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@ARTICLE{Xu:887684,
      author       = {Xu, Yingde and Sun, Liangjie and Lal, Rattan and Bol,
                      Roland and Wang, Yang and Gao, Xiaodan and Ding, Fan and
                      Liang, Siwei and Li, Shuangyi and Wang, Jingkuan},
      title        = {{M}icrobial assimilation dynamics differs but total
                      mineralization from added root and shoot residues is similar
                      in agricultural {A}lfisols},
      journal      = {Soil biology $\&$ biochemistry},
      volume       = {148},
      issn         = {0038-0717},
      address      = {Amsterdam [u.a.]},
      publisher    = {Elsevier Science},
      reportid     = {FZJ-2020-04345},
      pages        = {107901 -},
      year         = {2020},
      abstract     = {Microbial transformation of crop residue is the key process
                      of soil organic matter (SOM) formation and mineralization,
                      which determines soil fertility and affects global climate
                      change. However, utilization dynamics of residue-derived
                      carbon (residue C) by various microbial communities is still
                      not well understood, especially under different residue
                      quality and soil fertility conditions over a long-term scale
                      (i.e., >1 year). In this study, a 500-day in-situ field
                      experiment was conducted using 13C-labeled maize (Zea mays
                      L.) root and shoot (composed of both stem and leaf) to
                      examine the role of microbial community composition on the C
                      processing. Specifically, the mineralization of residue C
                      and incorporation of residue C into microbial biomass in low
                      fertility (LF) and high fertility (HF) soils were
                      investigated. The abundance of 13C in soil samples and
                      microbial phospholipid fatty acids (PLFAs) were measured
                      after 60, 90, 150 and 500 days since the residues added. The
                      results showed that the mineralization rate of residue C was
                      significantly higher in the LF than that in the HF soil for
                      the first 150 days, and the shoot-derived C was more
                      susceptible to degradation than root-derived C, but the
                      final mineralization rates $(~78\%)$ were not significantly
                      different among treatments on the day 500. Soil fertility
                      significantly affected the relative composition of different
                      microbial groups and distribution of residue C in microbial
                      communities, but residue type did not do so. Furthermore,
                      residue C contributed more to PLFA-C pool in the LF than HF
                      treatments, and the proportion of root C in PLFA-C pool was
                      higher than that of shoot C, indicating easier
                      immobilization of root C by soil microbial anabolism.
                      Accordingly, soil fertility and residue quality could both
                      regulate the kinetics of the microbial immobilization of
                      crop residue C, but overall the available residual quantity
                      of applied (plant-derived) C to enhance or maintain soil C
                      pool did not depend on them in a long term in the
                      agricultural Alfisols.},
      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:000566668900033},
      doi          = {10.1016/j.soilbio.2020.107901},
      url          = {https://juser.fz-juelich.de/record/887684},
}