Étude de la durabilité économique et environnementale de la production de manioc sur ferralsols

Abstract

Objective: To evaluate the components of the sustainability of cassava cropping systems that rely on alley cropping.
Methodology and results: The study consisted to cultivate improved cassava ( Yavo ) / green soybeans ( Mung Bean) / Gliricidia sepium with a basal dressing ( NPK [ 20: 36 : 36] or chicken manure [10 t / ha] ) compared to the traditional system consisting of a local variety of cassava and peanut intercropping on ferralsols. The sum of the new factors of production allowed a significant increase in the food output. In addition to bean production, organic manure and, potentially, fuel wood from G. sepium, the yield of cassava of the introduced variety Yavo was 40 t/ha compared to 13 t/ha in the traditional. The plant architecture of the new systems allowed a good soil cover, thus reducing the frequency of weeding, done traditionally by women. Conversely, workload for men increased. The new system was also economically viable.
Conclusion and application of findings: As a whole, the suggested system appears to have a potential to contribute to agronomic, environmental, economic and social sustainability. The new systems could be recommended for the intensification of the cassava crop.

Keywords: cassava, Gliricidia sepium, green soya, ferralsol, sustainability.