| |
|
|
 | Acesso ao texto completo restrito à biblioteca da Embrapa Gado de Leite. Para informações adicionais entre em contato com cnpgl.biblioteca@embrapa.br. |
|
Registro Completo |
|
Biblioteca(s): |
Embrapa Gado de Leite. |
|
Data corrente: |
17/02/2017 |
|
Data da última atualização: |
30/01/2023 |
|
Tipo da produção científica: |
Artigo em Periódico Indexado |
|
Autoria: |
CUNHA, C. S.; LOPES, N. L.; VELOSO, C. M.; JACOVINE, L. A. G.; TOMICH, T. R.; PEREIRA, L. G. R.; MARCONDES, M. I. |
|
Afiliação: |
C. S. CUNHA, UFV/VIÇOSA; N. L. LOPES, UFV/VIÇOSA; C. M. VELOSO, UFV/VIÇOSA; L. A. G. JACOVINE, UFV/VIÇOSA; THIERRY RIBEIRO TOMICH, CNPGL; LUIZ GUSTAVO RIBEIRO PEREIRA, CNPGL; M. I. MARCONDES, UFV/VIÇOSA. |
|
Título: |
Greenhouse gases inventory and carbon balance of two dairy systems obtained from two methane-estimation methods. |
|
Ano de publicação: |
2016 |
|
Fonte/Imprenta: |
Science of The Total Environment, v. 571, p. 744-754, 2016. |
|
Idioma: |
Inglês |
|
Conteúdo: |
Abstract The adoption of carbon inventories for dairy farms in tropical countries based on models developed from animals and diets of temperate climates is questionable. Thus, the objectives of this study were to estimate enteric methane (CH4) emissions through the SF6 tracer gas technique and through equations proposed by the Intergovernmental Panel on Climate Change (IPCC) Tier 2 and to calculate the inventory of greenhouse gas (GHG) emissions from two dairy systems. In addition, the carbon balance of these properties was estimated using enteric CH4 emissions obtained using both methodologies. In trial 1, the CH4 emissions were estimated from seven Holstein dairy cattle categories based on the SF6 tracer gas technique and on IPCC equations. The categories used in the study were prepubertal heifers (n = 6); pubertal heifers (n = 4); pregnant heifers (n = 5); high-producing (n = 6); medium-producing (n = 5); low-producing (n = 4) and dry cows (n = 5). Enteric methane emission was higher for the category comprising prepubertal heifers when estimated by the equations proposed by the IPCC Tier 2. However, higher CH4 emissions were estimated by the SF6 technique in the categories including medium- and high-producing cows and dry cows. Pubertal heifers, pregnant heifers, and low-producing cows had equal CH4 emissions as estimated by both methods. In trial 2, two dairy farms were monitored for one year to identify all activities that contributed in any way to GHG emissions. The total emission from Farm 1 was 3.21 t CO2e/animal/yr, of which 1.63 t corresponded to enteric CH4. Farm 2 emitted 3.18 t CO2e/animal/yr, with 1.70 t of enteric CH4. IPCC estimations can underestimate CH4 emissions from some categories while overestimate others. However, considering the whole property, these discrepancies are offset and we would submit that the equations suggested by the IPCC properly estimate the total CH4 emission and carbon balance of the properties. Thus, the IPCC equations should be utilized with caution, and the herd composition should be analysed at the property level. When the carbon stock in pasture and other crops was considered, the carbon balance suggested that both farms are sustainable for GHG, by both methods. On the other hand, carbon balance without carbon stock, by both methods, suggests that farms emit more carbon than the system is capable of stock. MenosAbstract The adoption of carbon inventories for dairy farms in tropical countries based on models developed from animals and diets of temperate climates is questionable. Thus, the objectives of this study were to estimate enteric methane (CH4) emissions through the SF6 tracer gas technique and through equations proposed by the Intergovernmental Panel on Climate Change (IPCC) Tier 2 and to calculate the inventory of greenhouse gas (GHG) emissions from two dairy systems. In addition, the carbon balance of these properties was estimated using enteric CH4 emissions obtained using both methodologies. In trial 1, the CH4 emissions were estimated from seven Holstein dairy cattle categories based on the SF6 tracer gas technique and on IPCC equations. The categories used in the study were prepubertal heifers (n = 6); pubertal heifers (n = 4); pregnant heifers (n = 5); high-producing (n = 6); medium-producing (n = 5); low-producing (n = 4) and dry cows (n = 5). Enteric methane emission was higher for the category comprising prepubertal heifers when estimated by the equations proposed by the IPCC Tier 2. However, higher CH4 emissions were estimated by the SF6 technique in the categories including medium- and high-producing cows and dry cows. Pubertal heifers, pregnant heifers, and low-producing cows had equal CH4 emissions as estimated by both methods. In trial 2, two dairy farms were monitored for one year to identify all activities that contributed in any way to GHG emissions. The to... Mostrar Tudo |
|
Palavras-Chave: |
Carbon equivalent; Methane emission. |
|
Thesaurus Nal: |
dairy cattle; greenhouse gases; milk production; ruminants. |
|
Categoria do assunto: |
L Ciência Animal e Produtos de Origem Animal |
|
Marc: |
null
Download
Esconder MarcMostrar Marc Completo |
|
Registro original: |
Embrapa Gado de Leite (CNPGL) |
|
|
Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
URL |
Voltar
|
|
|
| Registros recuperados : 4 | |
| 1. |  | ROCHA, N. A. S.; LEÃO, B. C. S.; NOGUEIRA, E.; MINGOTI, G. Z. Bovine embryos cultured in vitro in the presence of antioxidants: implications for blastocysts development, quality and cryotolerance. In: INTERNATIONAL SYMPOSIUM ON ANIMAL BIOLOGY OF REPRODUCTION, 4. Animal Reproduction, v.9, n.4, p.829, 2012. (ISABR 2012).| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Pantanal. |
|    |
| 2. | | ROCHA, N. A. S.; LEÃO, B. C. S.; NOGUEIRA, E.; MINGOTI, G. Z. Supplementation with antioxidants during maturation increases resistance to oxidative stress in bovine embryos pruduced in vitro but does not improve cryotolerance. Animal Reproduction, v. 9. n. 3. p. 681, jul/set, 2012. Publicado no: Proceedings of the 26th Annual Meeting of the Brazilian Embryo Technology Society (SBTE), August 30th to September 2nd, 2012, Foz do Iguaçu, PR, Brazil.| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Pantanal. |
| |
| 3. | | ROCHA, N. A. S.; LEÃO, B. C. S.; ACCORSI, M. F.; NOGUEIRA, E.; MINGOTI, G. Z. Levels of reactive oxygen species (Ros), apoptosis and cryoresistance of bovine embryos culture in the presence of antioxidants. In: REUNIÃO ANUAL DA SOCIEDADE BRASILEIRA DE TECNOLOGIA DE EMBRIÕES, 26., 2012, Foz do Iguaçu. Anais. Belo Horizonte: CBRA, 2012.| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Pantanal. |
| |
| 4. | | LEÃO, B. C. S.; NOGUEIRA, E.; ROCHA, N. A. S.; ACCORSI, M. F.; NEVES, T. V.; MARCOS, M. T. S.; CUNHA JUNIOR, G. F.; MINGOTI, G. Z. Nutritional supplementation of nelore heifers with polyunsaturated fatty acids do not interfere in the development and cryotolerance of in vitro produced embryos. In: REUNIÃO ANUAL DA SOCIEDADE BRASILEIRA DE TECNOLOGIA DE EMBRIÕES, 26., 2012, Foz do Iguaçu. Anais. Belo Horizonte: CBRA, 2012.| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Pantanal. |
| |
| Registros recuperados : 4 | |
|
| Nenhum registro encontrado para a expressão de busca informada. |
|
|
