Scopel Eric, Findeling Antoine.
2001. Conservation tillage impact on rainfed maize production in semi-arid zones of western Mexico. Importance of runoff reduction.
In : Conservation agriculture, a worldwide challenge : Ist World congress on conservation agriculture. Garcia-Torres Luis (ed.), Benites José (ed.), Martinez-Vilela Armando (ed.). ECAF, FAO
Résumé : To try to explain the spectacular results obtained by conservation tillage (CT) in the western semi-arid zone of Mexico, using even a small amount of residue as a mulch (2 t/ha), the mechanisms involved in water dynamics in the soil-mulch-plant system were analysed carefully. Runoff is the principal mechanism involved, as CT decreases runoff losses by 30 to 65% in a stable way, throughout the crop cycle. In the short run (cycle scale), small residue heaps act as a succession of barriers giving the water more time to infiltrate. In the long run (~5 years), conservation tillage, by impeding crust formation, leads to infiltration rates up to 10 times higher on average than under traditional tillage. In total, available water during the crop cycle can be increased by 30% under conservation tillage, ensuring a big advantage for maize production. Studies have shown the potential merits of this technique even for Mexican dry zones.
Mots-clés Agrovoc : Zea mays, travail du sol de conservation, zone semi-aride, mulch, ruissellement, bilan hydrique, culture pluviale, mouvement de l'eau dans le sol
Mots-clés géographiques Agrovoc : Mexique
Classification Agris : P36 - Érosion, conservation et récupération des sols
F07 - Façons culturales
Auteurs et affiliations
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Scopel Eric, CIRAD-CA-GEC (BRA)
ORCID: 0000-0003-2938-6587
- Findeling Antoine, CIRAD-CA-GEC (FRA)
Autres liens de la publication
Source : Cirad - Agritrop (https://agritrop.cirad.fr/507495/)
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