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Registro Completo |
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Biblioteca(s): |
Embrapa Agricultura Digital; Embrapa Meio Ambiente. |
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Data corrente: |
05/08/2024 |
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Data da última atualização: |
28/01/2025 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
CABRAL, O. M. R.; FREITAS, H. C. de; CUADRA, S. V.; NOGUEIRA, S. F.; KOENIGKAN, L. V.; LIGO, M. A. V.; ANDRADE, C. A. de; GASH, J. H.; ROCHA, H. R. da; ROSSI, P. |
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Afiliação: |
OSVALDO MACHADO RODRIGUES CABRAL, CNPMA; HELBER C. DE FREITAS, UNIVERSIDADE ESTADUAL PAULISTA "JÚLIO DE MESQUITA FILHO"; SANTIAGO VIANNA CUADRA, CNPTIA; SANDRA FURLAN NOGUEIRA, CNPMA; LUCIANO VIEIRA KOENIGKAN, CNPTIA; MARCOS ANTONIO VIEIRA LIGO, CNPMA; CRISTIANO ALBERTO DE ANDRADE, CNPMA; JOHN H. GASH, UNIVERSITY OF LISBON; HUMBERTO R. DA ROCHA, UNIVERSIDADE DE SÃO PAULO; PAULO ROSSI, CNPMA. |
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Título: |
Eddy covariance fluxes of greenhouse gasses observed in a renewed pasture in the southeast of Brazil. |
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Ano de publicação: |
2024 |
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Fonte/Imprenta: |
Agricultural and Forest Meteorology, v. 356, 110177, 2024. |
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DOI: |
10.1016/j.agrformet.2024.110177 |
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Idioma: |
Inglês |
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Conteúdo: |
The recovery of degraded pastures and the increase in their capacity for storing carbon is a key strategy in Brazil’s commitment to meeting its Nationally Determined Contribution (NDC) to the international effort to halt global warming. Here we report the fluxes of CO2, N2O and CH4 gasses and their balances, obtained by the eddy covariance method, from a representative pasture area in southeast Brazil. The measurements covered more than five years, starting with the old degraded pasture, covering the renewal process and then the re-establishment of pasture. The latter only received nitrogen fertilization once after the renewal – the common practice. The net ecosystem carbon balance (NECB), which considered the sum of the net ecosystem exchange (NEEpasture) of CO2 and methane (FCH4pasture) without the cattle respiration and enteric fermentation, as well the export/import of carbon by grazing and as feces (stocking rates of 1.8 to 3.3 AU ha−1), was positive in the old pasture (236 ± 104 g CO2 m−2 year−1) representing a source to the atmosphere, but a sink (negative) during the first year of the renewal (-1603 ± 122 g CO2 m−2 year−1) when it was fertilized and the recorded rainfall was normal. In the following two years it was neutral (77 ± 93 and 5 ± 100 g CO2 m−2 year−1), partially a consequence of the lower rainfall received. In the fourth year it was a sink again (-736 ± 131 g CO2 m−2 year−1). On average the cumulative fluxes of CH4 (42 ± 19 g CO2 eq. m−2 year−1) without the animals’ enteric fermentation and N2O (20 ± 10 g CO2 eq. m−2 year−1) were small and positive, being offset by the net carbon gain. The NECB for this site covering the period of measurements was an overall source of 671 ± 254 g CO2 m−2. Previous article in issue MenosThe recovery of degraded pastures and the increase in their capacity for storing carbon is a key strategy in Brazil’s commitment to meeting its Nationally Determined Contribution (NDC) to the international effort to halt global warming. Here we report the fluxes of CO2, N2O and CH4 gasses and their balances, obtained by the eddy covariance method, from a representative pasture area in southeast Brazil. The measurements covered more than five years, starting with the old degraded pasture, covering the renewal process and then the re-establishment of pasture. The latter only received nitrogen fertilization once after the renewal – the common practice. The net ecosystem carbon balance (NECB), which considered the sum of the net ecosystem exchange (NEEpasture) of CO2 and methane (FCH4pasture) without the cattle respiration and enteric fermentation, as well the export/import of carbon by grazing and as feces (stocking rates of 1.8 to 3.3 AU ha−1), was positive in the old pasture (236 ± 104 g CO2 m−2 year−1) representing a source to the atmosphere, but a sink (negative) during the first year of the renewal (-1603 ± 122 g CO2 m−2 year−1) when it was fertilized and the recorded rainfall was normal. In the following two years it was neutral (77 ± 93 and 5 ± 100 g CO2 m−2 year−1), partially a consequence of the lower rainfall received. In the fourth year it was a sink again (-736 ± 131 g CO2 m−2 year−1). On average the cumulative fluxes of CH4 (42 ± 19 g CO2 eq. m−2 year−1) without th... Mostrar Tudo |
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Palavras-Chave: |
Covariância; Covariância de vórtices turbulentos; Gases do efeito estufa; Óxido nitroso. |
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Thesagro: |
Biomassa; Dióxido de Carbono; Metano; Pastagem. |
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Thesaurus Nal: |
Biomass; Carbon dioxide; Eddy covariance; Greenhouse gas emissions; Greenhouse gases; Methane; Nitrous oxide; Pastures. |
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Categoria do assunto: |
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P Recursos Naturais, Ciências Ambientais e da Terra |
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Marc: |
LEADER 03048naa a2200433 a 4500
001 2166243
005 2025-01-28
008 2024 bl uuuu u00u1 u #d
024 7 $a10.1016/j.agrformet.2024.110177$2DOI
100 1 $aCABRAL, O. M. R.
245 $aEddy covariance fluxes of greenhouse gasses observed in a renewed pasture in the southeast of Brazil.$h[electronic resource]
260 $c2024
520 $aThe recovery of degraded pastures and the increase in their capacity for storing carbon is a key strategy in Brazil’s commitment to meeting its Nationally Determined Contribution (NDC) to the international effort to halt global warming. Here we report the fluxes of CO2, N2O and CH4 gasses and their balances, obtained by the eddy covariance method, from a representative pasture area in southeast Brazil. The measurements covered more than five years, starting with the old degraded pasture, covering the renewal process and then the re-establishment of pasture. The latter only received nitrogen fertilization once after the renewal – the common practice. The net ecosystem carbon balance (NECB), which considered the sum of the net ecosystem exchange (NEEpasture) of CO2 and methane (FCH4pasture) without the cattle respiration and enteric fermentation, as well the export/import of carbon by grazing and as feces (stocking rates of 1.8 to 3.3 AU ha−1), was positive in the old pasture (236 ± 104 g CO2 m−2 year−1) representing a source to the atmosphere, but a sink (negative) during the first year of the renewal (-1603 ± 122 g CO2 m−2 year−1) when it was fertilized and the recorded rainfall was normal. In the following two years it was neutral (77 ± 93 and 5 ± 100 g CO2 m−2 year−1), partially a consequence of the lower rainfall received. In the fourth year it was a sink again (-736 ± 131 g CO2 m−2 year−1). On average the cumulative fluxes of CH4 (42 ± 19 g CO2 eq. m−2 year−1) without the animals’ enteric fermentation and N2O (20 ± 10 g CO2 eq. m−2 year−1) were small and positive, being offset by the net carbon gain. The NECB for this site covering the period of measurements was an overall source of 671 ± 254 g CO2 m−2. Previous article in issue
650 $aBiomass
650 $aCarbon dioxide
650 $aEddy covariance
650 $aGreenhouse gas emissions
650 $aGreenhouse gases
650 $aMethane
650 $aNitrous oxide
650 $aPastures
650 $aBiomassa
650 $aDióxido de Carbono
650 $aMetano
650 $aPastagem
653 $aCovariância
653 $aCovariância de vórtices turbulentos
653 $aGases do efeito estufa
653 $aÓxido nitroso
700 1 $aFREITAS, H. C. de
700 1 $aCUADRA, S. V.
700 1 $aNOGUEIRA, S. F.
700 1 $aKOENIGKAN, L. V.
700 1 $aLIGO, M. A. V.
700 1 $aANDRADE, C. A. de
700 1 $aGASH, J. H.
700 1 $aROCHA, H. R. da
700 1 $aROSSI, P.
773 $tAgricultural and Forest Meteorology$gv. 356, 110177, 2024.
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