Terroir 2012 banner
IVES 9 IVES Conference Series 9 Precision viticulture: using on-board sensors to map vine variability and characterize vine trajectories

Precision viticulture: using on-board sensors to map vine variability and characterize vine trajectories

Abstract

Precision viticulture consists in using ICT (Information and Communication Technology) to implement more specific and better targeted technical vine practices. With proxy-detection, precision viticulture mobilizes on-board sensors, computers, and GNSS positioning. Three sensors were embedded on a tractor and tested on a plot with three champagne grape varieties. This plot is located at the Plumecoq experimental vineyard (CIVC, Champagne, France). The first sensor is a pruning wood sensor (Physiocap) designed and developed by CIVC. Physiocap is used during dormancy season to characterize vine architecture by measuring shoot vigor, shoot number and biomass. The other two are growing season sensors. GreenSeeker Trimble provides a vegetative vine index by measuring foliage porosity. Multiplex Force-A characterizes vine metabolism through chlorophyll, anthocyanin, flavonol, and nitrogen leaf content. Data from these sensors define the physiological state of the vine at the time of measure. The sensors can also map spatial vine variability within a plot or between plots. To understand the vineyard as a whole, the combination of biomass indexes and leaf contents is interesting. In this case, there was some good correlation between the indexes and yield and must compounds such as nitrogen, acidity or sugar. By collecting sensor data at several key stages, it is possible to plot vine trajectories. Vine trajectory describes the physiological developments made by the vineyard according to its initial potential. It depends on annual climatic conditions and physical environment. Vine trajectories are useful to understand the effect of year and terroir.

Download the PDF

DOI:

Publication date: October 1, 2020

Issue: Terroir 2012

Type: Article

Authors

Sébastien DEBUISSON, Manon MORLET, Claire GERMAIN, Olivier GARCIA, Laurent PANIGAÏ, Dominique MONCOMBLE

Comité Interprofessionnel du Vin de Champagne (CIVC)

Contact the author

Keywords

Precision viticulture, vine trajectory, multiplex, NDVI, Pruning wood sensor

Tags

IVES Conference Series | Terroir 2012

Citation

Related articles…

Phenolic extraction during fermentation as affected by ripeness level of Syrah/R99 grapes

L’extraction phénolique au cours de la fermentation à partir de vendanges de différents degrees de maturité du cépage Syrah/R99 a été etudiée. Cette travail fait parti d’un projet focalisé sur la qualité du raisin et des vins obtenus au cours du millésime 2002. Les vignes sont situées à Stellenbosch (Afrique du Sud) sur un sol Glenrose

Read More

Within-vineyard variability in grape composition at the estate scale can be assessed through machine-learning modeling of plant water status in space and time. A case study from the hills of Adelaida District AVA, Paso Robles, CA, USA

Aim: Through machine-learning modelling of plant water status from environmental characteristics, this work aims to develop a model able to predict grape phenolic composition in space and time to guide selective harvest decisions at the estate scale.

Read More

Response of red grape varieties irrigated during the summer to water availability at the end of winter in four Spanish wine-growing regions: berry phenolic composition

Water availability is the most limiting factor for vineyard productivity under Mediterranean conditions. Due to the effects caused by the current climate change, wine-growing regions may face serious soil moisture conservation problems, due to the lower water retention capacity of the soil and higher soil irradiation. The aim of this work was to evaluate the effects of soil recharge irrigation in pre-sprouting and summer irrigation every week (30 % ETo) from the pea size state until the end of ripening (RP) compared to exclusively summer irrigation every week (R) in the same way that RP, on berry phenolic composition at harvest.

Read More

Influence of climatic conditions on grape composition of Tempranillo in La Mancha DO (Spain)

The aim of this work was to analyze the variability in grape composition of the Tempranillo cultivar related to climatic conditions, in La Mancha Designation of Origin. Grape composition (sugar content, total acidity, pH, malic acid, and total and extractable anthocyanins) recorded during ripening, were analysed for the period 2000-2019. The weather conditions at daily time scale, recorded during the same period, were also evaluated. The relationships between grape parameters with climatic variables related to temperature and to water deficits, referring different periods between phenological events along the growing cycle, were evaluated using regression analysis. High variability in grape composition was observed in the period analysed. Total acidity varied between 3.7 and 7.3 gL-1 while malic acid varied between 1.2 and 4 gL-1. The extractable anthocyanins ranged between 526 and 972 mgL-1, and total anthocyanins ranged between 922 and 1388 mgL-1, being the lowest values recorded in the hottest year (2017). Total acidity decreased 0.77 gL-1 for an increase of 100 GDD, while malic acid decrease in 0.42 gL-1 for the same GDD increase, being the period between veraison and harvest the one that seemed to have higher influence on acidity. In addition, it was confirmed that increasing water deficits decreased acidity. Total and extractable anthocyanins increased in about 210 and 105 mgL-1, respectively, with an increase of 100 GDD from veraison to harvest, and the increase in water deficits favour the increase of anthocyanins, both total and extractable anthocyanins. Total and extractable anthocyanins concentration increased in 35 and 22 mgL-1 per an increase of 10 mm in the water deficit. These results can be of interest to understand the potential changes that grapes composition may suffer under future warmer climates.

Read More

Impact of water stress on the phenolic composition of cv. Merlot grapes, in a typical terroir of the La Mancha region (Spain)

The study was carried out in 2006 with Merlot grapes from vines grown using the trellis system, where four treatments were compared with different levels of water stress.

Read More