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@ARTICLE{Siebers:828993,
      author       = {Siebers, Nina and Sumann, Matthias and Kaiser, Klaus and
                      Amelung, Wulf},
      title        = {{C}limatic {E}ffects on {P}hosphorus {F}ractions of
                      {N}ative and {C}ultivated {N}orth {A}merican {G}rassland
                      {S}oils},
      journal      = {Soil Science Society of America journal},
      volume       = {81},
      number       = {2},
      issn         = {0361-5995},
      address      = {Madison, Wis.},
      publisher    = {SSSA},
      reportid     = {FZJ-2017-02810},
      pages        = {299-309},
      year         = {2017},
      abstract     = {The climatic regime influences the turnover of P in soils,
                      resulting in shifts in P fractions of different bonding
                      forms. Here, we aimed at (i) identifying possible changes in
                      P fractions as related to mean annual temperature (MAT) and
                      mean annual precipitation (MAP), as well as (ii) elucidating
                      how these patterns change under long-term agriculture. We
                      analyzed different P fractions after sequential extraction
                      according to the Hedley procedure from the top 10 cm of 18
                      native grassland sites and adjacent long-term agricultural
                      fields along a temperature and precipitation transect from
                      central Saskatoon to south Texas. The analyses were
                      performed on bulk soils and clay fractions. The results
                      showed that total P (Ptot) concentrations decreased with
                      increasing MAT but were not clearly related to MAP. The
                      contributions of total inorganic P (Pitot) and total organic
                      P (Potot) to Ptot did neither change with MAT nor with MAP.
                      The proportions of individual soil fractions were shifted
                      from the labile and easily extractable P bonding forms to
                      the more stable, residual P fractions with increasing annual
                      temperature. Arable cropping induced loss of organic P (Po).
                      The relationships to the climatic factors were sustained for
                      the arable soil, but better reflected in the clay fractions
                      than in the bulk soil. We conclude that there is a gross
                      pattern of soil P distribution related to the climate,
                      likely reflecting the increased biological processing as
                      well as and progressing weathering and neoformation of
                      secondary mineral phases as annual temperatures rise.},
      cin          = {IBG-3},
      ddc          = {550},
      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:000400696900007},
      doi          = {10.2136/sssaj2016.06.0181},
      url          = {https://juser.fz-juelich.de/record/828993},
}