Enhancing sweet potato crop irrigation sustainability through repurposed treated urban wastewater
DOI:
https://doi.org/10.5281/zenodo.16413193Palavras-chave:
agricultural yield, effluent application, soil nutrients, wastewater repurposingResumo
Introduction: This study, situated at Morón City's stabilization pond in Cuba's Ciego de Avila province. Objective: the viability of utilizing treated urban wastewater for sweet potato crop irrigation. Method: throgh the traditional furrow irrigation technique and the evaluation of the effects on the soil and the crop. Results: the research conducted 17 irrigation events, where 14 used effluents and 3 sourced groundwater. Additionally, five rainfall events complemented the irrigation sessions. Throughout the crop's growth cycle, it received a cumulative 5,906.91 m3 of water from the effluent application, supplemented by 2,109.61 m3 from groundwater and 2,272.50 m3 from effective precipitation. Remarkably, the commercial agricultural yield achieved an impressive 24.17 t·ha-1, well within the potential yield range for this clone. Assessment of the applied effluent revealed an electrical conductivity of 952.0 µS·cm-1 and a pH of 5.6, falling within permissible levels for agricultural crop development. Wastewater irrigation substantially augmented soil nutrient content, boosting P2O5 by 2.67 mg·100g-1, K2O by 15.05 mg·100g-1, and organic matter by 1.88 %. This corresponded to a significant nutrient influx, introducing 242.36 kg of P2O5 and 1,366.13 kg of K2O into the soil. Conclusion: This study unequivocally demonstrates the affirmative impacts of employing urban wastewater on soil quality and crop productivity. Not only did it elevate agricultural yield, but it also enriched the soil with vital nutrients while circumventing phytosanitary issues. By exemplifying sustainable water management and urban hydrology principles in agricultural practices, this research underlines their potential in fostering sustainable agriculture.
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