Macrowine 2021

Smartphone application use as a tool for water supply management

Abstract

Uruguay had an average annual rainfall of 1200 mm characterized by a high monthly variability, which generates periods of water deficit and excess. The rational water management, in the moments of deficit becomes more and more necessary in a viticulture that for this region is not used to irrigation. Therefore, permanent and real-time monitoring of the water status of the vineyard is important to avoid negative consequences on the yield and composition of the grapes. The availability of numerous smartphone applications allows the winegrower to use his own Smartphone as a tool for monitoring the vineyard. The objective of this work was to provide a reasonable water supply to the vineyard using digital tools that facilitate the management of the vineyard at a productive level. The experiment was carried out in a commercial vineyard of the red variety Tannat during the 2020 season. An irrigation treatment (70% ETP) was compared with a control without irrigation. Leaf water potential, leaf area, yield, grape composition (acidity, sugars, anthocyanins) were determined. The used smartphone applications were Viticanopy and ApexVigne. The data provided by the apps were correlated with the variables obtained in the field. It was possible to estimate the evolution of Kc in a quick and simple way, which allowed to made adjustments of the irrigation dose almost in real-time. During the season, 140 mm of water were applied leading to an enhancement in the response of the plant. The yield was increased by 35% while sugar and phenolic compounds concentrations were improved in the grape in comparison with the control sample. The use of smartphone applications proven to be a useful tool for the winegrower to manage the use of water resources.

DOI:

Publication date: September 2, 2021

Issue: Macrowine 2021

Type: Article

Authors

Gustavo Pereyra, Bruno Tisseyre, Milka FERRER

Biochemistry Laboratory, Department of Plant Biology, Facultad de Agronomía, Universidad de la República, Av. E. Garzón 780, CP 12900 Montevideo, Uruguay,

ITAP, Univ. of Montpellier, Institut Agro Montpellier, INRAE, Montpellier, France

Plant Production Department Universidad de la República, Av. E. Garzón 780, CP 12900 Montevideo, Uruguay

Contact the author

Keywords

water management; canopy vigor; lai; smartphone; precision viticulture; Vitis vinifera

Citation

Related articles…

Yeast derivatives: a promising alternative in wine oxidation prevention?

Oxidation processes constitute a main problem in winemaking. Oxidation result in color browning and varietal aroma loss, which are key attributes of wine organoleptic quality

Exploring the effect of oxygen exposure during malolactic fermentation on red wine color

this research investigates the impact of early oxygen exposure, also during malolactic fermentation (MLF), on pigments and color of a red wine from Sangiovese grapes

Zoning of the Veneto region areas with Denomination of origin

To characterize in depth the enological productions according to the origin territories and to provide modern tools for the qualitative raising of the assorted typologies of wine produced, Veneto Agricoltura (the regional agency for the agriculture, forestry and food industry development), the Regional Government of Veneto (north-eastern Italy) and various Consortia of Producers have undertaken since 2002 a systematic classification of the viticultural territories by agro-ecological zoning to achieve a strategic project aimed to set Veneto as the first Italian region to have completed in a systematic and scientifically rigorous way the zoning of most of its Denomination of Origin areas.

Upscaling the integrated terroir zoning through digital soil mapping: a case study in the Designation of Origin Campo de Borja

homogeneous zones by intersecting several partial zonings of major factors that influence vineyard growth. Each of them follows specific process from their corresponding disciplines. Soil zoning specifically refers to a Soil Resource Inventory map that has traditionally been generated by conventional soil mapping methods. These methods have shortcomings in reaching fine cartographic and categorical details and involve significant expenses, which undermines their applicability. A new framework named Digital Soil Mapping has introduced quantitative models by statistical techniques to establish soil-landscape relationships and is able to provide intensive scale cartography.

In the present study, a microzoning at 1:10.000 scale is generated from an initial zoning, where the conventional soil map with polytaxic map units is replaced by a new one from digital techniques that disaggregates them. The comparison between the zonings considers a quantitative evaluation of capability for each Homogeneous Terroir Unit by means of the Viticultural Quality Index and its categorization based on its distribution by map. The spatial intersection of both maps gives rise to a confusion matrix in which the flows of class variations after the substitution are assessed.

The results show a five-fold increase in the number of Homogeneous Terroir Units identified and a larger differentiation among them, evidenced by a wider range in the capability index distribution. Both elements are accompanied by an increase in the detection of areas of higher potential within previously undervalued uniform zones.These features are a direct effect of the improvements brought by Digital Soil Mapping techniques and would verify the advantages of their implementation in the Integrated Terroir zoning. Eventually, such new highly detailed terroir units would benefit precision viticulture and sustainable management practices.

Clone performance under different environmental conditions in California

Clonal evaluation of winegrapes in California has not been extensive. Early selection work by Alley (1977), Olmo (unpublished data) and Goheen (personal communication) resulted in the current collection