Soil organic carbon as a key predictor of N in forest soils of Brazil

Registro completo de metadados
MetadadosDescriçãoIdioma
Autor(es): dc.creatorCalazans, Silas O. L.-
Autor(es): dc.creatorMorais, Vinicius A.-
Autor(es): dc.creatorScolforo, José R.S.-
Autor(es): dc.creatorZinn, Yuri L.-
Autor(es): dc.creatorMello, José M.-
Autor(es): dc.creatorMancini, Luana T.-
Autor(es): dc.creatorSilva, Carlos A.-
Data de aceite: dc.date.accessioned2026-02-09T12:27:18Z-
Data de disponibilização: dc.date.available2026-02-09T12:27:18Z-
Data de envio: dc.date.issued2018-06-11-
Data de envio: dc.date.issued2018-06-11-
Data de envio: dc.date.issued2018-04-
Fonte completa do material: dc.identifierhttps://repositorio.ufla.br/handle/1/29398-
Fonte completa do material: dc.identifierhttps://link.springer.com/article/10.1007/s11368-016-1557-4-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/capes/1161668-
Descrição: dc.descriptionPurpose Despite the ancillary knowledge that soil N is chiefly retained as soil organic matter, little is known about how it is affected by other soil and environmental factors, especially in the tropics. In this study, we performed a comprehensive survey of soils under native vegetation in Minas Gerais, Brazil, aiming to (a) measure soil Kjeldahl-N concentrations to a 1-m depth, (b) identify the main affecting factors of soil N retention, and (c) predict N through soil profile based on organic C (SOC) and its main conditioning factors. Materials and methods Soils under 36 fragments of native forest and savanna were sampled at five depths (0–10, 10–20, 20–40, 40–60, and 60–100 cm) and characterized by physical and chemical analyses, including total N determined by the micro-Kjeldahl method. Single and multivariate regressions were used to predict N concentrations based on soil properties and climatic factors. Results and discussion The average N concentrations ranged between 0.12 and 7.54 g kg−1, decreasing with depth, and can be predicted using SOC concentrations (R 2 = 0.86). Multivariate regressions using more input data, namely texture, cation exchange capacity (CEC), and altitude increased slightly R 2 values (0.68–0.90) for separate soil depths, but not for the whole dataset (R 2 = 0.85). Conclusions We demonstrated that N can be adequately predicted based on SOC concentrations, for any depth and forest type. The implications of the stable SOC/N relation and their coupled cycles and the environmental factors affecting N retention in Brazilian weathered soils are further discussed.-
Idioma: dc.languageen-
Publicador: dc.publisherSpringer-
Direitos: dc.rightsrestrictAccess-
???dc.source???: dc.sourceJournal of Soils and Sediments-
Palavras-chave: dc.subjectSoil texture-
Palavras-chave: dc.subjectPedotransfer functions-
Palavras-chave: dc.subjectWeathered Brazilian soils-
Palavras-chave: dc.subjectC and N soil cycles-
Palavras-chave: dc.subjectTextura do solo-
Palavras-chave: dc.subjectFunções de pedotransferência-
Palavras-chave: dc.subjectSolos brasileiros resistentes-
Palavras-chave: dc.subjectC e N ciclos de solo-
Título: dc.titleSoil organic carbon as a key predictor of N in forest soils of Brazil-
Tipo de arquivo: dc.typeArtigo-
Aparece nas coleções:Repositório Institucional da Universidade Federal de Lavras (RIUFLA)

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