Yield of cowpea fertilized with cassava wastewater - DOI: 10.7127/rbai.v1701283

Resumo

Wastewater has been studied in agriculture as a source of nutrients for plants as well as its efficiency, mainly in arid and semiarid regions. In this context, this study aimed to evaluate the yield of cowpea genotype MNCO3-737F-5-1 cultivated in soil fertilized with cassava wastewater. The experiment was a completely randomized design, consisting of six treatments of cassava wastewater and five replicates (0.00; 22.50; 45.00; 90.00; 180.00 and 360.00 m3 ha-1). The following variables were evaluated at 60 days after sowing: leaf fresh phytomass (LFP) stem fresh phytomass (SFP), pod fresh phytomass (PFP), leaf dry phytomass (LDP), stem dry phytomass (SDP), pod dry phytomass (PDP), number of pods (NP) and weight of 50 dry grains (W50). The best results of weight of 50 dry grains, leaf fresh phytomass and leaf dry phytomass were obtained under 90.00 m3 ha-1 of cassava wastewater, and the highest number of pods (10.03) under a dose of 50.00 m3 ha-1 of cassava wastewater. High doses of cassava wastewater negatively affect the yield of cowpea.