Mineral Fertilizer Use for Optimal Groundnut Production in the Sudano-Guinean and Sudanian Zones of Benin

Abstract

This study aims to determine the optimal N, P, K, Mg and Zn rates for groundnut production on Ferric and Plintic Luvisol in the Sudano-Guinean and Sudanian zones of Benin Republic. Two years (2018 and 2019) experiment was carried out in the municipality of Ouessè in the Sudano-Guinean zone and Bembèrèkè in the Sudanian zone. The tested nutrient doses were N (0, 20 and 40 kg•ha −1), P (0, 25 and 50 kg•ha −1), K (0, 20 and 40 kg•ha −1), Mg (0, 15 and 30 kg•ha −1) and Zn (0, 4 and 8 kg•ha −1). The Box and Behnken rotating design is used to define the N, P, K, Mg and Zn rate combinations leading to 46 combinations. A completely randomized bloc design was setting up considering farmers as replication. In total, four farmers' fields were selected. A one-way analysis of variance is carried out on yield data, using the linear mixed-effect model. Response surface analyses were used to determine the optimal doses for each N, P, K, Mg and Zn. Nodule production (6.5 times higher than the control), number of gynophores (2.8 times higher than the control) and root length (19.2 ± 0.2 cm) of groundnut plants were significantly (p = 0.0001) improved with nutrient application. The response surface analysis shows that treatments N-P-K-Mg-Zn of 16.

Efficiences agronomiques et nutritionnelles suite à l’apport d’engrais aux plants d’anacardier (<i>Anacardium occidentale L.</i>) au Bénin

“…Cependant, dans un contexte d'agriculture durable, l'on ne doit pas se limiter à une simple recommandation d'engrais aux cultures mais plutôt à l'optimisation de l'utilisation des éléments minéraux par les cultures (Malcolm, 2011). La non-utilisation ou l'utilisation non équilibrée, inadéquate ou excessive des engrais est l'une des causes majeures de la faiblesse des rendements obtenue dans la plus part des pays africains (Dobermann, 2007 ;Chabi et al, 2021).…”