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Fonio Millet (Digitaria Exilis) Response to N, P and K fertilizers under varying climatic conditions in West Africa

Gigou Jacques, Stilmant Didier, Diallo Thierno Alimou, Cissé N., Sanogo Moussa D., Vaksmann Michel, Dupuis Brice. 2009. Fonio Millet (Digitaria Exilis) Response to N, P and K fertilizers under varying climatic conditions in West Africa. Experimental Agriculture, 45 (4) : 401-415.

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Quartile : Q3, Sujet : AGRONOMY

Résumé : Fonio millet (Digitaria exilis), a small-grained cereal, plays an important role in food security inWest Africa. As part of efforts to increase its productivity, we studied the effects of moderate levels of nitrogen (0, 15.0 and 30.0 kg N ha-1), phosphorus (0, 6.6 and 13.2 kg P ha?1) and potash (0, 12.5 and 25.0 kg K ha-1) fertilizers under varying climatic conditions. The three experimental sites at Bareng and Bordo in Guinea, and Cinzana in Mali, are representative of the distribution of fonio millet in West Africa. The average recorded grain yields were 1.51±}0.229, 1.08±}0.141 and 0.47±}0.182 t ha?1 in Bareng, Bordo and Cinzana, respectively. We observed a marginal to significant impact of N fertilization coupled, in Bordo, with a significant interaction with the P and K response. This interaction was highlighted by the limited effect of N without P or K fertilization or with the application of only one of these two major elements. Overall, N application as low as 15 kg ha?1 led to a 12-22% increase in production if the P and K applications were not limited. For better control over the risks associated with poor soil fertility and limited rainfall, it appeared to be more effective to apply moderate levels of N, P and K fertilizers to the fonio millet crop than a large amount of one of these nutrients.

Mots-clés Agrovoc : Digitaria exilis, engrais NPK, fertilisation, rendement des cultures, grain, paille, facteur édaphique, facteur climatique, conditions météorologiques

Mots-clés géographiques Agrovoc : Guinée, Mali

Classification Agris : F04 - Fertilisation
P40 - Météorologie et climatologie

Champ stratégique Cirad : Axe 1 (2005-2013) - Intensification écologique

Auteurs et affiliations

  • Gigou Jacques, IRAG (GIN)
  • Stilmant Didier, CRA-W (BEL)
  • Diallo Thierno Alimou, IRAG (GIN)
  • Cissé N., IRAG (GIN)
  • Sanogo Moussa D., IER (MLI)
  • Vaksmann Michel, CIRAD-BIOS-UPR AIVA (MLI) ORCID: 0000-0002-5258-1279
  • Dupuis Brice, CRA-W (BEL)

Source : Cirad - Agritrop (https://agritrop.cirad.fr/574043/)

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