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@ARTICLE{Agnelli:172188,
      author       = {Agnelli, A. and Bol, R. and Trumbore, S. E. and Dixon, L.
                      and Cocco, S. and Corti, G.},
      title        = {{C}arbon and nitrogen in soil and vine roots in harrowed
                      and grass-covered vineyards},
      journal      = {Agriculture, ecosystems $\&$ environment},
      volume       = {193},
      issn         = {0167-8809},
      address      = {Amsterdam [u.a.]},
      publisher    = {Elsevier},
      reportid     = {FZJ-2014-05685},
      pages        = {70 - 82},
      year         = {2014},
      abstract     = {To examine the effects of vineyard soil management on soil
                      C and N content and quality, we studied harrowed and
                      grass-covered vineyards on a soil developed on
                      plio-pleistocene, marine sediments. A soil naturally covered
                      by grasses adjacent to the vineyards served as control. To
                      reach this goal, we assessed (1) the distribution of C and N
                      and their 13C and 15N signatures in different soil organic
                      matter pools, (2) the amount of C and N as live and dead
                      vine fine roots and their 13C, 15N and 14C signatures, and
                      (3) the stocks of C and N forms accumulated at two
                      soil-depth intervals (0–50 and 50–100 cm).Independent of
                      the soil management, the vines increased the total organic C
                      and total N content in the deeper soil horizons because of
                      root turnover and rhizodeposition processes. In the upper
                      horizons, a greater organic matter accumulation was fostered
                      by the presence of the grass cover and the absence of
                      tillage. The grass cover favoured the organic C storage
                      mainly in the form of particulate and highly stabilised
                      organic matter (humic acids and humin), and reduced the soil
                      N content by plant uptake, whereas the harrowing produced a
                      greater abundance of fulvic acids, which were mainly
                      ascribed to oxidative processes enhanced by the soil
                      tillage. In both vineyard soils, decaying vine roots
                      represented an important source of organic C and N,
                      especially in the deepest horizons. Indeed, isotope analyses
                      revealed a more intense degradation of the dead vine roots
                      in the deeper soil portion, where they likely constituted
                      the main substrate for soil microorganisms. In the deepest
                      horizons of the grass-covered vineyard, the greater mean
                      residence time of the decaying vine roots and the lower root
                      production were attributed to the easily available energetic
                      substrates supplied by grass root turnover and
                      rhizodeposition, which were preferentially used by
                      microorganisms. This fact fostered a larger C accumulation
                      in the grass-covered than in the harrowed vineyard.},
      cin          = {IBG-3},
      ddc          = {330},
      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:000338618400008},
      doi          = {10.1016/j.agee.2014.04.023},
      url          = {https://juser.fz-juelich.de/record/172188},
}