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Objectifs : Les sols saheliens se caracterisent par un faible niveau de fertilite dont l'amelioration se fait par l'epandage de fumier organique ou d'engrais. Cependant, les contraintes economiques des menages limitent leur adoption. Des options ne necessitant aucune sortie monetaire notamment l'integration a la culture de la vegetation ligneuse naturelle constitueraient des alternatives plus en adequation avec les conditions socio-economiques des paysans. Methodologie et resultats : Le dispositif experimental est en couronnes concentriques autour de l’arbre et d’une variete locale du sorgho. Les resultats de cette etude ont montre que la hauteur des plants du sorgho a maturite ne presente pas de differences significatives qu’ils soient hors houppier (223,68cm) que sous houppier (195,04 et 161,73cm). Quant a la productivite du sorgho, tant en panicules qu’en grains, a ete statistiquement plus elevee sous houppier que hors houppier respectivement 5279 Kg.ha -1 contre 4857 kg.ha -1 et 4303,1 Kg.ha -1 contre 3402,0 Kg.ha -1 . Conclusion et application : la presence de l'espece A. senegal dans les champs de cultures a cree un environnement agro-ecologique favorable a la production du sorgho. Les resultats obtenus presentent un interet pratique car l’association A. senegal-cultures pourrait etre une alternative aux intrants chimiques de plus en plus inaccessibles aux paysans. Mots cles : Acacia senegal, sorgho, interaction, croissance, productivite, Niger 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. Key words: Acacia senegal , sorghum, interaction, growth, productivity, Niger

journal of applied biosciences

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