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Registro Completo |
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Biblioteca(s): |
Embrapa Milho e Sorgo. |
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Data corrente: |
02/10/2021 |
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Data da última atualização: |
02/10/2021 |
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Tipo da produção científica: |
Artigo em Anais de Congresso |
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Autoria: |
MACIEL, I. C. de F.; ALVARENGA, R. C.; CAMPANHA, M. M.; GONTIJO NETO, M. M. |
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Afiliação: |
ISABELLA CRISTINA DE FARIA MACIEL; RAMON COSTA ALVARENGA, CNPMS; MONICA MATOSO CAMPANHA, CNPMS; MIGUEL MARQUES GONTIJO NETO, CNPMS. |
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Título: |
Greenhouse gas emissions by cattle reared in an integrated croplivestock system and finished in feedlot. |
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Ano de publicação: |
2021 |
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Fonte/Imprenta: |
In: WORLD CONGRESS ON INTEGRATED CROP-LIVESTOCK-FORESTRY SYSTEMS, 2., 2021. Proceedings reference... Brasília, DF: Embrapa, 2021. |
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Páginas: |
p. 85-91. |
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ISBN: |
978-65-994135-4-4 |
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Idioma: |
Inglês |
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Notas: |
WCCLF.
Evento online. |
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Conteúdo: |
Beef cattle is one of the main sources of GHG in the agricultural sector, however, it is possible to implement improvements in this segment to mitigate GHG emissions. Beef production in an integrated crop-livestock system can achieve a positive carbon balance, but feedlot systems generally offers both lower area requirements and GHG emissions per kilogram of meat produced than traditional systems. In this way, beef cattle production systems that associate well-managed grass systems, with the supply of diets in the finishing phase is an alternative to increase the productivity of the system, in addition to contributing to the reduction of GHG emissions per kg of meat produced. Cattle excreta are also sources of GHG emissions to the atmosphere, mainly nitrous oxide (N2O) and methane (CH4), but considerably less is known on their environmental impact. Thence, the objective of the study was to evaluate the enteric methane production from two breed compositions as well as GHG emissions from beef cattle excreta in a feedlot system. Methane production (kg/period) was 19% lower in Nellore (NEL) than Angus x Nellore crossbred (AN) in grazing, and no difference was observed in feedlot. The NEL had less CH4 intensity (CH4/BW) in grazing but greater CH4 per unit of ADG in the feedlot compared to AN. Breed composition did not influence the CH4 yield (CH4/DMI) in either phase, despite the difference in feedlot DMI (kg day-¹). Regarding to the GHG emission from excreta deposition, the occurrence of rainfall was determinant of very high N2O fluxes either for urine or feces. Individual excreta were characterized by a period of small but significant fluxes, followed by a period of indistinguishable fluxes at the background level, and then a third period after rainfall portrayed the large impact of excreta on GHG emissions from the feedlot. MenosBeef cattle is one of the main sources of GHG in the agricultural sector, however, it is possible to implement improvements in this segment to mitigate GHG emissions. Beef production in an integrated crop-livestock system can achieve a positive carbon balance, but feedlot systems generally offers both lower area requirements and GHG emissions per kilogram of meat produced than traditional systems. In this way, beef cattle production systems that associate well-managed grass systems, with the supply of diets in the finishing phase is an alternative to increase the productivity of the system, in addition to contributing to the reduction of GHG emissions per kg of meat produced. Cattle excreta are also sources of GHG emissions to the atmosphere, mainly nitrous oxide (N2O) and methane (CH4), but considerably less is known on their environmental impact. Thence, the objective of the study was to evaluate the enteric methane production from two breed compositions as well as GHG emissions from beef cattle excreta in a feedlot system. Methane production (kg/period) was 19% lower in Nellore (NEL) than Angus x Nellore crossbred (AN) in grazing, and no difference was observed in feedlot. The NEL had less CH4 intensity (CH4/BW) in grazing but greater CH4 per unit of ADG in the feedlot compared to AN. Breed composition did not influence the CH4 yield (CH4/DMI) in either phase, despite the difference in feedlot DMI (kg day-¹). Regarding to the GHG emission from excreta deposition, the occu... Mostrar Tudo |
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Palavras-Chave: |
Bovine excreta; Excreta bovina; Metano entérico. |
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Thesagro: |
Fezes; Gado de Corte; Metano. |
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Thesaurus Nal: |
Beef cattle; Methane. |
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Categoria do assunto: |
L Ciência Animal e Produtos de Origem Animal |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/226594/1/Greenhouse-gas.pdf
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Marc: |
LEADER 02740nam a2200277 a 4500
001 2134995
005 2021-10-02
008 2021 bl uuuu u00u1 u #d
020 $a978-65-994135-4-4
100 1 $aMACIEL, I. C. de F.
245 $aGreenhouse gas emissions by cattle reared in an integrated croplivestock system and finished in feedlot.$h[electronic resource]
260 $aIn: WORLD CONGRESS ON INTEGRATED CROP-LIVESTOCK-FORESTRY SYSTEMS, 2., 2021. Proceedings reference... Brasília, DF: Embrapa$c2021
300 $ap. 85-91.
500 $aWCCLF. Evento online.
520 $aBeef cattle is one of the main sources of GHG in the agricultural sector, however, it is possible to implement improvements in this segment to mitigate GHG emissions. Beef production in an integrated crop-livestock system can achieve a positive carbon balance, but feedlot systems generally offers both lower area requirements and GHG emissions per kilogram of meat produced than traditional systems. In this way, beef cattle production systems that associate well-managed grass systems, with the supply of diets in the finishing phase is an alternative to increase the productivity of the system, in addition to contributing to the reduction of GHG emissions per kg of meat produced. Cattle excreta are also sources of GHG emissions to the atmosphere, mainly nitrous oxide (N2O) and methane (CH4), but considerably less is known on their environmental impact. Thence, the objective of the study was to evaluate the enteric methane production from two breed compositions as well as GHG emissions from beef cattle excreta in a feedlot system. Methane production (kg/period) was 19% lower in Nellore (NEL) than Angus x Nellore crossbred (AN) in grazing, and no difference was observed in feedlot. The NEL had less CH4 intensity (CH4/BW) in grazing but greater CH4 per unit of ADG in the feedlot compared to AN. Breed composition did not influence the CH4 yield (CH4/DMI) in either phase, despite the difference in feedlot DMI (kg day-¹). Regarding to the GHG emission from excreta deposition, the occurrence of rainfall was determinant of very high N2O fluxes either for urine or feces. Individual excreta were characterized by a period of small but significant fluxes, followed by a period of indistinguishable fluxes at the background level, and then a third period after rainfall portrayed the large impact of excreta on GHG emissions from the feedlot.
650 $aBeef cattle
650 $aMethane
650 $aFezes
650 $aGado de Corte
650 $aMetano
653 $aBovine excreta
653 $aExcreta bovina
653 $aMetano entérico
700 1 $aALVARENGA, R. C.
700 1 $aCAMPANHA, M. M.
700 1 $aGONTIJO NETO, M. M.
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Registro original: |
Embrapa Milho e Sorgo (CNPMS) |
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Registro Completo
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Biblioteca(s): |
Embrapa Unidades Centrais. |
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Data corrente: |
22/08/2001 |
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Data da última atualização: |
27/09/2004 |
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Autoria: |
PINHEIRO, M. J. P.; SOUSA, R. P. de; ESPINDOLA, G. B. |
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Título: |
Efeitos da Adicao de Farelo de Vagem de Algaroba em Racoes para Suinos na Fase de Terminacao. |
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Ano de publicação: |
1993 |
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Fonte/Imprenta: |
Pesquisa Agropecuaria Brasileira, Brasilia, v.28, n.12, p.1443-1449,dez.1993 |
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Idioma: |
Português |
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Conteúdo: |
Foi realizado um experimento para avaliar os efeitos da inclusao de diferentes niveis de farelo de vagem de algaroba (Prosopis juliflora (S.W.) D.C.), em racoes isoproteicas e isoenergeticas para suinos na fase de terminacao sobre o desempenho e caracteristicas de carcaça. Foram utilizados 32 suínos mesticos Landrace x Large White com peso medio de 54,14 kg. O delineamento experimental foi o de blocos ao acaso, com quatro niveis de farelo de vagem de algaroba (0, 10, 20 e 30%), em dietas a base de milho e farelo de soja, com quatro repeticoes. A composicao quimica do farelo de vagem de algaroba (FVA) foi: 89,29% de materia seca; 8,02% de proteina bruta; 9,57% de fibra bruta; 0,71% de extrato etereo; 0,29% de calcio e 0,17% de fosforo. A analise de regressao evidenciou efeito linear decrescente (P<0,05) dos niveis de FVA sobre o ganho de peso e consumo de racao. Quanto as características de carcaca, foram evidenciados efeitos lineares crescentes (P<0,05) e (P<0,01) dos niveis de FVA sobre a espessura de toicinho e relacao gordura/carne, respectivamente. Com base na analise economica, nao foi viavel o uso de FVA com a suplementacao de oleo de soja em dietas de suinos em terminacao. |
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Palavras-Chave: |
desempenho. |
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Thesagro: |
Carcaça; Prosopis Juliflora. |
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Categoria do assunto: |
-- |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/AI-SEDE/20593/1/pab14_dez_93.pdf
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Marc: |
LEADER 01757naa a2200181 a 4500
001 1105509
005 2004-09-27
008 1993 bl uuuu u00u1 u #d
100 1 $aPINHEIRO, M. J. P.
245 $aEfeitos da Adicao de Farelo de Vagem de Algaroba em Racoes para Suinos na Fase de Terminacao.
260 $c1993
520 $aFoi realizado um experimento para avaliar os efeitos da inclusao de diferentes niveis de farelo de vagem de algaroba (Prosopis juliflora (S.W.) D.C.), em racoes isoproteicas e isoenergeticas para suinos na fase de terminacao sobre o desempenho e caracteristicas de carcaça. Foram utilizados 32 suínos mesticos Landrace x Large White com peso medio de 54,14 kg. O delineamento experimental foi o de blocos ao acaso, com quatro niveis de farelo de vagem de algaroba (0, 10, 20 e 30%), em dietas a base de milho e farelo de soja, com quatro repeticoes. A composicao quimica do farelo de vagem de algaroba (FVA) foi: 89,29% de materia seca; 8,02% de proteina bruta; 9,57% de fibra bruta; 0,71% de extrato etereo; 0,29% de calcio e 0,17% de fosforo. A analise de regressao evidenciou efeito linear decrescente (P<0,05) dos niveis de FVA sobre o ganho de peso e consumo de racao. Quanto as características de carcaca, foram evidenciados efeitos lineares crescentes (P<0,05) e (P<0,01) dos niveis de FVA sobre a espessura de toicinho e relacao gordura/carne, respectivamente. Com base na analise economica, nao foi viavel o uso de FVA com a suplementacao de oleo de soja em dietas de suinos em terminacao.
650 $aCarcaça
650 $aProsopis Juliflora
653 $adesempenho
700 1 $aSOUSA, R. P. de
700 1 $aESPINDOLA, G. B.
773 $tPesquisa Agropecuaria Brasileira, Brasilia$gv.28, n.12, p.1443-1449,dez.1993
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