% IMPORTANT: The following is UTF-8 encoded.  This means that in the presence
% of non-ASCII characters, it will not work with BibTeX 0.99 or older.
% Instead, you should use an up-to-date BibTeX implementation like “bibtex8” or
% “biber”.

@ARTICLE{Abdelrahman:1008329,
      author       = {Abdelrahman, Hamada and Hofmann, Diana and Sleighter,
                      Rachel L. and Olk, Daniel C. and Berns, Anne E. and Miano,
                      Theodoro and Shaheen, Sabry M. and Claudio, Cocozza},
      title        = {{M}olecular composition and possible transformations of
                      labile soil organicmatter fractions in {M}editerranean
                      arable soils: {R}elevance and implications},
      journal      = {Environmental research},
      volume       = {232},
      issn         = {0013-9351},
      address      = {San Diego, Calif.},
      publisher    = {Elsevier},
      reportid     = {FZJ-2023-02291},
      pages        = {116315},
      year         = {2023},
      abstract     = {With the increased global interest in sequestering carbon
                      in soil, it is necessary to understand the composition
                      ofdifferent pools of soil organic matter (SOM) that cycle
                      over suitably short timeframes. To explore in detail
                      thechemical composition of agroecologically relevant yet
                      distinct fractions of SOM, the light fraction of SOM(LFOM),
                      the 53-μm particulate organic matter (POM), and the mobile
                      humic acid (MHA) fractions weresequentially extracted from
                      agricultural soils and characterized using both 13C cross
                      polarization magic anglespinning nuclear magnetic resonance
                      (CPMAS NMR) spectroscopy and also Fourier transform ion
                      cyclotronresonance mass spectrometry (FT-ICR-MS). The NMR
                      results showed a decrease in the O-alkyl C region assignedto
                      carbohydrates (51–110 ppm) and an increase in the aromatic
                      region (111–161 ppm) proceeding from theLFOM to the POM
                      and then to the MHA fraction. Similarly, based on the
                      thousands of molecular formulaeassigned to the peaks
                      detected by FT-ICR-MS, condensed hydrocarbons were dominant
                      only in the MHA, whilealiphatic formulae were abundant in
                      the POM and LFOM fractions. The molecular formulae of the
                      LFOM andPOM were mainly grouped in the high H/C lipid-like
                      and aliphatic space, whereas a portion of the MHA
                      compoundsshowed an extremely high (17–33, average of 25)
                      double bond equivalent (DBE) values, corresponding tolow H/C
                      values of 0.3–0.6, representative of condensed
                      hydrocarbons. The labile components appeared mostpronounced
                      in the POM $(93\%$ of formulae have H/C ≥ 1.5) similar to
                      the LFOM $(89\%$ of formulae have H/C ≥1.5) but in
                      contrast to the MHA $(74\%$ of formulae have H/C ≥ 1.5).
                      The presence of both labile and recalcitrantcomponents in
                      the MHA fraction suggests that the stability and persistence
                      of soil organic matter is influenced bya complex interaction
                      of physical, chemical, and biological factors in soil.
                      Understanding the composition anddistribution of different
                      SOM fractions can provide valuable insights into the
                      processes that govern carboncycling in soils, which can help
                      inform strategies for sustainable land management and
                      climate changemitigation.},
      cin          = {IBG-3},
      ddc          = {610},
      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       = {37276976},
      UT           = {WOS:001018325900001},
      doi          = {10.1016/j.envres.2023.116315},
      url          = {https://juser.fz-juelich.de/record/1008329},
}