Impact De La Variabilité Pluviométrique Sur La Saison Culturale Dans La Zone De Production Cotonnière En Côte d’Ivoire

  • Charles Sékpa Dekoula Université Félix Houphouët-Boigny, Laboratoire de Sciences et Techniques de l’Eau et de l’Environnement (LSTEE), Côte d’Ivoire
  • Brou Kouame Centre National de Recherche Agronomique (CNRA) Laboratoire Central Sols, Eaux et Plantes, Programme Gestion Durable des Sols et Maîtrise de l’Eau, Programme coton, Côte d’Ivoire
  • Emmanuel Kouadio N’goran Centre National de Recherche Agronomique (CNRA) Laboratoire Central Sols, Eaux et Plantes, Programme Gestion Durable des Sols et Maîtrise de l’Eau, Programme coton, Côte d’Ivoire
  • Fernand Guy Yao Centre National de Recherche Agronomique (CNRA) Laboratoire Central Sols, Eaux et Plantes, Programme Gestion Durable des Sols et Maîtrise de l’Eau, Programme coton, Côte d’Ivoire
  • Jean-Noël Ehounou Université Félix Houphouët-Boigny, Laboratoire de Sciences et Techniques de l’Eau et de l’Environnement (LSTEE), Côte d’Ivoire
  • Nagnin Soro Université Félix Houphouët-Boigny, Laboratoire de Sciences et Techniques de l’Eau et de l’Environnement (LSTEE), Côte d’Ivoire

Abstract

In Côte d’Ivoire, agriculture is mostly rain-fed. As a result, changes and variations of climate have considerable impacts on crops production including cotton production. This paper focuses on analyzing the effects of rainfall variations on the cropping season (useful rain season) of cotton in cotton production area of Côte d’Ivoire. A set of stationarity tests was applied to the Nicholson index using rainfall data of the period 1950-2000. Then, from a frequency analyses, the variability of rainfall and characteristic parameters of the cropping season was evaluated in terms of risks. The result shows a general downward trend of rainfall in the cotton growing area with years of breaks between 1964 and 1975. Moreover, spatial evolution of the cropping season parameters is a function of latitude. After the years of breaks, the beginning and the end of the cotton cropping season, which became respectively later and earlier, indicated that the length of useful rain season became shorter. The deficits of seasonal rainfall accumulations vary up to 60%. It is therefore necessary to update the crop calendar by taking into account variability of parameters of the useful rain season.

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Published
2018-04-30
How to Cite
Dekoula, C. S., Kouame, B., N’goran, E. K., Yao, F. G., Ehounou, J.-N., & Soro, N. (2018). Impact De La Variabilité Pluviométrique Sur La Saison Culturale Dans La Zone De Production Cotonnière En Côte d’Ivoire. European Scientific Journal, ESJ, 14(12), 143. https://doi.org/10.19044/esj.2018.v14n12p143