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Effects of soil redox potential (Eh) and pH on growth of sunflower and wheat

Cottes Jérémy, Saquet Alix, Palayret Ludovic, Husson Olivier, Beghin Robin, Allen Deonie, Scheiner Javier, Cabanes Cédric, Guiresse Maritxu. 2020. Effects of soil redox potential (Eh) and pH on growth of sunflower and wheat. Archives of Agronomy and Soil Science, 66 (4) : pp. 473-487.

Journal article ; Article de recherche ; Article de revue à facteur d'impact
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Abstract : Soil redox potential (Eh) and pH are fundamentals parameters for plants growth. Measuring soil Eh is essential but complex due to the lack of measurement reliability resulting from high temporal variability and metrological challenges. This paper proposes practical advancements for measuring Eh in aerobic soils using combined electrodes (improvements in methodology specific to cleaning electrodes, measurement time, cleaning the dataset). The study of soil Eh and pH on sunflower and wheat in pot experiments has highlighted the relationship between Ehcumul (Eh associated with a dimension of time) and the portion of porosity that is accessible to air. For reduced soil conditions, sunflower positively reacts to better aeration. Strong correlations exist between the duration of each potential range and the growth of sunflower. The study of sunflower growth in soil reveals extremely harmful impact resulting from too high and/or too low Eh values.

Mots-clés Agrovoc : Helianthus annuus, Triticum durum, Potentiel redox, pH du sol, Physique du sol, Électrode

Mots-clés géographiques Agrovoc : France, Midi-Pyrénées

Mots-clés complémentaires : Croissance des plantes

Mots-clés libres : Redox potential, Measurement, Plant

Classification Agris : F62 - Plant physiology - Growth and development
P33 - Soil chemistry and physics

Champ stratégique Cirad : CTS 2 (2019-) - Transitions agroécologiques

Auteurs et affiliations

  • Cottes Jérémy, Université de Toulouse (FRA) - auteur correspondant
  • Saquet Alix, CNRS (FRA)
  • Palayret Ludovic, CNRS (FRA)
  • Husson Olivier, CIRAD-PERSYST-UPR AIDA (FRA) ORCID: 0000-0001-9587-5819
  • Beghin Robin, INPT (FRA)
  • Allen Deonie, Université de Toulouse (FRA)
  • Scheiner Javier, Université de Toulouse (FRA)
  • Cabanes Cédric, Agronutrition (FRA)
  • Guiresse Maritxu, INPT (FRA)

Source : Cirad-Agritrop (https://agritrop.cirad.fr/592688/)

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