Carte de recommandation d’engrais specifique au site pour la production intensive de maïs en zone sud soudanienne du Burkina Faso

Abstract

Intensification of maize (Zea mays L) production in Burkina Faso requires adequate fertilisation on suitable soils. The objective of this study was to develop a decision support tool for fertiliser recommendations for maize production in the southern Sudanian zone of Burkina Faso using the Information and Decision Support System (IDSS) model. Data on costs per unit of fertiliser were calculated using local market prices in Burkina Faso. The selling price of grain maize was estimated for a period from harvest to June at US$ 0,263. Ten fertilisation options, including a control and the recommended extension rate were tested the Massongo maize variety. The results showed that 80N-30P-40K, 120N-30P-40K, 60N-10P-12K (recommended rate) and the no-fertiliser control were efficient, depending on soil characteristics. Application of efficient fertiliser rates allowed the area covered by grain yields greater than 3000 kg ha^-1 to increase from 39.23% of soil units with the extension rate to 62.33%. Application of efficient fertiliser rates increased the area covered by grain yields above 3 000 kg ha-1 from 39.23% of soil units with the extension rate to 62.33%. Also, yields between 3 144 and 4 630 kg ha^-1, with gross margins between US$ 557,322 ha^-1 and US$ 898,098 ha^-1 were obtained. These maps are decision support tools for maize production and can be used as a reference for the development and/or updating of other fertiliser recommendation maps.