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@MISC{Jiang:827862,
      author       = {Jiang, Xiaoqian and Klumpp, Erwin and Cade-Menun, Barbara
                      J. and Bol, Roland and Nischwitz, Volker and Willbold,
                      Sabine and Vereecken, Harry and Bauke, Sara L. and Amelung,
                      Wulf},
      title        = {{C}olloid-bound and dissolved phosphorus species in topsoil
                      water extracts along a grassland transect from {C}ambisol to
                      {S}tagnosol},
      reportid     = {FZJ-2017-01950},
      year         = {2017},
      note         = {Forschungsdaten zum gleichnamigen Journalartikel},
      abstract     = {Phosphorus (P) species in colloidal and “dissolved”
                      soil fractions may have different distributions. To
                      understand which P species are potentially involved, we
                      obtained water extracts from the surface soils of a gradient
                      5 from Cambisol, Stagnic Cambisol to Stagnosol from
                      temperate grassland in Germany. These were filtered to <450
                      nm, and divided into three procedurally defined fractions:
                      small-sized colloids (20–450 nm), nano-sized colloids
                      (1–20 nm), and “dissolved P” (<1 nm), using asymmetric
                      flow 10 field-flow fractionation (AF4), as well as
                      filtration for solution 31P-nuclear magnetic resonance (NMR)
                      spectroscopy. The total P of soil water extracts increased
                      in the order Cambisol<Stagnic Cambisol<Stagnosol due to
                      increasing contributions from the dissolved P fraction.
                      Associations of C–Fe/Al–PO3􀀀 15 4 /pyrophosphate were
                      absent in nanosized (1–20 nm) colloids from the Cambisol
                      but not in the Stagnosol. The 31P-NMR results indicated that
                      this was accompanied by elevated portions of organic P in
                      the order Cambisol>Stagnic Cambisol>Stagnosol. Across all 20
                      soil types, elevated proportions of inositol
                      hexakisphosphate (IHP) species (e.g., myo-, scyllo- and
                      D-chiro-IHP) were associated with soil mineral particles
                      (i.e., bulk soil and small-sized soil colloids), whereas
                      other orthophosphate monoesters and phosphonates were found
                      in the “dissolved” 25 P fraction. We conclude that P
                      species composition varies among colloidal and
                      “dissolved” soil fractions after characterization using
                      advanced techniques, i.e., AF4 and NMR. Furthermore, stagnic
                      properties affect P speciation and availability by
                      potentially releasing dissolved inorganic and esterbound P
                      forms as well as nano-sized organic matter–Fe/Al–P 30
                      colloids.},
      cin          = {IBG-3 / ZEA-3},
      ddc          = {570},
      cid          = {I:(DE-Juel1)IBG-3-20101118 / I:(DE-Juel1)ZEA-3-20090406},
      pnm          = {255 - Terrestrial Systems: From Observation to Prediction
                      (POF3-255)},
      pid          = {G:(DE-HGF)POF3-255},
      typ          = {PUB:(DE-HGF)32},
      url          = {https://juser.fz-juelich.de/record/827862},
}