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- Title
Grape Quality Zoning and Selective Harvesting in Small Vineyards—To Adopt or Not to Adopt.
- Authors
Rendulić Jelušić, Ivana; Šakić Bobić, Branka; Grgić, Zoran; Žiković, Saša; Osrečak, Mirela; Puhelek, Ivana; Anić, Marina; Karoglan, Marko
- Abstract
The practical application of grape quality zoning and selective harvesting in small vineyards (<1 ha) has not yet gained much importance worldwide. However, winegrowers with small vineyards are looking for ways to improve wine quality and maximise profit. Therefore, the aim of this study was to identify the most predictive vegetation index for grape quality zoning among three vegetation indices—NDVI, NDRE, and OSAVI—at three grapevine growth stages for the efficient use in small vineyards for the selective harvesting and production of different wine types from the same vineyard. Multispectral images were used to delineate two vigour zones at three different growth stages. The target vines were sampled, and the most predictive vegetation index was determined by overlapping the quality and vigour structures for each site and year. A differential economic analysis was performed, considering only the costs and revenues associated with grape quality zoning. The results show that OSAVI is the least predictive, while NDVI and NDRE are useful for grape quality zoning and selective harvesting. Multi-year monitoring is required to determine the ideal growth stage for image acquisition. The use of grape quality zoning and selective harvesting can be economically efficient for small wineries producing two different "super-premium" wines from the same vineyard.
- Subjects
GRAPE quality; GRAPE harvesting; VINEYARDS; ZONING; HARVESTING; MULTISPECTRAL imaging; GRAPES
- Publication
Agriculture; Basel, 2022, Vol 12, Issue 6, pN.PAG
- ISSN
2077-0472
- Publication type
Article
- DOI
10.3390/agriculture12060852