Aménagement en courbes de niveau, increasing rainfall capture, storage, and drainage in soils of Mali

Kablan Richard A., Yost Russell S., Brannan Kevin, Doumbia Mamadou D., Traoré Kalifa B., Yoroté Abdouramane, Toloba Youssouf, Sissoko Salifou, Samaké Oumar, Vaksmann Michel, Dioni Lasana, Sissoko Mankan. 2008. Aménagement en courbes de niveau, increasing rainfall capture, storage, and drainage in soils of Mali. Arid Land Research and Management, 22 (1) : 62-80.

Résumé : Food security is a concern in many parts of the tropics, but it is an acute problem in a band of countries bordering the Sahara desert on the southSub-Saharan Africa. Crop productivity and production, stability, and resilience to adverse events seem to be diminishing with time. Low productivity is related to both adverse soil conditions and insufficient rainfall amounts and distribution. Portions of the region receive substantial amounts of rainfall, yet much is lost during intense storms. A rainfall capturing technology HAménagement en courbes de niveau" (A CN), a variant of closely spaced, narrow-base terraces, has been developed in Mali and has proven beneficial in several West Afiican countries. A field where ACN had been installed was instrumented to quantify the effects of ACN on soil/water availability. Capacitance probes were installed to 160 cm so that soil moisture measurements could easily be taken two to three times a week during 2 years-2003 and 2004. Soil moisture profiles indicated that substantially more water was retained in soils where the ACN technology was installed than where it was not present. The ACN technology led to increased soil moisture during the first month of rains. However, the differences in soil moisture were greatest at the end of the rainy season when soil moisture of the subsoil was much greater wbere the ACN technology had been implemented. Moisture contents were jreater in the soil profile 80-160 cm with values ranging 0.18-.21 cm3 cm- compared to 0.15 in the No-ACN plots.

Mots-clés Agrovoc : zone aride, eau de pluie, travail du sol en billon, gestion des eaux, culture en courbe de niveau, aménagement du paysage, aménagement de bassin versant, drainage souterrain, eau souterraine, Gossypium, teneur en eau du sol

Mots-clés géographiques Agrovoc : Mali

Classification Agris : F07 - Façons culturales
P11 - Drainage
P10 - Ressources en eau et leur gestion

Champ stratégique Cirad : Axe 1 (2005-2013) - Intensification écologique

Auteurs et affiliations

• Kablan Richard A., University of Hawaii (USA)
• Yost Russell S., University of Hawaii (USA)
• Brannan Kevin, Virginia Polytechnic Institute and State University (USA)
• Doumbia Mamadou D., IER (MLI)
• Traoré Kalifa B., IER (MLI)
• Yoroté Abdouramane, IER (MLI)
• Toloba Youssouf, IER (MLI)
• Sissoko Salifou, IER (MLI)
• Samaké Oumar, IER (MLI)
• Vaksmann Michel, CIRAD-CA-UPR Agrobiodiversité en savane (MLI) ORCID: 0000-0002-5258-1279
• Dioni Lasana, ICAFE (CRI)
• Sissoko Mankan

Source : Cirad - Agritrop (https://agritrop.cirad.fr/550520/)

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