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24-h variation in soil respiration after a long dry season in a Sudano-Sahelian region

Yemadje Pierrot Lionel, Guibert Hervé, Blavet Didier, Olina Jean-Paul, Chevallier Tiphaine, Deleporte Philippe, Bernoux Martial. 2015. 24-h variation in soil respiration after a long dry season in a Sudano-Sahelian region. Scientia Agrícola, 72 (5) : pp. 452-458.

Journal article ; Article de recherche ; Article de revue à facteur d'impact Revue en libre accès total
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Quartile : Q2, Sujet : AGRICULTURE, MULTIDISCIPLINARY

Abstract : Soil respiration is a major component of the global carbon cycle which links ecosystems and the atmosphere. To evaluate the reaction of soil respiration after wetting, during a dry period, soil respiration and associated environmental factors were measured over a 24-h period, during the dry season in North Cameroon after wetting the soil. Over 24-h, soil respiration rates followed a quadratic curve during the day coming close to linear at night, while soil temperature and moisture together explained at least 73 % of the variations during the 24-h observed. These soil respiration rates increased during the morning, peaked between 11h00 and 13h00 and then decreased gradually to the minimum around 06h00. These observations were used to propose a method for estimating mean daytime and nighttime soil respiration after wetting the soil. The method proposed in this study has the advantage of being based on a small number of measurements and is, therefore, easier to implement for monitoring 24-h soil respiration after the first rains following a long dry period. (Résumé d'auteur)

Mots-clés Agrovoc : Matière organique du sol, Saison sèche, Respiration du sol, Température du sol, Teneur en eau du sol, Méthodologie, Cycle du carbone

Mots-clés géographiques Agrovoc : Sahel, Cameroun, Zone soudano-sahélienne

Classification Agris : P33 - Soil chemistry and physics
P40 - Meteorology and climatology

Champ stratégique Cirad : Axe 6 (2014-2018) - Sociétés, natures et territoires

Auteurs et affiliations

  • Yemadje Pierrot Lionel, CIRAD-PERSYST-UPR AIDA (FRA)
  • Guibert Hervé, CIRAD-PERSYST-UPR AIDA (FRA)
  • Blavet Didier, IRD (FRA)
  • Olina Jean-Paul, IRAD (CMR)
  • Chevallier Tiphaine, IRD (FRA)
  • Deleporte Philippe, CIRAD-PERSYST-UMR Eco&Sols (FRA)
  • Bernoux Martial, IRD (BRA)

Source : Cirad-Agritrop (https://agritrop.cirad.fr/577979/)

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