Carbon, nitrogen, and physical fractions of organic matter in recovered pastures of the Maranhense Amazon

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dc.creatorCarlos Augusto Rocha de Moraes Rego
dc.creatorPaulo Sérgio Rabello de Oliveira
dc.creatorJean Sérgio Rosset
dc.creatorLuciano Cavalcante Muniz
dc.creatorEloisa Mattei
dc.creatorVictor Roberto Ribeiro Reis
dc.creatorBruna Penha Costa
dc.creatorWallace Ribeiro Nunes
dc.date2023
dc.date.accessioned2026-07-07T03:52:03Z
dc.descriptionIn Maranhão State, Brazil, soils are naturally acidic, nutrient-deficient, and prone to cohesion and erosion. Removing the natural cover to establish pastures causes physical, chemical, and biological changes in the soil. Therefore, this study aimed to evaluate the contents and stocks of carbon (C), nitrogen (N), and particle-size fractions of soil organic matter (SOM) in pastures with different years of recovery, and compare them with a secondary forest in the Legal Amazon. Four treatments were evaluated: secondary forest, perennial pasture, and perennial pastures recovered for five years and eight years, both of the latter through corn + brachiaria intercropping. The contents and stocks of total organic carbon, total nitrogen, C, and N from the soil organic matter particle-size fractions, as well as the carbon management indexes (CMI) of the 0.00-0.10, 0.10-0.20, 0.20-0.30, and 0.30-0.40 m layers were evaluated. The perennial pasture environment presented the highest total soil C and N contents; however, when observing the granulometric fractions and CMI, these increases were qualitative in relation to the secondary forest. Pasture recovery over eight years contributed to an improvement of soil quality similar to secondary forest, indicating that an increase in SOM quality, quantity, and recovery time related to increased pasture capacity to accumulate C and N in the soil.
dc.formatapplication/pdf
dc.identifier1679-9275
dc.identifierhttps://www.redalyc.org/articulo.oa?id=303075473055
dc.identifierhttps://www.redalyc.org/journal/3030/303075473055/
dc.identifierhttps://www.redalyc.org/journal/3030/303075473055/html/
dc.identifierhttps://www.redalyc.org/journal/3030/303075473055/303075473055.epub
dc.identifierhttps://www.redalyc.org/journal/3030/303075473055/movil
dc.identifier10.4025/actasciagron.v45i1.60794
dc.identifier.urihttp://hdl.handle.net/123456789/445396
dc.languageen
dc.publisherUniversidade Estadual de Maringá
dc.relationhttp://www.redalyc.org/revista.oa?id=3030
dc.rightsActa Scientiarum. Agronomy
dc.sourceActa Scientiarum. Agronomy (Brasil) Vol.45
dc.subjectAgrociencias
dc.titleCarbon, nitrogen, and physical fractions of organic matter in recovered pastures of the Maranhense Amazon
dc.typeartículo científico

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