On-The-Go VIS + SW - NIR Spectroscopy as a Reliable Monitoring Tool for Grape Composition within the Vineyard

Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry
Juan Fernández-NovalesMaría Paz Diago

Abstract

Visible-Short Wave Near Infrared (VIS + SW - NIR) spectroscopy is a real alternative to break down the next barrier in precision viticulture allowing a reliable monitoring of grape composition within the vineyard to facilitate the decision-making process dealing with grape quality sorting and harvest scheduling, for example. On-the-go spectral measurements of grape clusters were acquired in the field using a VIS + SW - NIR spectrometer, operating in the 570-990 nm spectral range, from a motorized platform moving at 5 km/h. Spectral measurements were acquired along four dates during grape ripening in 2017 on the east side of the canopy, which had been partially defoliated at cluster closure. Over the whole measuring season, a total of 144 experimental blocks were monitored, sampled and their fruit analyzed for total soluble solids (TSS), anthocyanin and total polyphenols concentrations using standard, wet chemistry reference methods. Partial Least Squares (PLS) regression was used as the algorithm for training the grape composition parameters' prediction models. The best cross-validation and external validation (prediction) models yielded determination coefficients of cross-validation (R2cv) and prediction (R2P) of 0.92 and 0.95...Continue Reading

References

Jun 21, 2002·Annals of the New York Academy of Sciences·Andrew L Waterhouse
Jan 22, 2004·Journal of Agricultural and Food Chemistry·Jorge E AndaurPablo Irarrázaval
Dec 20, 2014·Journal of the Science of Food and Agriculture·Roberto BeghiRiccardo Guidetti
Mar 31, 2015·Journal of Agricultural and Food Chemistry·Belén GordilloM Teresa Escribano-Bailón
Sep 25, 2015·Journal of the Science of Food and Agriculture·Ruben UrracaMaria P Diago
Sep 23, 2016·Journal of Agricultural and Food Chemistry·Maria P DiagoJavier Tardaguila

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Citations

Dec 5, 2019·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Krzysztof B Beć, Christian W Huck
Aug 13, 2020·Plant Methods·Yirui HuangXuan Liu

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Methods Mentioned

BETA
light scattering

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SL Utilities
QGIS
MATLAB

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