Greenhouse gas emissions by cattle reared in an integrated croplivestock system and finished in feedlot.
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.
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Format: | Anais e Proceedings de eventos biblioteca |
Language: | Ingles English |
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2021-10-02
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Subjects: | Bovine excreta, Metano entérico, Excreta bovina, Gado de Corte, Fezes, Metano, Methane, Beef cattle, |
Online Access: | http://www.alice.cnptia.embrapa.br/alice/handle/doc/1134995 |
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dig-alice-doc-11349952021-10-03T02:04:36Z Greenhouse gas emissions by cattle reared in an integrated croplivestock system and finished in feedlot. MACIEL, I. C. de F. ALVARENGA, R. C. CAMPANHA, M. M. GONTIJO NETO, M. M. ISABELLA CRISTINA DE FARIA MACIEL; RAMON COSTA ALVARENGA, CNPMS; MONICA MATOSO CAMPANHA, CNPMS; MIGUEL MARQUES GONTIJO NETO, CNPMS. Bovine excreta Metano entérico Excreta bovina Gado de Corte Fezes Metano Methane Beef cattle 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. WCCLF. Evento online. 2021-10-03T02:04:27Z 2021-10-03T02:04:27Z 2021-10-02 2021 Anais e Proceedings de eventos In: WORLD CONGRESS ON INTEGRATED CROP-LIVESTOCK-FORESTRY SYSTEMS, 2., 2021. Proceedings reference... Brasília, DF: Embrapa, 2021. 978-65-994135-4-4 http://www.alice.cnptia.embrapa.br/alice/handle/doc/1134995 Ingles en openAccess p. 85-91. |
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Bovine excreta Metano entérico Excreta bovina Gado de Corte Fezes Metano Methane Beef cattle Bovine excreta Metano entérico Excreta bovina Gado de Corte Fezes Metano Methane Beef cattle |
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Bovine excreta Metano entérico Excreta bovina Gado de Corte Fezes Metano Methane Beef cattle Bovine excreta Metano entérico Excreta bovina Gado de Corte Fezes Metano Methane Beef cattle MACIEL, I. C. de F. ALVARENGA, R. C. CAMPANHA, M. M. GONTIJO NETO, M. M. Greenhouse gas emissions by cattle reared in an integrated croplivestock system and finished in feedlot. |
description |
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. |
author2 |
ISABELLA CRISTINA DE FARIA MACIEL; RAMON COSTA ALVARENGA, CNPMS; MONICA MATOSO CAMPANHA, CNPMS; MIGUEL MARQUES GONTIJO NETO, CNPMS. |
author_facet |
ISABELLA CRISTINA DE FARIA MACIEL; RAMON COSTA ALVARENGA, CNPMS; MONICA MATOSO CAMPANHA, CNPMS; MIGUEL MARQUES GONTIJO NETO, CNPMS. MACIEL, I. C. de F. ALVARENGA, R. C. CAMPANHA, M. M. GONTIJO NETO, M. M. |
format |
Anais e Proceedings de eventos |
topic_facet |
Bovine excreta Metano entérico Excreta bovina Gado de Corte Fezes Metano Methane Beef cattle |
author |
MACIEL, I. C. de F. ALVARENGA, R. C. CAMPANHA, M. M. GONTIJO NETO, M. M. |
author_sort |
MACIEL, I. C. de F. |
title |
Greenhouse gas emissions by cattle reared in an integrated croplivestock system and finished in feedlot. |
title_short |
Greenhouse gas emissions by cattle reared in an integrated croplivestock system and finished in feedlot. |
title_full |
Greenhouse gas emissions by cattle reared in an integrated croplivestock system and finished in feedlot. |
title_fullStr |
Greenhouse gas emissions by cattle reared in an integrated croplivestock system and finished in feedlot. |
title_full_unstemmed |
Greenhouse gas emissions by cattle reared in an integrated croplivestock system and finished in feedlot. |
title_sort |
greenhouse gas emissions by cattle reared in an integrated croplivestock system and finished in feedlot. |
publishDate |
2021-10-02 |
url |
http://www.alice.cnptia.embrapa.br/alice/handle/doc/1134995 |
work_keys_str_mv |
AT macielicdef greenhousegasemissionsbycattlerearedinanintegratedcroplivestocksystemandfinishedinfeedlot AT alvarengarc greenhousegasemissionsbycattlerearedinanintegratedcroplivestocksystemandfinishedinfeedlot AT campanhamm greenhousegasemissionsbycattlerearedinanintegratedcroplivestocksystemandfinishedinfeedlot AT gontijonetomm greenhousegasemissionsbycattlerearedinanintegratedcroplivestocksystemandfinishedinfeedlot |
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1756027749044060160 |