Título:	Carbon dioxide emissions in agricultural systems in the Brazilian savanna.
Autoria:	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.
Afiliação:	JESSICA PEREIRA DE SOUZA, UFRGS; ELISANDRA SOLANGE OLIVEIRA BORTOLON, CNPASA; LEANDRO BORTOLON, CNPASA; FRANCELINO PETENO DE CAMARGO, CNPASA; WILLIAN SOUSA SILVA CONCEICAO, FACULDADE CATÓLICA DO TOCANTINS; ALAN DE ORNELAS LIMA, FACULDADE CATÓLICA DO TOCANTINS; FABIANE MACHADO VEZZANI, UNIVERSIDADE FEDERAL DO PARANÁ.
Ano de publicação:	2019
Referência:	Journal of Agricultural Science, v. 11, n. 1, p. 242-250, 2019
Conteúdo:	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.
Thesagro:	Cerrado Carbono Dióxido de Carbono Plantio Direto Temperatura do Solo
ISSN:	1916-9760
Tipo do material:	Artigo de periódico
Acesso:	openAccess
Aparece nas coleções:	Artigo em periódico indexado (CNPASA)