GiESCO 2019 banner
IVES 9 IVES Conference Series 9 GiESCO 9 GiESCO 2019 9 Monitoring of ripening and yield of vineyards in Nemea region using UAV

Monitoring of ripening and yield of vineyards in Nemea region using UAV

Abstract

Context and purpose of the study ‐ Nemea region is the largest POD zone in Greece. Agiorgitiko (Vitis vinifera L. cv.) is the most cultivated variety in Greece with significant wine potential. Due to the extension of the area there is a great variability of soil content and climatic conditions. Seven vineyards in the POD zone were selected and monitored for ripening evolution and yield of vine plots using UAV through the extraction of vegetation indices (NDVI, NDRE, GNDVI and OSAVI). Grapes were harvested at maturity and the enological potential was estimated. Winemaking was applied in order to evaluate the potential of each sub‐zone and in order to search if any connection with the vegetation indices. The aim of this study is to research the “terroir” impact in Agiorgitiko grapes and compare the quality features in order to split the Nemea region in subzones.

Material and methods ‐ Four flights took place during the summer of 2018. The UAV platform used was the DJI Matrice 100 and was equipped with the Parrot Sequoia camera. The collected images were combined into orthosmosaics and further analysis was made by combining these mosaics and extracting vegetation indices. From each vineyard grapes were sampled to be analyzed for their physicochemical properties (sugar content, total acidity, pH, YAN, color characteristics). Furthermore, grapes from each vineyard were harvested on the technological maturity level. The same vinification protocol was applied in all samples. After the alcoholic fermentation was conducted the wines were inoculated with lactic bacteria for malolactic fermentation. Classical analysis was performed in all samples.

Results ‐ Vegetation indices (NDVI, NDRE, GNDVI and OSAVI) showed significant differences in each vineyard. Also, significant differences were observed in grapes and wines originated from different vineyards. Phenolic and anthocyanin profile indicated a greater potential in wines from vineyards in higher altitude.

Download the PDF

DOI:

Publication date: June 22, 2020

Issue: GiESCO 2019

Type: Article

Authors

Ioannis KATSIKIS (1), Dionissios KALIVAS (1), Georgios KOTSERIDIS (2), Maria Ioanna XENIA (2)

(1) AUA Department of Natural Resources Management & Agricultural Engineering, Laboratory of Soil Science and Agricultural Chemistry, G.I.S. Research Group, Athens, Greece
(2) AUA Department of Food Science & Human Nutrition, Laboratory of Oenology and Alcoholic Beverages, Athens, Greece

Contact the author

Keywords

Agiorgitiko, Remote Sensing, Ripening Monitor, Vegetation Indices, Wine Analysis

Tags

GiESCO 2019 | IVES Conference Series

Citation

Related articles…

Aspects concernant les relations entre quelques composantes de la biomasse viticole, en fonction de l’offre des ressources écologiques

Ecological resources represent vegetation factors, or even production factors, in quantitative expression. These, used by plants, transformed and organized according to their genetic program, become the material components of biomass. Subsequently, the ecological resources can be used as synthetic indicators of the ecological supply, necessary for the analysis of favorability for the understanding of ecosystems.

Read More

Cover crops competition for water in vineyards: case studies in mediterranean terroirs

Vineyard cover cropping is a cultural practice widely used in many of the world’s winegrowing regions being one of the most recommended practices to face climate changes and to promote vineyard environmental sustainability.

Read More

The antioxidant properties of wine lees extracts in model wine

While the ethanol and tartaric acid contained in wine lees are typically recovered by distilleries, the remaining solid fraction (yeast biomass) is usually disposed of, thus negatively affecting the overall sustainability of the wine industry.

Read More

The impact of differences in soil texture within a vineyard on vine development and wine quality

Marlborough Sauvignon Blanc has rapidly gained an international reputation for style and quality. The extent to which this can be attributed to the climate, soils or vineyard management is at present unclear. However, the young alluvial soils of the Wairau Plains are considered to play an important role in determining this unique wine style. Marked changes in soil texture occur on the Wairau Plains over short distances.

Read More

Free and bound terpene profile of recovered minority white grape varieties by GC × GC-TOFMS

Climate change presents a significant challenge for actual viticulture. In this context, recovering minority grape varieties can be a crucial strategy to ensure resilience, particularly those capable of maintaining quality and aromatic complexity under water stress.

Read More