Soil methane oxidation in a long-term no-tillage system in Southern Brazil

Autores

  • Cimélio Bayer Universidade Federal do Rio Grande do Sul
  • Juliana Gomes Universidade Federal do Rio Grande do Sul
  • Frederico Costa Beber Vieira Universidade Federal do Pampa
  • Josiléia Accordi Zanatta Empresa Brasileira de Pesquisa Agropecuária
  • Marisa de Cássia Piccolo Universidade de São Paulo
  • Jeferson Dieckow Universidade Federal do Parana

DOI:

https://doi.org/10.5433/1679-0359.2013v34n4p1695

Palavras-chave:

Global warming, Tillage systems, Tropical soils, Cropping systems.

Resumo

Conservation management systems are usually suggested as alternative to restore the soil methane (CH4) oxidation capacity of degraded soils; however, little information is available on tropical and subtropical soils. Our objective was to evaluate the long-term (19 years) effect of no-tillage (NT) versus conventional tillage (CT) management systems on CH4 fluxes in a formerly degraded Acrisol in Southern Brazil. Annual CH4 fluxes of two cropping systems [O/M-black oat (Avena strigosa)/maize and V/M-vetch (Vigna sativa)/maize] were measured in NT and CT soils. Static chambers were used for air sampling, while chromatography was used for CH4 analysis. Analysis of the historical dataset at this experimental site indicated improvements in soil quality under the NT system, especially in legume-based cropping system (V/M) that exhibited the highest annual biomass input. CH4 fluxes ranged from ?42 ± 2 to 38 ± 16 ?g C m-2 h-1, and annual CH4 emissions ranged from ?825 ± 117 (CT V/M) to 453 ± 185 g C ha-1 (NT O/M). Thus, the annual CH4 oxidation capacity of the soil was not related to the soil quality produced by the soil management systems. On the basis of our results and published literature, we postulate that conservation management systems improve the methane oxidation and soil quality in distinct soil layers, which result in a slow effect of these management systems on the methane oxidation capacity.

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Biografia do Autor

Cimélio Bayer, Universidade Federal do Rio Grande do Sul

Prof. Associado, Universidade Federal do Rio Grande do Sul, UGRGS, Deptº de Solos, 91540-000, Porto Alegre, RS. Brazil.

Juliana Gomes, Universidade Federal do Rio Grande do Sul

Profª Associado, Universidade Federal do Rio Grande do Sul, UGRGS, Deptº de Solos, 91540-000, Porto Alegre, RS. Brazil.

Frederico Costa Beber Vieira, Universidade Federal do Pampa

Prof. Adjunto, Universidade Federal do Pampa, UNIPAMPA, Av. Antonio Trilha, 1847, 97300-000, São Gabriel, RS, Brazil.

Josiléia Accordi Zanatta, Empresa Brasileira de Pesquisa Agropecuária

Pesquisadora, Empresa Brasileira de Pesquisa Agropecuária, EMBRAPA, Centro Nacional de Pesquisa de Florestas, 83411-000, Colombo, PR, Brazil.

Marisa de Cássia Piccolo, Universidade de São Paulo

Profª Livre-Docente, Universidade de São Paulo, USP, Centro de Energia Nuclear na Agricultura, 13416-000, Piracicaba, SP, Brazil.

Jeferson Dieckow, Universidade Federal do Parana

Prof. Adjunto, Universidade Federal do Paraná, UFPR, Deptº de Solos e Engenharia Agrícola, 80035-050, Curitiba, PR, Brazil.

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Publicado

2013-08-30

Como Citar

Bayer, C., Gomes, J., Vieira, F. C. B., Zanatta, J. A., Piccolo, M. de C., & Dieckow, J. (2013). Soil methane oxidation in a long-term no-tillage system in Southern Brazil. Semina: Ciências Agrárias, 34(4), 1695–1706. https://doi.org/10.5433/1679-0359.2013v34n4p1695

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