Valorization of various sources of rabbit manure in agropiscicultural system in Benin (West Africa): dynamics and effect of mineralization upon quality of fresh water

Purpose Rising demand of fish generates various pressureson aquatic ecosystems, causing its deterioration and theloss of its biodiversity. With the aim of a better managementand fish production in a salubrious environment, thisstudy proposes the utilization of organic fertilizers fromrabbit manure.Methods The treatments consisted of manure of rabbits fedwith: manufactured diet (T1), improved diet with Ipomeaaquatic (T2), improved diet with Elaeis guineensis (T3),and improved diet with Panicum maximum (T4). Indeed,experimental design was a completely randomized blockdesign with three replications. 6 g in 10 L of water fromthe different manures from each diet was followed during50 days. Various nutrients were measured.Results After the mineralization process, the best manurewhich released more nutrients was T4 with measured proportionsof N-NO2-, N-NO3-, N-NH3, P-PO43-, Ca2 ,Mg2 , K , and suspended matter being 0.06 ± 0.0,0.38 ± 0.1, 0.85 ± 0.1, 8.27 ± 0.9, 12.11 ± 0.8, 4.47 ±0.3, 3.02 ± 0.2, and 140.78 ± 18.6 mg/L, respectively.The highest content of phosphorus and nitrogen wasrecorded in T4 and T2, respectively. The principal componentanalysis showed a positive correlation betweenP-PO43-, Ca2 , Mg2 , MES, conductivity, and salinityduring mineralization.Conclusion Manure from rabbits fed by an improved dietwith P. maximum (T4) was recommended for agro-pisciculturalproduction system.