Mattii, Giovan Battista

Salvi, Linda

Sarri, Daniele

Vieri, Marco

English

Florence Research

Geophysical Research AbstractsVol. 21, EGU2019-9160, 2019EGU General Assembly 2019© Author(s) 2019. CC Attribution 4.0 license.Coupling soil and canopy proximal sensing in vineyards to assess shortrange variability of grape qualitySimone Priori (1), Daniele Sarri (2), Lorenzo D’Avino (1), Giovanni L’Abate (1), Linda Salvi (2), Marco Vieri(2), Giovan Battista Mattii (2), and Marco Antoni (3)(1) CREA, Research Centre for Agriculture and Environment, Firenze, Italy (simone.priori@crea.gov.it), (2) DAGRIDepartment of Agricultural, Alimentary, Environmental and Forestry sciences, Università degli Studi di Firenze, Italy , (3)Copernico s.r.l., Montalcino, Siena, ItalySelective grape harvest, based on short distance variability of soil and vine features, can be an important toolto optimize and increase wine quality. This precision viticulture approach needs suitable maps of functionalhomogeneous zones (fHZs), discriminated by their potential functionality (eg. soil water retention, grapevinevigour, etc.).Objective of this work was coupling methods of proximal sensing for soil (ECa, apparent electrical conductivitymeasured by electromagnetic induction) and crop (NDRE, Normalized Difference Red Edge) mapping to delineatefHZs within the vineyards. Study vineyards were situated in 4 different terroir of Brunello di Montalcino DOCGdistrict, southern Tuscany, and they shared the same grape cultivar (Sangiovese) and similar age and management.Each vineyard was split into two fHZs after k-means clustering, using the maps obtained by proximal sensing asinput data. For each fHZs, a soil profile was described and analyzed, as well as 10 grapevines were selected toanalyze grape at harvest (berries weight, sugar content, pH, total acidity, polyphenols and anthocyanins).The results showed that grapevine vigour, mapped through NDRE, generally followed the ECa soil spatial vari-ability. Indeed, soil limitations, namely shallow rooting depth, low chemical fertility and available water content,moderately restrained grapevine vigour. This moderate stress induced a decrease of grape berries dimensions andweight (from -16% to 49%), as well as increase of polyphenols and anthocyanins. Sugar content and acidity weresimilar between the grapes of the two fHZs, although differences were individuated in some cases. This proximalsensing approach can be suitable to discriminate two, or more, homogeneous areas within a vineyard, allowing toobtain different grape quality by selective harvests.

Coupling soil and canopy proximal sensing in vineyards to assess short range variability of grape quality

https://flore.unifi.it/bitstream/2158/1167981/1/EGU2019-9160.pdf

Coupling soil and canopy proximal sensing in vineyards to assess short range variability of grape quality

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