019.06.003},
      url          = {https://juser.fz-juelich.de/record/864342},
}