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Provedor de dados:  Repositório Alice
País:  Brazil
Título:  Carbon dioxide emissions in agricultural systems in the Brazilian savanna.
Autores:  SOUZA, J. P. de
BORTOLON, E. S. O.
BORTOLON, L.
CAMARGO, F. P. de
CONCEIÇÃO, W. S. S.
LIMA, A. de O.
VEZZANI, F. M.
Data:  2019-10-29
Ano:  2019
Palavras-chave:  Cerrado
Carbono
Dióxido de Carbono
Plantio Direto
Temperatura do Solo
Resumo:  The objectives of this work were to evaluate the CO2 emission potential of an Oxisol under integrated crop-livestock and no-tillage systems in the Brasilian Savanna; and to analyze the impact of soil temperature and soil moisture as factors that regulate the seasonality and the emission of C-CO2 in these systems. Field-scale study was carried out at Fazenda Brejinho, in Pedro Afonso-TO, under Oxisol. The production systems studied were integrated crop-livestock and no-tillage under cropped with soybean and corn. The amount of carbon (C) released from the soil in the form of CO2 (C-CO2) was evaluated using cylindrical chambers installed in the field with a vial containing sodium hydroxide to collect CO2 released from the soil (soil emission) in an interval of 15 hours. Five evaluations were conducted over crops growing season, started in 01/26 through 06/16/2015. Data were tested to analysis of variance and the means were compared with Duncan test at 5%. The emission of C-CO2 differed between treatments in all evaluation periods. On average, the temperature ranged from 26.5 to 27.7 °C, the soil moisture ranged from 12.2 to 15.7% and the C-CO2 emission ranged from 87.4 to 119.9 mg m-2 h-1. Temperature, soil moisture and the production systems contributed to the emission and seasonality of carbon dioxide emissions. The integrated crop-livestock cropped with soybean/corn rotation was the system that had the lowest carbon dioxide emission.

bitstream/item/203902/1/CNPASA-2019-jas.pdf
Tipo:  Artigo em periódico indexado (ALICE)
Idioma:  Inglês
Identificador:  1916-9760

826

http://www.alice.cnptia.embrapa.br/alice/handle/doc/1113622
Editor:  Journal of Agricultural Science, v. 11, n. 1, p. 242-250, 2019
Relação:  Embrapa Pesca e Aquicultura - Artigo em periódico indexado (ALICE)
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