La Sécurisation de la production du maïs par l’utilisation du Banka sous trois pratiques de travail de sol dans le nord du Burkina Faso : Rendement et revenu net

Abstract

A field experiment was carried out a cross three consecutive years. The experiment was composed of runoff water harvesting, namely Banka, with two treated blocks: an irrigated block and a non-irrigated block. Each bloc has three replicates randomized soil tillage practices: T0 (Conventional tillage with flat bed), T1 (Magoye ripper), and T2 (zaï). Yields were evaluated by weighting the unit plot. The net income was computed for both irrigated and non-irrigated treatment by subtracting the gross income to the cost of investment. Results show that under no supplemental irrigation, treatment T2 shows a higher grain yield of 4782 kg ha⁻¹. Indeed, the lowest yield was 800 kg ha⁻¹, observed in T0. Supplemental irrigation improves grain yield from 32% to 63 % in 2016, whereas a surplus of 13 % to 110 % was observed in 2017 and 17 % to 33 % in 2018. T1 was the treatment that responded positively to supplemental irrigation with the highest grain and biomass of 4956 kg ha⁻¹ and 6138 kg ha⁻¹, respectively. The banka would be an alternative solution to ensure and improve maize production. However, the high cost of the banka construction did not allow it to gain a high net income.