% 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{Bauke:840438,
      author       = {Bauke, S. L. and von Sperber, C. and Siebers, N. and
                      Tamburini, F. and Amelung, W.},
      title        = {{B}iopore effects on phosphorus biogeochemistry in
                      subsoils},
      journal      = {Soil biology $\&$ biochemistry},
      volume       = {111},
      issn         = {0038-0717},
      address      = {Amsterdam [u.a.]},
      publisher    = {Elsevier Science},
      reportid     = {FZJ-2017-07955},
      pages        = {157 - 165},
      year         = {2017},
      abstract     = {Biopores are characterised by high concentrations of plant
                      available nutrients and provide preferential pathways for
                      root growth into the subsoil, thereby potentially enabling
                      plants to access phosphorus (P) resources located in the
                      subsoil. Here, we sampled biopores from a replicated
                      agricultural field trial in Klein-Altendorf, Germany, to
                      analyse their nutrient composition and P speciation as
                      determined by Hedley sequential extraction and X-ray
                      absorption near edge structure (XANES) spectroscopy. In
                      addition, we analysed the oxygen isotopic composition of HCl
                      P (δ18OHCl P) as an indicator of long-term effects of
                      biological P turnover. We found that biopore effects were
                      most pronounced in the subsoil, where the concentration of
                      easily extractable (labile) P tended to be greater in
                      biopores than in bulk soil, as evident in both Hedley
                      sequential extraction and XANES spectroscopy. We assume that
                      these findings result from inputs of organic matter from the
                      topsoil as well as an input of Ca-particles into subsoil
                      biopores by earthworm activity. Biologically cycled P was
                      subsequently precipitated as Ca-P as evident by δ18OHCl P
                      values close to equilibrium in biopores even at great
                      depths. When incubating bulk soil samples with 18O-labelled
                      water, however, we observed a significant increase of
                      δ18OHCl P values in the topsoil, but only small if any
                      changes of δ18OHCl P values in the subsoil. Thus, biopores
                      present hotspots of P cycling in the subsoil, but the effect
                      of biopores on overall P turnover in the bulk subsoil is
                      limited.},
      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:000401877800018},
      doi          = {10.1016/j.soilbio.2017.04.012},
      url          = {https://juser.fz-juelich.de/record/840438},
}