Calibration of non-invasive fluorescence-based sensors for the manual and on-the-go assessment of grapevine vegetative status in the field Authors

María Paz Diago Santamaría; Clara Rey Caramés; Marine Le Moigne; El Mostafa Fadaili; Javier Tardáguila Laso; Z.G. Cerovic

Ayuda

Calibration of non-invasive fluorescence-based sensors for the manual and on-the-go assessment of grapevine vegetative status in the field Authors

M.P. Diago ^[2] ; C. Rey-Carames ^[2] ; M. Le Moigne ^[1] ; E.M. Fadaili ^[1] ; J. Tardaguila ^[2] ; Z.G. Cerovic ^[1]
1. [1] University of Paris-Sud
  
  University of Paris-Sud
  
  Arrondissement de Palaiseau, Francia
2. [2] Insti tu to d e Ciencias de la Vid y del Vino
Localización: Australian journal of grape and wine research, ISSN 1322-7130, Vol. 22, Nº 3, 2016, págs. 438-449
Idioma: inglés
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Resumen
- Background and Aims Optical sensors can accomplish frequent and spatially widespread non-destructive monitoring of plant nutrient status. The main goal was to calibrate a fluorescence sensor, used both manually (MXH) and on-the-go (MXM), for the assessment of the spatial variability in the vineyard of the concentration of chlorophyll, flavonol and nitrogen in grapevine leaves, against that of a leaf-clip type optical sensor (DX4).
  
  Methods and Results Measurements were taken in a commercial vineyard on the adaxial and abaxial sides of leaves of nine Vitis vinifera L. cultivars, manually with the DX4 and MXH, and with the MXM mounted on an all-terrain vehicle. A significant correlation was obtained for the chlorophyll and nitrogen indices of MXH and DX4 (R2 > 0.90) and of MXM and DX4 (R2 > 0.74), and the calibration equations were defined. A similar spatial distribution was achieved for the chlorophyll, flavonol and nitrogen indices of the leaves.
  
  Conclusions The capability of the fluorescence sensor, used manually and on-the-go, for characterising the nutritional status of grapevines was demonstrated.
  
  Significance of the Study This work reports the first calibration of the hand-held and on-the-go fluorescence sensor to assess key nutritional parameters of grapevines. The applicability of this sensor on-the-go to characterise the spatial variability of the vegetative status of a vineyard for the delineation of homogeneous management zones was proved.