Monitoring and Mapping Vineyard Water Status Using Non-Invasive Technologies by a Ground Robot

There is a growing need to provide support and applicable tools to farmers and the agro-industry in order to move from their traditional water status monitoring and high-water-demand cropping and irrigation practices to modern, more precise, reduced-demand systems and technologies. In precision viti...

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Main Authors: Juan Fernández-Novales, Verónica Saiz-Rubio, Ignacio Barrio, Francisco Rovira-Más, Andrés Cuenca-Cuenca, Fernando Santos Alves, Joana Valente, Javier Tardaguila, María Paz Diago
Format: Article
Language:English
Published: MDPI AG 2021-07-01
Series:Remote Sensing
Subjects:
Online Access:https://www.mdpi.com/2072-4292/13/14/2830
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author Juan Fernández-Novales
Verónica Saiz-Rubio
Ignacio Barrio
Francisco Rovira-Más
Andrés Cuenca-Cuenca
Fernando Santos Alves
Joana Valente
Javier Tardaguila
María Paz Diago
author_facet Juan Fernández-Novales
Verónica Saiz-Rubio
Ignacio Barrio
Francisco Rovira-Más
Andrés Cuenca-Cuenca
Fernando Santos Alves
Joana Valente
Javier Tardaguila
María Paz Diago
author_sort Juan Fernández-Novales
collection DOAJ
description There is a growing need to provide support and applicable tools to farmers and the agro-industry in order to move from their traditional water status monitoring and high-water-demand cropping and irrigation practices to modern, more precise, reduced-demand systems and technologies. In precision viticulture, very few approaches with ground robots have served as moving platforms for carrying non-invasive sensors to deliver field maps that help growers in decision making. The goal of this work is to demonstrate the capability of the VineScout (developed in the context of a H2020 EU project), a ground robot designed to assess and map vineyard water status using thermal infrared radiometry in commercial vineyards. The trials were carried out in Douro Superior (Portugal) under different irrigation treatments during seasons 2019 and 2020. Grapevines of <i>Vitis vinifera</i> L. Touriga Nacional were monitored at different timings of the day using leaf water potential (<b>Ψ</b><sub>l</sub>) as reference indicators of plant water status. Grapevines’ canopy temperature (T<sub>c</sub>) values, recorded with an infrared radiometer, as well as data acquired with an environmental sensor (T<sub>air</sub>, RH, and AP) and NDVI measurements collected with a multispectral sensor were automatically saved in the computer of the autonomous robot to assess and map the spatial variability of a commercial vineyard water status. Calibration and prediction models were performed using Partial Least Squares (PLS) regression. The best prediction models for grapevine water status yielded a determination coefficient of cross-validation (r<sup>2</sup><sub>cv</sub>) of 0.57 in the morning time and a r<sup>2</sup><sub>cv</sub> of 0.42 in the midday. The root mean square error of cross-validation (RMSE<sub>cv</sub>) was 0.191 MPa and 0.139 MPa at morning and midday, respectively. Spatial–temporal variation maps were developed at two different times of the day to illustrate the capability to monitor the grapevine water status in order to reduce the consumption of water, implementing appropriate irrigation strategies and increase the efficiency in the real time vineyard management. The promising outcomes gathered with the VineScout using different sensors based on thermography, multispectral imaging and environmental data disclose the need for further studies considering new variables related with the plant water status, and more grapevine cultivars, seasons and locations to improve the accuracy, robustness and reliability of the predictive models, in the context of precision and sustainable viticulture.
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spelling doaj.art-94793c825f58489cb2eed4374d79893c2023-11-22T04:53:03ZengMDPI AGRemote Sensing2072-42922021-07-011314283010.3390/rs13142830Monitoring and Mapping Vineyard Water Status Using Non-Invasive Technologies by a Ground RobotJuan Fernández-Novales0Verónica Saiz-Rubio1Ignacio Barrio2Francisco Rovira-Más3Andrés Cuenca-Cuenca4Fernando Santos Alves5Joana Valente6Javier Tardaguila7María Paz Diago8Televitis Research Group, University of La Rioja, 26006 Logroño, SpainAgricultural Robotics Laboratory (ARL), Universitat Politècnica de València, Camino de Vera, s/n., 46022 Valencia, SpainTelevitis Research Group, University of La Rioja, 26006 Logroño, SpainAgricultural Robotics Laboratory (ARL), Universitat Politècnica de València, Camino de Vera, s/n., 46022 Valencia, SpainAgricultural Robotics Laboratory (ARL), Universitat Politècnica de València, Camino de Vera, s/n., 46022 Valencia, SpainSymington Family Estates, Vinhos SA, Travessa Barão de Forrester 86, 4431-901 Vila Nova de Gaia, PortugalSymington Family Estates, Vinhos SA, Travessa Barão de Forrester 86, 4431-901 Vila Nova de Gaia, PortugalTelevitis Research Group, University of La Rioja, 26006 Logroño, SpainTelevitis Research Group, University of La Rioja, 26006 Logroño, SpainThere is a growing need to provide support and applicable tools to farmers and the agro-industry in order to move from their traditional water status monitoring and high-water-demand cropping and irrigation practices to modern, more precise, reduced-demand systems and technologies. In precision viticulture, very few approaches with ground robots have served as moving platforms for carrying non-invasive sensors to deliver field maps that help growers in decision making. The goal of this work is to demonstrate the capability of the VineScout (developed in the context of a H2020 EU project), a ground robot designed to assess and map vineyard water status using thermal infrared radiometry in commercial vineyards. The trials were carried out in Douro Superior (Portugal) under different irrigation treatments during seasons 2019 and 2020. Grapevines of <i>Vitis vinifera</i> L. Touriga Nacional were monitored at different timings of the day using leaf water potential (<b>Ψ</b><sub>l</sub>) as reference indicators of plant water status. Grapevines’ canopy temperature (T<sub>c</sub>) values, recorded with an infrared radiometer, as well as data acquired with an environmental sensor (T<sub>air</sub>, RH, and AP) and NDVI measurements collected with a multispectral sensor were automatically saved in the computer of the autonomous robot to assess and map the spatial variability of a commercial vineyard water status. Calibration and prediction models were performed using Partial Least Squares (PLS) regression. The best prediction models for grapevine water status yielded a determination coefficient of cross-validation (r<sup>2</sup><sub>cv</sub>) of 0.57 in the morning time and a r<sup>2</sup><sub>cv</sub> of 0.42 in the midday. The root mean square error of cross-validation (RMSE<sub>cv</sub>) was 0.191 MPa and 0.139 MPa at morning and midday, respectively. Spatial–temporal variation maps were developed at two different times of the day to illustrate the capability to monitor the grapevine water status in order to reduce the consumption of water, implementing appropriate irrigation strategies and increase the efficiency in the real time vineyard management. The promising outcomes gathered with the VineScout using different sensors based on thermography, multispectral imaging and environmental data disclose the need for further studies considering new variables related with the plant water status, and more grapevine cultivars, seasons and locations to improve the accuracy, robustness and reliability of the predictive models, in the context of precision and sustainable viticulture.https://www.mdpi.com/2072-4292/13/14/2830agricultural roboticsnon-invasive proximal sensingwater stresschemometricsprecision viticulture
spellingShingle Juan Fernández-Novales
Verónica Saiz-Rubio
Ignacio Barrio
Francisco Rovira-Más
Andrés Cuenca-Cuenca
Fernando Santos Alves
Joana Valente
Javier Tardaguila
María Paz Diago
Monitoring and Mapping Vineyard Water Status Using Non-Invasive Technologies by a Ground Robot
Remote Sensing
agricultural robotics
non-invasive proximal sensing
water stress
chemometrics
precision viticulture
title Monitoring and Mapping Vineyard Water Status Using Non-Invasive Technologies by a Ground Robot
title_full Monitoring and Mapping Vineyard Water Status Using Non-Invasive Technologies by a Ground Robot
title_fullStr Monitoring and Mapping Vineyard Water Status Using Non-Invasive Technologies by a Ground Robot
title_full_unstemmed Monitoring and Mapping Vineyard Water Status Using Non-Invasive Technologies by a Ground Robot
title_short Monitoring and Mapping Vineyard Water Status Using Non-Invasive Technologies by a Ground Robot
title_sort monitoring and mapping vineyard water status using non invasive technologies by a ground robot
topic agricultural robotics
non-invasive proximal sensing
water stress
chemometrics
precision viticulture
url https://www.mdpi.com/2072-4292/13/14/2830
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