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 | Acesso ao texto completo restrito à biblioteca da Embrapa Milho e Sorgo. Para informações adicionais entre em contato com cnpms.biblioteca@embrapa.br. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Agrobiologia; Embrapa Gado de Leite; Embrapa Milho e Sorgo. |
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Data corrente: |
25/11/2020 |
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Data da última atualização: |
08/01/2021 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
MACIEL, I. C. F.; BARBOSA, F. A.; ALVES, B. J. R.; ALVARENGA, R. C.; TOMICH, T. R.; CAMPANHA, M. M.; ROWNTREE, J. E.; ALVES, F. C.; LANA, A. M. Q. |
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Afiliação: |
Isabella C. F. Maciel, Universidade Federal de Minas Gerais; Fabiano A. Barbosa, De Heus Animal Nutrition; BRUNO JOSE RODRIGUES ALVES, CNPAB; RAMON COSTA ALVARENGA, CNPMS; THIERRY RIBEIRO TOMICH, CNPGL; MONICA MATOSO CAMPANHA, CNPMS; Jason E. Rowntree, Michigan State Universit; Filipe C. Alves, Michigan State University; Angela M. Q. Lana, Universidade Federal de Minas Gerais. |
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Título: |
Nitrous oxide and methane emissions from beef cattle excreta deposited on feedlot pen surface in tropical conditions. |
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Ano de publicação: |
2021 |
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Fonte/Imprenta: |
Agricultural Systems, v. 187, 102995, 2021. |
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Idioma: |
Inglês |
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Conteúdo: |
As feedlot beef production systems are expanding into tropical climates, considerably less is known on their environmental impact specific to these regions. Our objective was to investigate the dynamics of nitrous oxide (N2O) and methane (CH4) fluxes in a feedlot system representative of Brazil, in order to aggregate new emission data for the characterization of intensive cattle raising in tropical regions. Excreta was obtained from Nellore steers in a feedlot (n = 25, BW = 393 ± 31 kg). Urine (1.3 L) and feces (1.3 kg) were applied separately in plots on an open-lot feedlot pen surface at the beginning of the trial and fluxes were monitored 92 d with static chambers. Although CH4 fluxes were variable, all treatments were a sink for CH4 as the average of the monitoring period (? 8.9, ? 3.1, and ? 15.4 ?g C m? 2 h? 1 for feces, urine, and control, respectively). The N2O fluxes were higher in the urine affected area, which was related to the higher soil moisture and mineral N availability in comparison to the area with feces. The occurrence of rainfall from 67 to 70 DAA was determinant of very high N2O fluxes either for urine or feces. Hence, GHG emissions from individual excreta were characterized by a period of small but significant fluxes, followed by a period of indistinguishable fluxes at the background level. A third period after rainfall portrayed the large impact of excreta on GHG emissions from the feedlot. The direct N2O emission factor (EF) for the N in urine was significantly higher than for the N in feces (2.83 vs. 0.32%, respectively, P < 0.0001), and combining both resulted in an EF for the N in excreta of 1.83%, which is 8.5% less than IPCC default EF for dry lot systems. From the calculated direct emissions of N2O, gas monitoring of urine and feces in separate should be also considered for the development of emission factors for inventory purposes in tropical environments. For the regions where feedlots are used in the dry season for finishing cattle, cleaning pens regularly can contribute substantially to mitigate N2O emissions as suggested by the results of the present study. MenosAs feedlot beef production systems are expanding into tropical climates, considerably less is known on their environmental impact specific to these regions. Our objective was to investigate the dynamics of nitrous oxide (N2O) and methane (CH4) fluxes in a feedlot system representative of Brazil, in order to aggregate new emission data for the characterization of intensive cattle raising in tropical regions. Excreta was obtained from Nellore steers in a feedlot (n = 25, BW = 393 ± 31 kg). Urine (1.3 L) and feces (1.3 kg) were applied separately in plots on an open-lot feedlot pen surface at the beginning of the trial and fluxes were monitored 92 d with static chambers. Although CH4 fluxes were variable, all treatments were a sink for CH4 as the average of the monitoring period (? 8.9, ? 3.1, and ? 15.4 ?g C m? 2 h? 1 for feces, urine, and control, respectively). The N2O fluxes were higher in the urine affected area, which was related to the higher soil moisture and mineral N availability in comparison to the area with feces. The occurrence of rainfall from 67 to 70 DAA was determinant of very high N2O fluxes either for urine or feces. Hence, GHG emissions from individual excreta were characterized by a period of small but significant fluxes, followed by a period of indistinguishable fluxes at the background level. A third period after rainfall portrayed the large impact of excreta on GHG emissions from the feedlot. The direct N2O emission factor (EF) for the N in urine was si... Mostrar Tudo |
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Palavras-Chave: |
Emissão de CH4; Emissão de GEE; Excreta bovina; Fator de emissão de N2O; Óxido nitroso. |
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Thesagro: |
Bovino; Excremento; Metano. |
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Categoria do assunto: |
L Ciência Animal e Produtos de Origem Animal |
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Marc: |
LEADER 03032naa a2200313 a 4500
001 2127113
005 2021-01-08
008 2021 bl uuuu u00u1 u #d
100 1 $aMACIEL, I. C. F.
245 $aNitrous oxide and methane emissions from beef cattle excreta deposited on feedlot pen surface in tropical conditions.$h[electronic resource]
260 $c2021
520 $aAs feedlot beef production systems are expanding into tropical climates, considerably less is known on their environmental impact specific to these regions. Our objective was to investigate the dynamics of nitrous oxide (N2O) and methane (CH4) fluxes in a feedlot system representative of Brazil, in order to aggregate new emission data for the characterization of intensive cattle raising in tropical regions. Excreta was obtained from Nellore steers in a feedlot (n = 25, BW = 393 ± 31 kg). Urine (1.3 L) and feces (1.3 kg) were applied separately in plots on an open-lot feedlot pen surface at the beginning of the trial and fluxes were monitored 92 d with static chambers. Although CH4 fluxes were variable, all treatments were a sink for CH4 as the average of the monitoring period (? 8.9, ? 3.1, and ? 15.4 ?g C m? 2 h? 1 for feces, urine, and control, respectively). The N2O fluxes were higher in the urine affected area, which was related to the higher soil moisture and mineral N availability in comparison to the area with feces. The occurrence of rainfall from 67 to 70 DAA was determinant of very high N2O fluxes either for urine or feces. Hence, GHG emissions from individual excreta were characterized by a period of small but significant fluxes, followed by a period of indistinguishable fluxes at the background level. A third period after rainfall portrayed the large impact of excreta on GHG emissions from the feedlot. The direct N2O emission factor (EF) for the N in urine was significantly higher than for the N in feces (2.83 vs. 0.32%, respectively, P < 0.0001), and combining both resulted in an EF for the N in excreta of 1.83%, which is 8.5% less than IPCC default EF for dry lot systems. From the calculated direct emissions of N2O, gas monitoring of urine and feces in separate should be also considered for the development of emission factors for inventory purposes in tropical environments. For the regions where feedlots are used in the dry season for finishing cattle, cleaning pens regularly can contribute substantially to mitigate N2O emissions as suggested by the results of the present study.
650 $aBovino
650 $aExcremento
650 $aMetano
653 $aEmissão de CH4
653 $aEmissão de GEE
653 $aExcreta bovina
653 $aFator de emissão de N2O
653 $aÓxido nitroso
700 1 $aBARBOSA, F. A.
700 1 $aALVES, B. J. R.
700 1 $aALVARENGA, R. C.
700 1 $aTOMICH, T. R.
700 1 $aCAMPANHA, M. M.
700 1 $aROWNTREE, J. E.
700 1 $aALVES, F. C.
700 1 $aLANA, A. M. Q.
773 $tAgricultural Systems$gv. 187, 102995, 2021.
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Registro original: |
Embrapa Agrobiologia (CNPAB) |
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| Registros recuperados : 147 | |
| 7. |  | CAMPANHA, M. M. SISTEMA agrossilvipastorial para o semi-árido brasileiro. Sobral: Embrapa Caprinos, 2008. 1 DVD (07 min), NTSC, son., color. Apóio técnico: Nilzemary Lima da Silva, Marcelo Renato Alves de Araújo e Ismar Maciel dos Santos, Embrapa Caprinos (CNPC). Roteiro e produção: Mônica Matoso Campanha, Verônica Maria V. Freire, Embrapa Caprinos (CNPC).
Responsável técnico:...| Biblioteca(s): Embrapa Caprinos e Ovinos. |
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| 14. | | GOMES, T. O.; KIILL, L. H. P.; CAMPANHA, M. M. Caracterização fitossociológica da caatinga em área de fundo de pasto no município de Uauá-BA. In: CONGRESSO NACIONAL DE BOTÂNICA, 59.; REUNIÃO NORDESTINA DE BOTÂNICA, 31.; CONGRESSO LATINOAMERICANO Y DEL CARIBE DE CACTÁCEAS Y OTRAS SUCULENTAS, 4.; CONGRESS OF INTERNATIONAL ORGANIZATION FOR SUCULENT PLANT STUDY, 30., 2008, Natal. Atualidades, desafios e perspectivas da botânica no Brasil: anais. Natal: UFERSA: UFRN: SBB, 2008. 1 CD-ROM.| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Caprinos e Ovinos; Embrapa Semiárido. |
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| 15. | | CAMPANHA, M. M.; GUIMARÃES, V. P.; PEREIRA, J. A. Desempenho de ovinos em sistema agrossilvipastoril desenvolvido para o semi-árido brasileiro, em Sobral, CE. In: CONGRESSO BRASILEIRO DE SISTEMAS AGROFLORESTAIS, 7., 2009, Luziánia. Diálogo e integração de saberes em sistemas agroflorestais para sociedades sustentáveis. [Luziânia]: Sociedade Brasileira de Sistemas Agroflorestais; [Brasília, DF]: EMATER-DF: Embrapa, 2009. 3 f. 1 CD-ROM.| Tipo: Artigo em Anais de Congresso |
| Biblioteca(s): Embrapa Caprinos e Ovinos. |
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| 20. | | SILVA, V. M. A.; CAMPANHA, M. M.; MEDEIROS, H. R. de. Análise florística e estrutural do estrato arbóreo-arbustivo de um sistema agroflorestal na Caatinga, em Sobral, CE. In: CONGRESSO BRASILEIRO DE SISTEMAS AGROFLORESTAIS, 7., 2009, Luziánia. Diálogo e integração de saberes em sistemas agroflorestais para sociedades sustentáveis. [Luziânia]: Sociedade Brasileira de Sistemas Agroflorestais; [Brasília, DF]: EMATER-DF: Embrapa, 2009. 2 f. 1 CD-ROM.| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Caprinos e Ovinos. |
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| Registros recuperados : 147 | |
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| Nenhum registro encontrado para a expressão de busca informada. |
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