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@ARTICLE{Missong:838330,
      author       = {Missong, Anna and Nischwitz, Volker and Bol, Roland and
                      Siemens, Jan and Krüger, Jaane and Lang, Friederike and
                      Klumpp, Erwin},
      title        = {{P}hosphorus in water dispersible-colloids of forest soil
                      profiles},
      journal      = {Plant and soil},
      volume       = {4227},
      number       = {1-2},
      issn         = {0032-079X},
      address      = {Dordrecht [u.a.]},
      publisher    = {Springer Science + Business Media B.V},
      reportid     = {FZJ-2017-06968},
      pages        = {71-86},
      year         = {2018},
      abstract     = {Background and aimsNanoparticles and colloids affect the
                      mobilisation and availability of phosphorus for plants and
                      microorganisms in soils. We aimed to give a description of
                      colloid sizes and composition from forest soil profiles and
                      to evaluate the size-related quality of colloids for P
                      fixation.MethodsWe investigated the size-dependent elemental
                      composition and the P content of water-dispersible colloids
                      (WDC) isolated from five German (beech-dominated) forest
                      soil profiles of varying bulk soil P content by field-flow
                      fractionation (FFF) coupled to various
                      detectors.ResultsThree size fractions of WDC were separated:
                      (i) nanoparticles <25 nm (NP) rich in Corg, (ii) fine
                      colloids (25 nm–240 nm; FC) composed mainly of Corg, Fe
                      and Al, probably as associations of Fe- and Al- (hydr)oxides
                      and organic matter, and (iii) medium-sized colloids (240
                      nm–500 nm; MC), rich in Fe, Al and Si, indicating the
                      presence of phyllosilicates. The P concentration in the
                      overall WDC was up to 16 times higher compared to the bulk
                      soil. The NP content decreased with increasing soil depth
                      while the FC and MC showed a local maximum in the mineral
                      topsoil due to soil acidification, although variant
                      distributions in the subsoil were observed. NP were of great
                      relevance for P binding in the organic surface layers,
                      whereas FC- and MC-associated P dominated in the Ah
                      horizon.ConclusionThe nanoparticles and colloids appeared to
                      be of high relevance as P carriers in the forest surface
                      soils studied, regardless of the bulk soil P content.},
      cin          = {IBG-3},
      ddc          = {570},
      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:000434056500006},
      doi          = {10.1007/s11104-017-3430-7},
      url          = {https://juser.fz-juelich.de/record/838330},
}