Effects of Poultry Litter and the Residues of Maggot’s Production on Chemical Fertility of a Lixisol and Maize (zea Mays L.) Yield in Western of Burkina Faso.

Organic substrates have shown their importance in the sustainable management of soil fertility and crops production. A study was conducted during 2 years (2016 and 2017) at western of Burkina Faso to evaluate the effects of poultry litter (PL) and the residues of maggots’ production (RMP) on soil chemical fertility and maize yield. The experimental design was a completely randomized block design with nine treatments and three replications. The treatments in 2016 included : T0 : natural soil fertility (control) ; T1 = NPK (375 g/25 m2) + Urea (125 g/25 m2) ; T2 = PL (5000 g/25 m2) ;T3 = RMP (5000 g/25 m2) ; T4 = PL (2500 g/25 m2) + RMP (2500 g/25 m2) ; T5 = PL (5000 g/25 m2) + NPK (187.5 g/25 m2) + Urea (62.5 g/25 m2) ; T6 = RMP (5000 g/25 m2) + NPK (187.5 g/25 m2) + Urea (62.5 g/25 m2) ; T7 = PL (2500 g/25 m2) + RMP (2500 g/25 m2) + NPK (187.5 g/25 m2) + Urea (62.5 g/25 m2) ; T8 = PL (2500 g/25 m2) + RMP (2500 g/25 m2) + NPK (375 g/25 m2) + Urea (125 g/25 m2). In 2017, the same treatments received only NPK (187.5 g/25 m²) and urea (62.5 g/25 m²). Data collection concerned soil, pHH2O, pHKCl, total carbon (C), total nitrogen (N), total phosphorus (P-total), total potassium (K-total), available phosphorus (P-ass) and exchangeable potassium (K-ex). Crop measurement concerned maize grain and maize straw yields. The results show that organic substrates didn’t have a significant effect on soil chemical parameters during 2016 cropping season. However, the treatment T6 has increased significantly (P < 0.05) maize yield during 2016 cropping season to 84 and 38 % compared to T0 and T1 respectively. Moreover, the treatment T6 induced a significant rear effect during the 2017 season on soil C, N, K-total and K-ex and C/N ratio. It was concluded that RMP could be considered as organic substrates which have a great agronomic value and could help to reduce mineral fertilizer quantity.