24-h variation in soil respiration after a long dry season in a Sudano-Sahelian region
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.
| Main Authors: | , , , , , , |
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| Format: | article biblioteca |
| Language: | eng |
| Subjects: | P33 - Chimie et physique du sol, P40 - Météorologie et climatologie, matière organique du sol, saison sèche, respiration du sol, température du sol, teneur en eau du sol, méthodologie, cycle du carbone, http://aims.fao.org/aos/agrovoc/c_35657, http://aims.fao.org/aos/agrovoc/c_2400, http://aims.fao.org/aos/agrovoc/c_33553, http://aims.fao.org/aos/agrovoc/c_7197, http://aims.fao.org/aos/agrovoc/c_7208, http://aims.fao.org/aos/agrovoc/c_12522, http://aims.fao.org/aos/agrovoc/c_17299, http://aims.fao.org/aos/agrovoc/c_6734, http://aims.fao.org/aos/agrovoc/c_1229, http://aims.fao.org/aos/agrovoc/c_32605, |
| Online Access: | http://agritrop.cirad.fr/577979/ http://agritrop.cirad.fr/577979/1/Yemadje%20et%20al%202015.pdf |
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