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@ARTICLE{Prolingheuer:153795,
      author       = {Prolingheuer, N. and Scharnagl, B. and Graf, A. and
                      Vereecken, H. and Herbst, M.},
      title        = {{O}n the spatial variation of soil rhizospheric and
                      heterotrophic respiration in a winter wheat stand},
      journal      = {Agricultural and forest meteorology},
      volume       = {195-196},
      issn         = {0168-1923},
      address      = {Amsterdam [u.a.]},
      publisher    = {Elsevier},
      reportid     = {FZJ-2014-03281},
      pages        = {24 - 31},
      year         = {2014},
      abstract     = {Field-scale soil respiration reveals a tremendous
                      variability in space. In order to quantify the spatial
                      variability originating from the heterotrophic and the
                      rhizospheric contribution to total soil respiration, the
                      root exclusion method was applied. At 61 locations within a
                      50 m × 50 m plot in a winter wheat stand, 7 cm-collars and
                      50 cm-collars were inserted prior to the root growth to
                      simultaneously measure total respiration and heterotrophic
                      respiration. The rhizospheric component was determined as
                      the difference between the flux measurements of total and
                      heterotrophic respiration. During the vegetation period
                      2009, in total 18 repeated measurements, including soil
                      temperature and moisture, were carried out.The highest
                      spatial variability in terms of standard deviation up to 2.9
                      􏱅mol CO2 m−2 s−1 was detected for the rhizospheric
                      respiration during the period of massive plant growth.
                      Compared to the heterotrophic contribution the coefficient
                      of variation in space was constantly higher for the
                      rhizospheric contribution. Variogram analyses revealed an
                      almost completely random spatial distribution of
                      heterotrophic respira- tion, whereas the rhizospheric
                      respiration showed a clear spatial autocorrelation. The
                      spatial pattern of total respiration mainly resembles the
                      pattern of the rhizospheric component and is characterized
                      by an average spatial correlation length of 18 m.The results
                      indicate that the sampling design for chamber-based
                      measurements of soil respiration in agro-ecosystems should
                      account for the high spatial variability during plant growth
                      and collars should be separated by a distance larger than
                      the spatial correlation range to ensure uncorrelated samples
                      and thus unbiased representative flux estimates.},
      cin          = {IBG-3},
      ddc          = {630},
      cid          = {I:(DE-Juel1)IBG-3-20101118},
      pnm          = {246 - Modelling and Monitoring Terrestrial Systems: Methods
                      and Technologies (POF2-246) / 255 - Terrestrial Systems:
                      From Observation to Prediction (POF3-255)},
      pid          = {G:(DE-HGF)POF2-246 / G:(DE-HGF)POF3-255},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000339216600003},
      doi          = {10.1016/j.agrformet.2014.04.016},
      url          = {https://juser.fz-juelich.de/record/153795},
}