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 | Acesso ao texto completo restrito à biblioteca da Embrapa Trigo. Para informações adicionais entre em contato com cnpt.biblioteca@embrapa.br. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Trigo. |
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Data corrente: |
19/07/2022 |
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Data da última atualização: |
19/07/2022 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
VEECK, G. P.; DALMAGO, G. A.; BREMM, T.; BULIGON, L.; JACQUES, R. J. S.; FERNANDES, J. M. C.; SANTI, A.; VARGAS, P. R.; ROBERTI, D. R. |
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Afiliação: |
GUSTAVO PUJOL VEECK, UFSM; GENEI ANTONIO DALMAGO, CNPT; TIAGO BREMM, UFSM; LIDIANE BULIGON, UFSM; RODRIGO JOSEMAR SEMINOTI JACQUES, UFSM; JOSE MAURICIO CUNHA FERNANDES, CNPT; ANDERSON SANTI, CNPT; PAULO ROBERTO VARGAS, Fazenda Capão Grande; DÉBORA REGINA ROBERTI, UFSM. |
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Título: |
CO2 flux in a wheat-soybean succession in subtropical Brazil: A carbon sink. |
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Ano de publicação: |
2022 |
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Fonte/Imprenta: |
Journal of Environmental Quality, 1-17, 2022. |
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DOI: |
https://doi.org/10.1002/jeq2.20362 |
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Idioma: |
Inglês |
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Conteúdo: |
Abstract: The subtropical region of Brazil is home to 33% of the soybean [Glycine max (L.) Merr.] growing area and 90% of the wheat (Tritucum aestivum L.) growing area of this country. A soybean?wheat succession with fallow between crops is used in about 11% of the cultivated area. No study has quantified CO2 fluxes in annual soybean?wheat succession in this region. Hence, this study analyzed the seasonality of CO2 exchange (net ecosystem exchange [NEE]) in a 2015/2016 wheat?soybean succession in a commercial farm located in Carazinho, Rio Grande do Sul State, Brazil. The eddy covariance method was used to estimate the annual C balance of this system. The NEE was partitioned between gross primary productivity and ecosystem respiration to understand the dynamics of these fluxes during a year of wheat?soybean succession. Considering the net ecosystem balance between photosynthesis and respiration during the growing season, both soybean and wheat absorbed CO2 from the atmosphere (NEE wheat: ?347 ± 4 g C m?2; NEE soybean: ?242 ± 3 g C m?2). The fallow periods between growing seasons, however, acted as a source of 156 ± 2 g C m?2, reducing the C absorbed by the crops by 27%. For 1 yr, the net biome productivity was ?50 g C m?2 yr?1. The results obtained here demonstrate that the wheat?soybean succession was a net C sink under these specific climatic conditions and field management practices and that the long fallow period between crops limited the agroecosystem from becoming a more efficient CO2 sink. MenosAbstract: The subtropical region of Brazil is home to 33% of the soybean [Glycine max (L.) Merr.] growing area and 90% of the wheat (Tritucum aestivum L.) growing area of this country. A soybean?wheat succession with fallow between crops is used in about 11% of the cultivated area. No study has quantified CO2 fluxes in annual soybean?wheat succession in this region. Hence, this study analyzed the seasonality of CO2 exchange (net ecosystem exchange [NEE]) in a 2015/2016 wheat?soybean succession in a commercial farm located in Carazinho, Rio Grande do Sul State, Brazil. The eddy covariance method was used to estimate the annual C balance of this system. The NEE was partitioned between gross primary productivity and ecosystem respiration to understand the dynamics of these fluxes during a year of wheat?soybean succession. Considering the net ecosystem balance between photosynthesis and respiration during the growing season, both soybean and wheat absorbed CO2 from the atmosphere (NEE wheat: ?347 ± 4 g C m?2; NEE soybean: ?242 ± 3 g C m?2). The fallow periods between growing seasons, however, acted as a source of 156 ± 2 g C m?2, reducing the C absorbed by the crops by 27%. For 1 yr, the net biome productivity was ?50 g C m?2 yr?1. The results obtained here demonstrate that the wheat?soybean succession was a net C sink under these specific climatic conditions and field management practices and that the long fallow period between crops limited the agroecosystem from becoming a mo... Mostrar Tudo |
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Palavras-Chave: |
Sucessão soja-trigo. |
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Thesagro: |
Cultivo Anual; Manejo do Solo; Pousio; Respiração do Solo; Soja; Trigo. |
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Categoria do assunto: |
-- |
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Marc: |
null
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Registro original: |
Embrapa Trigo (CNPT) |
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| Acesso ao texto completo restrito à biblioteca da Embrapa Meio-Norte. Para informações adicionais entre em contato com cpamn.biblioteca@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Meio-Norte. |
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Data corrente: |
18/01/1999 |
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Data da última atualização: |
31/08/2009 |
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Autoria: |
CARVALHO, J. H. de; RAMOS, G. M. |
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Afiliação: |
EMBRAPA-UEPAE de Teresina. |
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Título: |
Produtividade da faveira (Parkya platycephala Benth.) em tres municipios piauienses. |
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Ano de publicação: |
1983 |
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Fonte/Imprenta: |
In: CONGRESSO BRASILEIRO DE FORRAGEIRAS E PASTAGENS NATIVAS, 1., 1983, Olinda-PE. Resumos... Recife: IPA/EMBRAPA, 1983. p. 44. |
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Idioma: |
Português |
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Palavras-Chave: |
Brasil; Piaui. |
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Thesagro: |
Faveira; Produtividade. |
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Categoria do assunto: |
-- |
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Marc: |
null
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Registro original: |
Embrapa Meio-Norte (CPAMN) |
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