Dynamics of potassium released from sewage sludge biochar fertilizers in soil

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Autor(es): dc.contributorUniversity of Brasilia, Faculty of Agronomy and Veterinary Medicine-
Autor(es): dc.creatorNgo Ndoung, Ornelle Christiane-
Autor(es): dc.creatorSouza, Ludmila Raulino de-
Autor(es): dc.creatorFachini, Joisman-
Autor(es): dc.creatorLeão, Tairone Paiva-
Autor(es): dc.creatorSandri, Delvio-
Autor(es): dc.creatorFigueiredo, Cícero Célio de-
Data de aceite: dc.date.accessioned2024-10-23T16:29:17Z-
Data de disponibilização: dc.date.available2024-10-23T16:29:17Z-
Data de envio: dc.date.issued2024-06-19-
Data de envio: dc.date.issued2024-06-19-
Data de envio: dc.date.issued2023-09-22-
Fonte completa do material: dc.identifierhttp://repositorio2.unb.br/jspui/handle/10482/48330-
Fonte completa do material: dc.identifierhttps://doi.org/10.1016/j.jenvman.2023.119057-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/capes/909738-
Descrição: dc.descriptionThe 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.-
Descrição: dc.descriptionFaculdade de Agronomia e Medicina Veterinária (FAV)-
Idioma: dc.languageen-
Publicador: dc.publisherElsevier Ltd.-
Relação: dc.relationhttps://www.sciencedirect.com/science/article/pii/S0301479723018455?via%3Dihub-
Direitos: dc.rightsAcesso Restrito-
Palavras-chave: dc.subjectBiochar-
Palavras-chave: dc.subjectLodo de esgoto-
Palavras-chave: dc.subjectFertilizantes-
Palavras-chave: dc.subjectPotássio-
Título: dc.titleDynamics of potassium released from sewage sludge biochar fertilizers in soil-
Tipo de arquivo: dc.typelivro digital-
Aparece nas coleções:Repositório Institucional – UNB

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