Please use this identifier to cite or link to this item: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1185575
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dc.contributor.authorRODDRIGUES, N. E.
dc.contributor.authorOLIVEIRA JUNIOR, R. C. de
dc.contributor.authorSANTOS, D. B.
dc.contributor.authorOLIVEIRA, D. R.
dc.date.accessioned2026-03-18T17:29:42Z-
dc.date.available2026-03-18T17:29:42Z-
dc.date.created2026-03-18
dc.date.issued2026
dc.identifier.citationAmbiente e Água: An Interdisciplinary Journal of Applied Science, v. 21, e3115, 2026.
dc.identifier.issn1980-993X.
dc.identifier.urihttp://www.alice.cnptia.embrapa.br/alice/handle/doc/1185575-
dc.descriptionThis study evaluated mineral nitrogen (NH₄⁺ and NO₃⁻) concentrations and potential mineralization and nitrification rates in soils under No-Tillage (NT) and Conventional Tillage (CT) in soybean fields in the Santarém Plateau, Pará, Brazil. Soil samples were collected at three phenological stages (R1: flowering; R5: grain filling; R8: physiological maturity) and four depths (0 – 10, 10 – 20, 20 – 30, 30 – 40 cm). No significant differences were observed between NT and CT for mineral N concentrations or transformation rates, suggesting that after two years of NT adoption, short-term effects on N dynamics are minimal. Mineral N concentrations decreased significantly (p< 0.05) from R1 to R8, mainly in deeper layers (10 – 40 cm), likely due to intense N uptake by soybean during early reproductive stages. The highest daily mineralization and nitrification rates occurred in the 0 – 10 cm layer, associated with greater organic matter and microbial activity. Positive transformation rates at all depths indicate continuous conversion of organic N into plant-available forms throughout the crop cycle. Results suggest that NT benefits on soil N cycling in Amazonian agricultural systems may become more evident over longer adoption periods, particularly when integrated with crop rotation and permanent soil cover.
dc.language.isopor
dc.rightsopenAccess
dc.subjectCiclagem
dc.subjectAgricultura tropical
dc.subjectAmônio
dc.subjectSistemas de manejo agrícola
dc.titleMineral nitrogen dynamics, mineralization and nitrification in soybean fields under No-Tillage and conventional tillage in Amazonian tropical soils.
dc.typeArtigo de periódico
dc.subject.thesagroNitrato
riaa.ainfo.id1185575
riaa.ainfo.lastupdate2026-03-18
dc.identifier.doihttps://doi.org/10.4136/ambi-agua.3115
dc.contributor.institutionNIELI ELOINE RODDRIGUES, UNIVERSIDADE FEDERAL DO OESTE DO PARÁ; RAIMUNDO COSME DE OLIVEIRA JUNIOR, CPATU; DARLISSON BENTES SANTOS; DANIEL ROCHA OLIVEIRA, AGÊNCIA DE DEFESA AGROPECUÁRIA DO ESTADO DO PARÁ.
Appears in Collections:Artigo em periódico indexado (CPATU)

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