MPACTS OF SPATIAL VARIABILITY OF LANDUSE ON WIND EROSION AND NUTRIMENTS TRANSPORTS IN BANIZOUMBOU (SOUTH-WEST OF NIGER)

ABDOURHAMANE TOURÉ Amadou; TIDJANI Adamou Didie; RAJOT Jean-Louis; BOUET Christel; GARBA Zibo; MARTICORENA Béatric; AMBOUTA Karimou Jean-Marie

ABDOURHAMANE TOURÉ Amadou Université Abdou Moumouni de Niamey, Faculté de sciences et techniques, Département de Géologie, Niamey, Niger
TIDJANI Adamou Didie IMPACTS OF SPATIAL VARIABILITY OF LANDUSE ON WIND EROSION AND NUTRIMENTS TRANSPORTS IN BANIZOUMBOU (SOUTH-WEST OF NIGER)
RAJOT Jean-Louis EES-Paris UMR IRD 242-CNRS, UPMC, UPEC, INRA, France, (4)LISA, UMR CNRS 7583, UPEC, UPD, IPSL, Créteil, France,
BOUET Christel EES-Paris UMR IRD 242-CNRS, UPMC, UPEC, INRA, France,
GARBA Zibo Université Abdou Moumouni de Niamey, Faculté de sciences et techniques
MARTICORENA Béatric LISA, UMR CNRS 7583, UPEC, UPD, IPSL, Créteil, France,
AMBOUTA Karimou Jean-Marie )Université Abdou Moumouni de Niamey Faculté d’Agronomie, Niamey, Niger

Keywords: Niger, wind erosion, soil usage, nutrients, flux

Abstract

ind erosion makes soils and nutrients losses in the Sahel. At south Niger, wind erosionis the main factor of the environmental degradation. The landscape of this area is a juxtaposition of field and follow of different age. This work aimed to quantify wind erosion fluxes and nutrient transferin relation of soil usage during an entire season. Thus it appeared that wind erosion had an important role in the soil fertility restauration of the old follow (Pi). This follow emitted respectively near of 7 and 3 times less of flux than field (Pc) and youth follow (Pj). Besides, the amount of exchangeable bases on the old follow (2,669 Mèq/100g) wassuperior toon field (2,085 Mèq/100g) and youth follow (2 Mèq/100g). This is particularlylinked to the trapping of particlesand exchangeablebases transported since the surfaces more sensibleto wind erosion (field and youth follow) by the vegetation cover of the old follow