Please use this identifier to cite or link to this item: http://www.alice.cnptia.embrapa.br/alice/handle/doc/964556
Title: Nitrogen fluxes from irrigated common-bean as affected by mulching and mineral fertilization.
Authors: CARVALHO, M. T. de M.
MADARI, B. E.
LEAL, W. G. de O.
COSTA, A. R. da
MACHADO, P. L. O. de A.
SILVEIRA, P. M. da
MOREIRA, J. A. A.
HEINEMANN, A. B.
Affiliation: MARCIA THAIS DE MELO CARVALHO, CNPAF; BEATA EMOKE MADARI, CNPAF; WESLEY GABRIEL DE OLIVEIRA LEAL, CNPAF; ADRIANA RODOLFO DA COSTA, UEG; PEDRO LUIZ OLIVEIRA DE A MACHADO, CNPAF; PEDRO MARQUES DA SILVEIRA, CNPAF; JOSE ALOISIO ALVES MOREIRA, CNPMS; ALEXANDRE BRYAN HEINEMANN, CNPAF.
Date Issued: 2013
Citation: Pesquisa Agropecuária Brasileira, v. 48, n. 5, p. 478-486, maio 2013.
Description: The objective of this work was to measure the fluxes of N2O-N and NH3-N throughout the growing season of irrigated common-bean (Phaseolus vulgaris), as affected by mulching and mineral fertilization. Fluxes of N2O-N and NH3-N were evaluated in areas with or without Congo signal grass mulching (Urochloa ruziziensis) or mineral fertilization. Fluxes of N were also measured in a native Cerrado area, which served as reference. Total N2O-N and NH3-N emissions were positively related to the increasing concentrations of moisture, ammonium, and nitrate in the crop system, within 0.5 m soil depth. Carbon content in the substrate and microbial biomass within 0.1 m soil depth were favoured by Congo signal grass and related to higher emissions of N2O-N, regardless of N fertilization. Emission factors (N losses from the applied mineral nitrogen) for N2O-N (0.01-0.02%) and NH3-N (0.3-0.6%) were lower than the default value recognized by the Intergovernmental Panel on Climate Change. Mulch of Congo signal grass benefits N2O-N emission regardless of N fertilization.
Thesagro: Feijão
Phaseolus vulgaris
Brachiaria
Plantio direto
Cobertura morta
Cerrado
Nitrogênio
Óxido
Efeito estufa
Fertilidade do solo
Mudança Climática.
Keywords: Óxido nitroso.
ISSN: 0100-204X
Language: en
DOI: 10.1590/S0100-204X2013000500003
Type of Material: Artigo de periódico
Access: openAccess
Appears in Collections:Artigo em periódico indexado (CNPAF)

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