Dynamics of potassium released from sewage sludge biochar fertilizers in soil

Ngo Ndoung, Ornelle Christiane; Souza, Ludmila Raulino de; Fachini, Joisman; Leão, Tairone Paiva; Sandri, Delvio; Figueiredo, Cícero Célio de

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Campo DC	Valor	Idioma
dc.contributor.author	Ngo Ndoung, Ornelle Christiane	-
dc.contributor.author	Souza, Ludmila Raulino de	-
dc.contributor.author	Fachini, Joisman	-
dc.contributor.author	Leão, Tairone Paiva	-
dc.contributor.author	Sandri, Delvio	-
dc.contributor.author	Figueiredo, Cícero Célio de	-
dc.date.accessioned	2024-06-19T14:42:31Z	-
dc.date.available	2024-06-19T14:42:31Z	-
dc.date.issued	2023-09-22	-
dc.identifier.citation	NGO NDOUNG, Ornelle Christiane et al. Dynamics of potassium released from sewage sludge biochar fertilizers in soi. Journal of Environmental Management, v. 346, 119057, 15 nov. 2023. DOI: https://doi.org/10.1016/j.jenvman.2023.119057.	pt_BR
dc.identifier.uri	http://repositorio2.unb.br/jspui/handle/10482/48330	-
dc.language.iso	eng	pt_BR
dc.publisher	Elsevier Ltd.	pt_BR
dc.rights	Acesso Restrito	pt_BR
dc.title	Dynamics of potassium released from sewage sludge biochar fertilizers in soil	pt_BR
dc.type	Artigo	pt_BR
dc.subject.keyword	Biochar	pt_BR
dc.subject.keyword	Lodo de esgoto	pt_BR
dc.subject.keyword	Fertilizantes	pt_BR
dc.subject.keyword	Potássio	pt_BR
dc.identifier.doi	https://doi.org/10.1016/j.jenvman.2023.119057	pt_BR
dc.relation.publisherversion	https://www.sciencedirect.com/science/article/pii/S0301479723018455?via%3Dihub	pt_BR
dc.description.abstract1	The solid product of sewage sludge (SS) pyrolysis, called SS biochar (SSB), is rich in carbon and nutrients, such as phosphorus (P), nitrogen (N), calcium (Ca), and zinc (Zn). However, SSB has a low potassium (K) concentration because it is released with water during the final stage of sewage treatment. The enrichment of SSB with mineral sources of K can solve the low supply of K in SSB and produce an organomineral fertilizer with a slow release of K. However, the dynamics of K release from these enriched fertilizers in different soil types remain unclear. This study investigated the dynamics of K release from biochar-based fertilizer (BBF) in the form of pellets and granules in two soil types (clayey and sandy) and natural silica. An incubation experiment was conducted for 60 days, and replicates were evaluated at prescribed time intervals. After the incubation period, the levels of K available in the solid fraction were determined, and the dynamics of K release were evaluated using four nonlinear regression models. BBFs achieved a slower release of K than the mineral KCl. The dynamics of K release were affected by the physical form of BBF, such that the pelleted BBF exhibited the slowest K release. Furthermore, regarding the concentration detected in the solid phase, the total released was highest in clayey soil, followed by sandy soil and natural silica. The enriched BBFs reduced K release throughout the experimental period, behaving as slow-release fertilizers with the potential to optimize K uptake by plants throughout the growth cycle. Further studies are required to evaluate K leaching and retention in the soil profile when biochar based fertilizers are applied.	pt_BR
dc.contributor.affiliation	University of Brasilia, Faculty of Agronomy and Veterinary Medicine	pt_BR
dc.description.unidade	Faculdade de Agronomia e Medicina Veterinária (FAV)	pt_BR
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