Terroir 2006 banner
IVES 9 IVES Conference Series 9 Monitoring water deficit in vineyards by means of Red and Infrared measurements

Monitoring water deficit in vineyards by means of Red and Infrared measurements

Abstract

Vineyard water availability is one of the most important variables both in plant’s production and wine quality, once it regulates several processes, among which the stomata activity. To avoid water deficit, wine producers introduced artificial irrigation in their vineyard, using a semi-empirical process to calculate water amount. Some previous research presented measurements in the infrared wave bands and PAR (photosynthetic active radiation) as a process to estimate water stress and to calculate water needs. This paper analyses and explores the relationship that could be established between red, infrared and PAR in vegetation indices calculation and leaf area index and the relationship between these indices and water availability or deficit. Data from this process could be used to design irrigation schemes, saving water and controlling vineyards needs.

DOI:

Publication date: December 22, 2021

Issue: Terroir 2006

Type: Article

Authors

Fernando ALVES (1), Fernanda ALMEIDA (1), Moutinho PEREIRA (2) Nuno Magalhães (3) and Jose ARANHA (4)

(1) ADVID – Assoc. Desenv. Viticultura Duriense, Peso da Regua, Portugal
(2) Dept. Eng. Biológica e Ambiental / CETAV, UTAD, Vila Real, Portugal
(3) Dept Fitotecnia, UTAD, Vila Real, Portugal
(4) Dept. Florestal, UTAD, Vila Real, Portugal

Contact the author

Keywords

vineyards, water deficit, red and infrared, vegetation Index (NDVI)

Tags

IVES Conference Series | Terroir 2006

Citation

Related articles…

Zoning, environment, and landscape: historic and perspective

Dans une approche globale, nous proposons la définition suivante du zonage : “représentation cartographique associée à une sectorisation du territoire en zones unitaires homogènes à partir de facteurs discriminants établis sur la base d’indicateurs quantifiables et d’avis d’experts”. La première application de cette méthode a porté sur la caractérisation du terroir en liaison avec les aspects qualitatifs des vins. Il est également possible d’envisager d’appliquer cette démarche dans les stratégies environnementales et paysagères liées aux approches territoriales et aux pratiques viticoles. Cette méthode peut servir de base dans la mise en œuvre des outils financiers associés aux mesures environnementales (CTE, aides spécifiques).

Il piano regolatore delle citta’ del vino: una metodologia di lavoro

Sono quattro i terni fondamentali di questo progetto: la sostenibilità; la conoscenza; la parte­cipazione come strumento anche di riduzione della burocrazia e il tema della coerenza delle politiche di settore e della collaborazione fra gli Enti.

Genomic characterization of extant genetic diversity in grapevine

Dating back to the early domestication period of grapevine (Vitis vinifera L.), expansion of human activity led to the creation of thousands of modern day genotypes that serve multiple purposes such as table and wine consumption. They also encompass a strong phenotypic diversity. Presently, viticulture faces various challenges, which include threatening climatic change scenarios and an historical track record of genetic erosion. Paritularly with regards to wine varieties, there is a pressing need to characterize the extant genetic diversity of modern varieties, as a means to delvier knowledge-based solutions under a rapidly evolving scenario, that may enable improved yields and profiles, resistance to pathogens, and increased resilience to climate change.

Regulation of terpene production in methyl jasmonate treated cell-cultures

Terpenes are responsible for flavors and aromas of grapes, however, they also protect from radiation, participate in biotic stress and antioxidant mechanisms. The phytohormone methyl jasmonate (MeJA) mediates many of these stress responses and has been associated with increased terpene content in berries. Here, we generated transcriptomic data of Vitis vinifera cv. ‘Gamay’ cells treated with MeJA (100 μM) and cyclodextrins (50 μM) to understand these responses. Ontology analysis revealed that up-regulated genes (URGs) were enriched in jasmonic acid biosynthesis and signaling terms, as expected. Inspection of transcription factors (TFs) among URGs allowed us to study uncharacterized TFs.

The sea breeze: a significant climatic factor for viticultural zoning in coastal wine growing areas

La brise de mer est un facteur climatique important pour le zonage viticole des régions viticoles côtières car l’accélération du vent qui lui est associée l’après midi ainsi que l’augmentation de l’humidité relative et la réduction de la température concomitantes sont significatives pour le fonctionnement de la vigne et, par conséquent, la qualité du raisin et du vin