Using a fluorescence proximal sensor to study the spatial variability of grape phenols in a tempranillo vineyard

  1. Baluja, J. 1
  2. Diago, M.P. 1
  3. Rocchi, L. 1
  4. Ochagavia, H. 1
  5. Tardaguila, J. 12
  1. 1 Instituto de Ciencias de la Vid y del Vino
    info

    Instituto de Ciencias de la Vid y del Vino

    Logroño, España

    ROR https://ror.org/01rm2sw78

  2. 2 Universidad de La Rioja
    info

    Universidad de La Rioja

    Logroño, España

    ROR https://ror.org/0553yr311

Buch:
Precision Agriculture 2011 - Papers Presented at the 8th European Conference on Precision Agriculture 2011, ECPA 2011

Verlag: Czech Centre for Science and Society

ISBN: 9788090483057

Datum der Publikation: 2011

Seiten: 577-584

Art: Buch-Kapitel

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Zusammenfassung

The phenolic content of berries is a very important parameter to define grape and wine quality. The aim of this work was to study the spatial variability of grape phenols in a vineyard using a new proximal fluorescence sensor. A regular sampling grid of 67 blocks was built in a 2.2 ha Tempranillo (Vitis vinifera L.) vineyard. The phenolic content of grapes was assessed using the portable Multiplex™ fluorescence sensor in three clusters of three vines per block at two different stages (veraison and harvest). Omni-directional semi-variograms were built for Multiplex™ parameters which are related to anthocyanin and flavonol content in grapes. Kriged maps were obtained for each parameter at veraison and harvest. All parameters showed a stronger spatial dependence at veraison and a larger range at harvest. These results suggest that a portable proximal sensor can be used to assess the spatial variability of grape phenols in a vineyard and for mapping winegrape composition attributes.