Simulation of leaf temperature variability within a row-cotton crop : Toward a useful tool to improve water status monitoring using thermal infrared

Luquet Delphine, Bégué Agnès, Vidal Alain, Dauzat Jean, Clouvel Pascal. 2001. Simulation of leaf temperature variability within a row-cotton crop : Toward a useful tool to improve water status monitoring using thermal infrared. In : Third European Conference on Precision Agriculture, Montpellier, France, 12-20 June 2001. vol. 1. Ed. G. Grenier and S. Blackmore. Montpellier : ENSAM, 247-252. European conference on precision agriculture. 3, Montpellier, France, 18 Juin 2001/20 Juin 2001.

Autre titre : Simulation de la variabilité de la température foliaire au sein d'une parcelle de cotonniers en rangs : vers un outil opérationnel pour améliorer le suivi de l'état hydrique grâce à l'infrarouge thermique

Résumé : Modeling tools take an increasing place in the field of water supply monitoring investigations. A energy balance model, based on the 3-D description of plants at leaf level, is used to simulate cotton crop leaves temperature variability according to crop water status (Dauzat el al., 2001, In press). Model validation gives good results for homogeneous canopies. For heterogeneous crops, a systematic underestimation is observed, due to strong thermal soil effects. Also, the model is being implemented with a bare soil compartment to account for soil temperature and heart exchanges with the crop. Once validated, this approach will permit to interpret accurately crop temperature variability, to better estimate water status. Hence, it will be possible to test the Iimits of existing crop water status indexes based on temperature measurement, and determine the ways to be investigated to improve or perform such techniques.

Mots-clés Agrovoc : Gossypium, bilan hydrique, température, feuille, rayonnement infrarouge, rayonnement thermique, bilan énergétique, modèle de simulation

Classification Agris : U30 - Méthodes de recherche
F40 - Écologie végétale
U10 - Informatique, mathématiques et statistiques

Auteurs et affiliations

• Luquet Delphine, CIRAD-AMIS-AGRONOMIE (FRA) ORCID: 0000-0002-2543-7140
• Bégué Agnès, CIRAD-AMIS-AGRONOMIE (FRA)
• Vidal Alain, International Programme for Technology and Research in Irrigation and Drainage (ITA)
• Dauzat Jean, CIRAD-AMIS-AMAP (FRA)
• Clouvel Pascal, CIRAD-CA-COTON (FRA)

Source : Cirad - Agritrop (https://agritrop.cirad.fr/479822/)

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