Data/hora: 04/06/2024 03:33:07

Biblioteca(s): | Embrapa Clima Temperado.
Data corrente: | 22/10/2021
Data da última atualização: | 22/10/2021
Autoria: | MABONI, C.; BREMM, T.; AGUIAR, L. J. G.; SCIVITTARO, W. B.; SOUZA, V. de A.; ZIMERMANN, H. R.; TEICHRIEB, C. A.; OLIVEIRA, P. E. S. de; HERDIES, D. L.; DEGRAZIA, G. A.; ROBERTI, D. R.
Afiliação: | CRISTIANO MABONI, UFSM; TIAGO BREMM, UFSM; LEONARDO JOSÉ GONÇALVES AGUIAR, UFPEL; WALKYRIA BUENO SCIVITTARO, CPACT; VANESSA DE ARRUDA SOUZA; HANS ROGÉRIO ZIMERMANN, UFSM; CLAUDIO ALBERTO TEICHRIEB, UFSM; PABLO ELI SOARES DE OLIVEIRA, UFSM; DIRCEU LUIS HERDIES, CPTEC; GERVÁSIO ANNES DEGRAZIA, UFSM; DÉBORA REGINA ROBERTI, UFSM.
Título: | The fallow period plays an important role in annual CH4 emission in a rice paddy in southern Brazil.
Ano de publicação: | 2021
Fonte/Imprenta: | Sustainability, v. 13, n. 20, 11336, 2021.
ISSN: | 2071-1050
DOI: | doi.org/10.3390/su132011336
Idioma: | Inglês
Conteúdo: | Paddy fields are significant anthropogenic sources of methane (CH4) emissions. In southern Brazil, rice is grown in lowland flooded areas once a year, followed by a long fallow period. This study aimed to measure CH4 fluxes in a rice paddy field in southern Brazil during the rice-growing season of 2015/2016 and the following fallow period. The fluxes were estimated using the eddy covariance (EC) technique and soil chamber (SC). Diurnal and seasonal variations of CH4 fluxes and potential meteorological drivers were analyzed. The CH4 fluxes showed distinct diurnal variations in each analyzed subperiod (vegetative, reproductive, pre-harvest, no rice, and land preparation), characterized by a single-peak diurnal pattern. The variables that most influenced methane emissions were air and surface temperatures. In the growing season, the rice vegetative stage was responsible for most of the measured emissions. The accumulated annual emission estimated was 44.88 g CH4 m?2 y?1, being 64% (28.50 g CH4 m?2) due to the rice-growing season and 36% (16.38 g CH4 m?2) due to the fallow period. These results show the importance of including fallow periods in strategies to mitigate methane emissions in flood irrigated rice-growing areas.
Palavras-Chave: | Fluxo de CH4.
Thesagro: | Arroz; Metano; Pousio.
Categoria do assunto: | --
URL: | http://ainfo.cnptia.embrapa.br/digital/bitstream/item/227108/1/Artigo-The-Fallow-Period-Plays-Sustainability.pdf
Registro original: | Embrapa Clima Temperado (CPACT)
Exemplares: | CPACT - (22006-1) - UPC - AP - DD -  -  -  - DIS