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Título

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

AutorDiago, Maria P. ; Rey Carames, Clara; Le moigne, M.; Fadaili, E. M.; Tardáguila, Javier ; Cerovic, Zoran G.
Palabras claveOptical sensor
Precision viticulture
Nitrogen
Proximal sensing
Grapevine
Fecha de publicaciónoct-2016
EditorJohn Wiley & Sons
CitaciónAustralian Journal of Grape and Wine Research 22(3): 438-449 (2016)
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 (MX) and on-the-go (MX), 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 MX and with the MX mounted on an all-terrain vehicle. A significant correlation was obtained for the chlorophyll and nitrogen indices of MX and DX4 (R > 0.90) and of MX and DX4 (R > 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.
Versión del editorhttp://doi.org/10.1111/ajgw.12228
URIhttp://hdl.handle.net/10261/146427
DOI10.1111/ajgw.12228
Identificadorese-issn: 1755-0238
issn: 1322-7130
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