National-scale spatial variations of soil phosphorus retention capacity in Brazil

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MetadadosDescriçãoIdioma
Autor(es): dc.creatorBarbosa, Julierme Zimmer-
Autor(es): dc.creatorPoggere, Giovana-
Autor(es): dc.creatorMancini, Marcelo-
Autor(es): dc.creatorSilva, Sérgio Henrique Godinho-
Autor(es): dc.creatorMotta, Antônio Carlos Vargas-
Autor(es): dc.creatorMarques, João José Granate de Sá e Melo-
Autor(es): dc.creatorCuri, Nilton-
Data de aceite: dc.date.accessioned2026-02-09T12:14:49Z-
Data de disponibilização: dc.date.available2026-02-09T12:14:49Z-
Data de envio: dc.date.issued2023-02-07-
Data de envio: dc.date.issued2023-02-07-
Data de envio: dc.date.issued2022-11-
Fonte completa do material: dc.identifierhttps://repositorio.ufla.br/handle/1/55972-
Fonte completa do material: dc.identifierhttps://www.sciencedirect.com/science/article/pii/S1474706522001644-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/capes/1157445-
Descrição: dc.descriptionPhosphorus (P) retention capacity of soils directly affects the management of phosphate fertilization, and has economic and environmental importance. Brazil has expressive agricultural production and high edaphoclimatic variability; still, the detailed spatial distribution of P retention capacity is not known. Thus, machine learning models were created to estimate the P retention capacity of soils at superficial horizons using the variables: clay content, sand content, soil organic matter, pH, base saturation. The four best models were combined to create an ensemble (a combination of models), which was applied in a dataset (5524 samples) that comprises a sample data from the entire Brazilian territory. The ensemble was used to build a map of P retention capacity. Most of the country presented soils with medium P retention (40–60%), and large areas with very high retention capacity were found in the south of Brazil, a subtropical region mostly associated with clayey soils. High P retention was observed for Histosols, probably related to humic-Al(Fe) complexes. Nitisol, Ferralsol, Gleysol and Cambisol classes presented high P retention, especially for clayey soils with qualifiers related to bases/weathering (Dystric) and organic matter (Umbric and Humic). The correlation between Fe oxide minerals and P retention varied with soil color and drainage conditions mainly associated to redoximorphic reactions; the same was not observed for Al oxide minerals. This pioneer study revealed the distribution of P retention capacity across different soil classes in Brazil, which can help to define land use suitability and soil P management strategies that ensure profitable agricultural exploration.-
Idioma: dc.languageen-
Publicador: dc.publisherElsevier-
Direitos: dc.rightsrestrictAccess-
???dc.source???: dc.sourcePhysics and Chemistry of the Earth-
Palavras-chave: dc.subjectPhosphate adsorption-
Palavras-chave: dc.subjectClay fraction-
Palavras-chave: dc.subjectMachine learning-
Palavras-chave: dc.subjectTop soil-
Palavras-chave: dc.subjectTropical soils-
Título: dc.titleNational-scale spatial variations of soil phosphorus retention capacity in Brazil-
Tipo de arquivo: dc.typeArtigo-
Aparece nas coleções:Repositório Institucional da Universidade Federal de Lavras (RIUFLA)

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