Productivité de la culture du sorgho ( Sorghum bicolor) dans un système agroforestier à base d’ Acacia senegal (L.) Willd. au Niger

Abstract

Objectives: Sahelian soils are characterized by low level of fertility whose improvement is done by the spreading of organic manure or artificial fertilizers. However, the economic constraints of households limit their adoption. Options not requiring any monetary exit like integration culture and the natural woody vegetation would constitute alternatives that are in adequacy with the socio-economic conditions of farmers. Methodology and results: The experimentation design is concentric crowns around the tree and one local variety of the sorghum. These results showed that it hasn’t significant difference of sorghum height between plants in out crown (223.68 cm) than in the crown (195.04 and 161.73 cm). The sorghum productivity both panicles and grains was statistically higher one the crown than out crown respectively 5279 kg.ha-1 against 4857 kg.ha-1 and 4303.1 kg.ha-1 against 3402.0 Kg.ha-1. Conclusion and application: The presence of A.senegal species in the fields created an agro-ecological environment that supports the sorghum production. These results are of practical interest because A. senegal-cultures association could be an alternative to the chemical inputs increasingly inaccessible to farmers.