Soil organic C affected by dry‐season management of no‐till soybean crop rotations in the tropics

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MetadadosDescriçãoIdioma
Autor(es): dc.contributorUniversidade Estadual Paulista (Unesp)-
Autor(es): dc.contributorUSDA Agricultural Research Service-
Autor(es): dc.creatorRigon, João Paulo Gonsiorkiewicz [UNESP]-
Autor(es): dc.creatorCalonego, Juliano Carlos [UNESP]-
Autor(es): dc.creatorCapuani, Silvia [UNESP]-
Autor(es): dc.creatorFranzluebbers, Alan J.-
Data de aceite: dc.date.accessioned2022-02-22T00:45:48Z-
Data de disponibilização: dc.date.available2022-02-22T00:45:48Z-
Data de envio: dc.date.issued2021-06-25-
Data de envio: dc.date.issued2021-06-25-
Data de envio: dc.date.issued2020-12-31-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.1007/s11104-021-04878-0-
Fonte completa do material: dc.identifierhttp://hdl.handle.net/11449/205970-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/205970-
Descrição: dc.descriptionAims: Cover crop species selection for soybean (Glycine max) production under no-tillage (NT) management may affect soil organic C sequestration by altering the quantity and quality of C inputs, thereby affecting cropping system sustainability. If so, the underlying mechanisms for such regulation are still unclear. Methods: We assessed changes in soil C and N fractions at 0-0.1 m depth and soil C stock at 0-0.6 m depth during the last three years of dry-season cover cropping in a soybean production system managed with NT for 9 years on a Rhodic Hapludox in Sao Paulo, Brazil. Dry-season management treatments were repeated yearly in a split-plot scheme. Main plots during the fall-winter were (1) ruzigrass (Urochloa ruziziensis), (2) grain sorghum (Sorghum bicolor), and (3) the intercropping of ruzigrass and sorghum. Subplots during spring prior to planting soybean were (a) pearl millet (Pennisetum glaucum), (b) sunn hemp (Crotalaria juncea), and (c) forage sorghum (Sorghum bicolor). Results: Soil C and N fractions were affected according to crop residue characteristics of the rotations. Higher soil C stocks in 2012 and 2015 (7 % an average) were observed at 0.2–0.4 m depth by ruzigrass compared to sorghum. High crop residue input with ruzigrass in the fall-winter sequestered 0.61 Mg C ha− 1 yr− 1 at 0-0.1 m soil depth compared with lower C sequestration using grain sorghum (0.29 Mg C ha− 1 yr− 1). Conclusions: The quantity and quality of crop residues impact its retention on soil surface controlling the dynamics of soil C and N fractions and can be considered relevant for soil C sequestration. These aspects could contribute to the mitigation of atmospheric CO2 in crop production systems.-
Descrição: dc.descriptionDepartment of Crop Science College of Agricultural Sciences Sao Paulo State University UNESP, 3780, Avenida Universitaria-
Descrição: dc.descriptionDepartment of Soil Science College of Agricultural Sciences Sao Paulo State University UNESP, 3780, Avenida Universitaria-
Descrição: dc.descriptionDepartment of Crop and Soil Sciences at North Carolina State University USDA Agricultural Research Service-
Descrição: dc.descriptionDepartment of Crop Science College of Agricultural Sciences Sao Paulo State University UNESP, 3780, Avenida Universitaria-
Descrição: dc.descriptionDepartment of Soil Science College of Agricultural Sciences Sao Paulo State University UNESP, 3780, Avenida Universitaria-
Idioma: dc.languageen-
Relação: dc.relationPlant and Soil-
???dc.source???: dc.sourceScopus-
Palavras-chave: dc.subjectConservation management-
Palavras-chave: dc.subjectCrop residue quality-
Palavras-chave: dc.subjectCropping systems-
Palavras-chave: dc.subjectSoil carbon stock-
Título: dc.titleSoil organic C affected by dry‐season management of no‐till soybean crop rotations in the tropics-
Tipo de arquivo: dc.typelivro digital-
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