Autfray Patrice, Oliver Robert.
2001. N available for maize (Zea mais) on living cover crops of Chromolaena odorata and Pueraria phaseoloides in forest areas of Côte d'Ivoire.
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 : Chromolaena odorata, a wild species, and Pueraria phaseoloides, an introduced species, were compared as fallow plants over 6 and 18 month periods, in a permanent annual sequence with a 4-month maize (Zea mais) cropping cycle. On average, P. phaseoloides restored more N than C. odorata (145 kg ha-1 compared to 87 for 6-month fallows, and 245 kg ha-1 compared to 178 for 18-month fallows). Short-term P. phaseoloides fallows promoted nitrogen mineralization by soil and N uptake (N export from grain maize, restoration via maize mulch). Cropping systems with 18- month live fallowed plant cover were not more productive than the slash-and-burn control with C. odorata cover. After 4 years, organic N supplies in the surface horizon declined for systems with 6-month fallows, and were generally higher with C. odorata cover.
Mots-clés Agrovoc : Zea mays, Chromolaena odorata, Pueraria phaseoloides, azote, plante de couverture, minéralisation, système jachère, jachère
Mots-clés géographiques Agrovoc : Côte d'Ivoire
Classification Agris : F08 - Systèmes et modes de culture
Auteurs et affiliations
- Autfray Patrice, CIRAD-CA-GEC (MYT)
- Oliver Robert, CIRAD-AMIS-AGRONOMIE (FRA)
Autres liens de la publication
Source : Cirad - Agritrop (https://agritrop.cirad.fr/513173/)
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