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@ARTICLE{Bauke:827625,
      author       = {Bauke, S. L. and Landl, M. and Koch, M. and Hofmann, D. and
                      Nagel, Kerstin and Siebers, N. and Schnepf, A. and Amelung,
                      W.},
      title        = {{M}acropore effects on phosphorus acquisition by wheat
                      roots – a rhizotron study},
      journal      = {Plant and soil},
      volume       = {416},
      number       = {1-2},
      issn         = {1573-5036},
      address      = {Dordrecht [u.a.]},
      publisher    = {Springer Science + Business Media B.V},
      reportid     = {FZJ-2017-01739},
      pages        = {67–82},
      year         = {2017},
      abstract     = {Background and aimsMacropores may be preferential root
                      pathways into the subsoil. We hypothesised that the presence
                      of macropores promotes P-uptake from subsoil, particularly
                      at limited water supply in surface soil. We tested this
                      hypothesis in a rhizotron experiment with spring wheat
                      (Triticum aestivum cv. Scirocco) under variation of
                      fertilisation and irrigation.MethodsRhizotrons were filled
                      with compacted subsoil (bulk density 1.4 g cm−3),
                      underneath a P-depleted topsoil. In half of these rhizotrons
                      the subsoil contained artificial macropores. Spring wheat
                      was grown for 41 days with and without irrigation and
                      31P–addition. Also, a 33P–tracer was added at the soil
                      surface to trace P-distribution in plants using liquid
                      scintillation counting and radioactive
                      imaging.ResultsFertilisation and irrigation promoted biomass
                      production and plant P-uptake. Improved growing conditions
                      resulted in a higher proportion of subsoil roots, indicating
                      that the topsoil root system additionally promoted subsoil
                      nutrient acquisition. The presence of macropores did not
                      improve plant growth but tended to increase translocation of
                      33P into both above- and belowground biomass. 33P–imaging
                      confirmed that this plant-internal transport of topsoil-P
                      extended into subsoil roots.ConclusionsThe lack of
                      penetration resistance in macropores did not increase plant
                      growth and nutrient uptake from subsoil here; however, wheat
                      specifically re-allocated topsoil-P for subsoil root
                      growth.},
      cin          = {IBG-2 / IBG-3},
      ddc          = {570},
      cid          = {I:(DE-Juel1)IBG-2-20101118 / I:(DE-Juel1)IBG-3-20101118},
      pnm          = {582 - Plant Science (POF3-582) / 255 - Terrestrial Systems:
                      From Observation to Prediction (POF3-255)},
      pid          = {G:(DE-HGF)POF3-582 / G:(DE-HGF)POF3-255},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000405916400006},
      doi          = {10.1007/s11104-017-3194-0},
      url          = {https://juser.fz-juelich.de/record/827625},
}