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@ARTICLE{Landl:862782,
      author       = {Landl, Magdalena and Schnepf, Andrea and Uteau, Daniel and
                      Peth, Stephan and Athmann, Miriam and Kautz, Timo and
                      Perkons, Ute and Vereecken, Harry and Vanderborght, Jan},
      title        = {{M}odeling the {I}mpact of {B}iopores on {R}oot {G}rowth
                      and {R}oot {W}ater {U}ptake},
      journal      = {Vadose zone journal},
      volume       = {18},
      number       = {1},
      issn         = {1539-1663},
      address      = {Alexandria, Va.},
      publisher    = {GeoScienceWorld},
      reportid     = {FZJ-2019-03008},
      pages        = {0 -},
      year         = {2019},
      abstract     = {Roots are known to use biopores as preferential growth
                      pathways to overcome hard soil layers and access subsoil
                      water resources. This study evaluates root–biopore
                      interactions at the root-system scale under different soil
                      physical and environmental conditions using a mechanistic
                      simulation model and extensive experimental field data. In a
                      field experiment, spring wheat (Triticum aestivum L.) was
                      grown on silt loam with a large biopore density. X-ray
                      computed tomography scans of soil columns from the field
                      site were used to provide a realistic biopore network as
                      input for the three-dimensional numerical R-SWMS model,
                      which was then applied to simulate root architecture as well
                      as water flow in the root–biopore–soil continuum. The
                      model was calibrated against observed root length densities
                      in both the bulk soil and biopores by optimizing root growth
                      model input parameters. By implementing known interactions
                      between root growth and soil penetration resistance into our
                      model, we could simulate root systems whose response to
                      biopores in the soil corresponded well to experimental
                      observations described in the literature, such as increased
                      total root length and increased rooting depth. For all
                      considered soil physical (soil texture and bulk density) and
                      environmental conditions (years of varying dryness), we
                      found biopores to substantially mitigate transpiration
                      deficits in times of drought by allowing roots to take up
                      water from wetter and deeper soil layers. This was even the
                      case when assuming reduced root water uptake in biopores due
                      to limited root–soil contact. The beneficial impact of
                      biopores on root water uptake was larger for more compact
                      and less conductive soils.},
      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:000462795600001},
      doi          = {10.2136/vzj2018.11.0196},
      url          = {https://juser.fz-juelich.de/record/862782},
}