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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: |
LEADER 02390naa a2200313 a 4500
001 2144817
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008 2022 bl uuuu u00u1 u #d
024 7 $ahttps://doi.org/10.1002/jeq2.20362$2DOI
100 1 $aVEECK, G. P.
245 $aCO2 flux in a wheat-soybean succession in subtropical Brazil$bA carbon sink.$h[electronic resource]
260 $c2022
520 $aAbstract: 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.
650 $aCultivo Anual
650 $aManejo do Solo
650 $aPousio
650 $aRespiração do Solo
650 $aSoja
650 $aTrigo
653 $aSucessão soja-trigo
700 1 $aDALMAGO, G. A.
700 1 $aBREMM, T.
700 1 $aBULIGON, L.
700 1 $aJACQUES, R. J. S.
700 1 $aFERNANDES, J. M. C.
700 1 $aSANTI, A.
700 1 $aVARGAS, P. R.
700 1 $aROBERTI, D. R.
773 $tJournal of Environmental Quality, 1-17, 2022.
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| 13. |  | PICININI, E. C.; FERNANDES, J. M. C. Controle da mancha-em-rede (Drechslera teres) em cevada, cultivar EMBRAPA 129, com os novos fungicidas Taspa e Artea, no ano de 1998. In: REUNIÃO ANUAL DE PESQUISA DE CEVADA, 19., 1999, Passo Fundo. Anais... Passo Fundo: Embrapa Trigo, 1999. p. 412-417 (Embrapa Trigo. Documentos, 5).| Biblioteca(s): Embrapa Trigo. |
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| 18. | | PICININI, E. C.; FERNANDES, J. M. Controle de oídio (Erysiphe graminis f. sp. tritici) e da mancha amarela da folha (Drechslera tritici-repentis) com fungicidas, em trigo. In: REUNIÃO NACIONAL DE PESQUISA DE TRIGO, 17., 1994, Passo Fundo. Resumos... Passo Fundo: EMBRAPA-CNPT, 1994. p. 74. E em CONGRESSO BRASILEIRO DE FITOPATOLOGIA, 27., 1994, Itajai. Fitopatologia Brasileira, Brasília, DF, v. 19, p. 280, ago. 1994. Suplemento.| Biblioteca(s): Embrapa Trigo. |
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