Functional N-cycle genes in soil and N2O emissions in tropical grass-maize intercropping systems

Registro completo de metadados
MetadadosDescriçãoIdioma
Autor(es): dc.contributorUniversidade Estadual Paulista (UNESP)-
Autor(es): dc.contributorUniversidade de São Paulo (USP)-
Autor(es): dc.contributorFederal University of Lavras-
Autor(es): dc.creatorGrassmann, Camila S.-
Autor(es): dc.creatorMariano, Eduardo-
Autor(es): dc.creatorDiniz, Priscila P.-
Autor(es): dc.creatorBorges, Beatriz M.F.-
Autor(es): dc.creatorBorges, Clovis D.-
Autor(es): dc.creatorTsai, Siu M.-
Autor(es): dc.creatorRosolem, Ciro A.-
Data de aceite: dc.date.accessioned2025-08-21T22:48:48Z-
Data de disponibilização: dc.date.available2025-08-21T22:48:48Z-
Data de envio: dc.date.issued2022-04-28-
Data de envio: dc.date.issued2022-04-28-
Data de envio: dc.date.issued2022-06-01-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.1016/j.soilbio.2022.108655-
Fonte completa do material: dc.identifierhttp://hdl.handle.net/11449/223785-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/223785-
Descrição: dc.descriptionThere is evidence that forage grasses such as Megathyrsus and Urochloa can suppress nitrification, with direct or indirect consequences on soil inorganic N dynamics and nitrous oxide (N2O) emissions. However, the influence of soil chemical properties on the dynamics of functional N-genes and losses of N in maize (Zea mays L.) intercropped with forage grasses under N fertilization is poorly understood. In this study, soil samples and N2O emissions were analyzed from a field experiment in which maize (fertilized or not with ammonium-based fertilizer) was intercropped with Guinea grass (M. maximus cv. Tanzânia), palisade grass (U. brizantha cv. Marandu), and ruzigrass (U. ruziziensis cv. Comum). Soil N-cycle microorganisms [16S rRNA of bacteria and archaea, nifH (gene encoding N2-fixing bacteria), ammonia-oxidizing bacteria (AOB) and archaea (AOA), nirS (encoding nitrite reductase), and nosZ (encoding nitrous oxide reductase)] were influenced by forage grass, N fertilization, and sampling time, but no evidence of biological nitrification inhibition was found. Palisade grass was associated with a higher abundance of nifH (7.0 × 105 gene copies g−1 soil, on average) in the absence of N compared with the other grasses (4.3 × 105 gene copies g−1 soil, on average). Nitrogen fertilization increased the abundance of AOB but not AOA. Furthermore, N2O flux was influenced by AOB, water-filled pore space, and N fertilization, whereas the cumulative N2O emission and fertilizer-induced emission factor (0.36%, on average) were not affected by the grasses. In conclusion, this study reveals the strong dominance of AOB under ammonium supply, potentially stimulating N2O emissions in maize-forage grass intercropping systems.-
Descrição: dc.descriptionCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)-
Descrição: dc.descriptionCastle Studies Group-
Descrição: dc.descriptionASCRS Research Foundation-
Descrição: dc.descriptionFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)-
Descrição: dc.descriptionConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)-
Descrição: dc.descriptionBiotechnology and Biological Sciences Research Council-
Descrição: dc.descriptionCollege of Agricultural Sciences São Paulo State University, Av. Universitária, 3780, SP-
Descrição: dc.descriptionCenter for Nuclear Energy in Agriculture University of São Paulo, Av. Centenário, 303, SP-
Descrição: dc.descriptionFederal University of Lavras, MG-
Descrição: dc.descriptionCollege of Agricultural Sciences São Paulo State University, Av. Universitária, 3780, SP-
Descrição: dc.descriptionASCRS Research Foundation: 2015-10267001479-
Descrição: dc.descriptionASCRS Research Foundation: 2015/50305-8-
Descrição: dc.descriptionFAPESP: 2016/25253-7-
Descrição: dc.descriptionFAPESP: 2017/02517-1-
Descrição: dc.descriptionCNPq: 309134/2020-0-
Descrição: dc.descriptionCNPq: 311008/2016-0-
Descrição: dc.descriptionBiotechnology and Biological Sciences Research Council: BB/N013201/1-
Descrição: dc.descriptionASCRS Research Foundation: RCUK-02771/16-
Idioma: dc.languageen-
Relação: dc.relationSoil Biology and Biochemistry-
???dc.source???: dc.sourceScopus-
Palavras-chave: dc.subjectBiological nitrification inhibition-
Palavras-chave: dc.subjectMegathyrsus-
Palavras-chave: dc.subjectN fertilization-
Palavras-chave: dc.subjectqPCR-
Palavras-chave: dc.subjectUrochloa-
Palavras-chave: dc.subjectZea mays L.-
Título: dc.titleFunctional N-cycle genes in soil and N2O emissions in tropical grass-maize intercropping systems-
Tipo de arquivo: dc.typelivro digital-
Aparece nas coleções:Repositório Institucional - Unesp

Não existem arquivos associados a este item.