Seasonal dynamics of chemical soil properties under native Brazil-nut (Bertholletia Excelsa) groves in the Tapajós National Forest, brazilian Amazon.

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dc.contributorRAIMUNDO COSME DE OLIVEIRA JUNIOR, CPATU; QUÊZIA LEANDRO DE MOURA, UNIVERSIDADE FEDERAL RURAL DA AMAZÔNIA; PATRICIA DA COSTA, CNPMA; NAGIB JORGE MELEM JUNIOR, CPAF-AP; MARCELINO CARNEIRO GUEDES, CPAF-AP; DARLISSON BENTES DOS SANTOS; BRENDA LOHANA TEIXEIRA DE MORAES, SELO VERDE AMBIENTAL; AMANDA FABRÍCIA LEÃO MOTA, SECRETARIA DE ESTADO DE MEIO AMBIENTE E SUSTENTABILIDADE DO PARÁ.
dc.creatorOLIVEIRA JUNIOR, R. C. de
dc.creatorMOURA, Q. L. de
dc.creatorCOSTA, P. da
dc.creatorMELEM JUNIOR, N. J.
dc.creatorGUEDES, M. C.
dc.creatorSANTOS, D. B. dos
dc.creatorMORAES, B. L. T. de
dc.creatorMOTA, A. F. L.
dc.date2026-02-25T07:21:19Z
dc.date2026-02-25T07:21:19Z
dc.date2026-02-24
dc.date2026
dc.date.accessioned2026-06-30T23:54:56Z
dc.descriptionSeasonal fluctuations in soil chemical properties play a central role in regulating biogeochemical processes and fertility in Amazonian forests. This study evaluated how rainy and dry seasons influence soil organic carbon (C), total nitrogen (N), and pH under native Bertholletia excelsa groves in the Tapajós National Forest, Pará, Brazil. Thirty soil samples (0–20 cm) were collected during each season and analyzed individually using standardized laboratory procedures and appropriate statistical tests. Significant seasonal differences were detected for C (p = 0.0001) and N (p = 0.013), whereas pH remained stable across periods (p > 0.05). Organic carbon increased markedly during the dry season, reflecting the accumulation of partially decomposed litter and humic substances under reduced moisture and slower decomposition. In contrast, total nitrogen decreased slightly but significantly, suggesting enhanced microbial immobilization during drought. Together, these patterns indicate that hydrological seasonality modulates the balance between nutrient release in the wet season and organic matter preservation in the dry season. From a management perspective, maintaining litter cover and minimizing soil disturbance during the dry season are essential to sustaining nutrient retention, soil structure, and ecosystem resilience. By integrating seasonal contrasts in C, N, and pH, this study provides empirical evidence of the mechanisms governing nutrient dynamics in soils beneath native Brazil-nut trees, advancing the understanding of biogeochemical functioning and offering a basis for sustainable management of Amazonian extractive systems.
dc.identifierCaderno Pedagógico, v. 23, n. 1, e22983, 2026.
dc.identifierhttp://www.alice.cnptia.embrapa.br/alice/handle/doc/1184641
dc.identifierhttps://doi.org/10.54033/cadpedv23n1-216
dc.identifier.urihttp://hdl.handle.net/123456789/393142
dc.languageeng
dc.rightsopenAccess
dc.subjectSazonalidade
dc.subjectFloresta Amazonia
dc.subjectCarbono organico
dc.subjectNitrogênio total
dc.subjectCiclagem biogeoquímica
dc.subjectSolo
dc.subjectQuímica do Solo
dc.subjectNitrogênio
dc.subjectCarbono
dc.subjectBertholletia Excelsa
dc.subjectFloresta Tropical
dc.titleSeasonal dynamics of chemical soil properties under native Brazil-nut (Bertholletia Excelsa) groves in the Tapajós National Forest, brazilian Amazon.
dc.typeArtigo de periódico

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