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1. | | KATO, O. R.; LUNZ, A. M.; BISPO, C. J. C.; CARVALHO, C. J. R. de; MIRANDA, I. de S.; TAKAMATSU, J.; MAUES, M. M.; GERHARD, P.; AZEVEDO, R. de; VASCONCELOS, S. S.; HONHWARD, S; LEMOS, W. de P. Projeto Dendê: sistemas agroflorestais na agricultura familiar. 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. 1 CD-ROM. Biblioteca(s): Embrapa Amazônia Oriental. |
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Registro Completo
Biblioteca(s): |
Embrapa Meio Ambiente. |
Data corrente: |
30/12/2015 |
Data da última atualização: |
10/10/2016 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Circulação/Nível: |
B - 1 |
Autoria: |
NASCIMENTO, C. F. M. do; BERNDT, A.; ROMERO, L. A.; MEYER, P. M.; FRIGHETTO, R. T. S.; DEMARCHI, J. J. A. de A.; RODRIGUES, P. H. M. |
Afiliação: |
CAROLINA FERNANDA MOYSES DO NASCIMENTO, FMVZ-USP; ALEXANDRE BERNDT, CPPSE; LAURA ALEXANDRA ROMERO, FMVZ-USP; PAULA MARQUES MEYER, IBGE; ROSA TOYOKO SHIRAISHI FRIGHETTO, CNPMA; JOÃO JOSÉ ASSUMPÇÃO DE ABREU DEMARCHI, IZ Nova Odessa; PAULO HENRIQUE MAZZA RODRIGUES, FMVZ-USP. |
Título: |
Methane emission of cattle fed Urochloa brizantha hay harvested at different stages. |
Ano de publicação: |
2016 |
Fonte/Imprenta: |
Journal of Agricultural Science, Toronto, v. 8, n. 1 p. 163-174, 2016. |
ISSN: |
1916-9760 |
Idioma: |
Inglês |
Conteúdo: |
Abstract: The objective of this trial was to assess the methane emission rate, as well as the digestibility and ruminal fermentation parameters in animals fed Urochloa brizantha hay harvested at different stages of growth. Six Nellore rumen-cannulated steers (402.0 ± 51.62 kg) were assigned to a replicated 3×3 Latin square (18 experimental units). Treatments differed according to three growth stages of the forage: 15 - hay with 15 days of growth, 45 - hay with 45 days of growth and 90 - hay with 90 days of growth. Each experimental period lasted 21 days. From the 8th day, feces were sampled during 5 days to determine apparent total digestibility of dry matter and its fractions. Beginning on the 13th day and running for 7 days, methane production was evaluated using the sulfur hexafluoride (SF6) tracer technique. On the 20th day, ruminal fluid was sampled prior to and after 2, 4, 6, 8 and 10 hours post-morning feeding for evaluating pH, ammonia-N and short-chain fatty acids (SCFA). As the stage of forage growth for harvesting advanced in days, the digestibility coefficient of crude protein decreased and non-fibrous carbohydrate values increased. Methane production was affected not only by the stage of forage growth, but also by quality of its conservation after harvesting. There were significant differences among treatments when methane was expressed in g kg-1 DMI, g kg-1 OMI, % GE and % DE, with non-linear effect. The stage of forage growth did not influence ruminal pH, total concentration or molar proportion of SCFA, but decreased NH3-N concentration. MenosAbstract: The objective of this trial was to assess the methane emission rate, as well as the digestibility and ruminal fermentation parameters in animals fed Urochloa brizantha hay harvested at different stages of growth. Six Nellore rumen-cannulated steers (402.0 ± 51.62 kg) were assigned to a replicated 3×3 Latin square (18 experimental units). Treatments differed according to three growth stages of the forage: 15 - hay with 15 days of growth, 45 - hay with 45 days of growth and 90 - hay with 90 days of growth. Each experimental period lasted 21 days. From the 8th day, feces were sampled during 5 days to determine apparent total digestibility of dry matter and its fractions. Beginning on the 13th day and running for 7 days, methane production was evaluated using the sulfur hexafluoride (SF6) tracer technique. On the 20th day, ruminal fluid was sampled prior to and after 2, 4, 6, 8 and 10 hours post-morning feeding for evaluating pH, ammonia-N and short-chain fatty acids (SCFA). As the stage of forage growth for harvesting advanced in days, the digestibility coefficient of crude protein decreased and non-fibrous carbohydrate values increased. Methane production was affected not only by the stage of forage growth, but also by quality of its conservation after harvesting. There were significant differences among treatments when methane was expressed in g kg-1 DMI, g kg-1 OMI, % GE and % DE, with non-linear effect. The stage of forage growth did not influence ruminal pH, tota... Mostrar Tudo |
Palavras-Chave: |
Enteric methane; Metabolic cage; Short-chain fatty acids; Tracer technique. |
Thesagro: |
Feno; Fermentação; Gado de corte; Metano; Nutrição animal; Ruminação. |
Thesaurus NAL: |
Beef cattle; Methane; sulfur hexafluoride; Tracer techniques. |
Categoria do assunto: |
P Recursos Naturais, Ciências Ambientais e da Terra |
Marc: |
LEADER 02640naa a2200373 a 4500 001 2032687 005 2016-10-10 008 2016 bl --- 0-- u #d 022 $a1916-9760 100 1 $aNASCIMENTO, C. F. M. do 245 $aMethane emission of cattle fed Urochloa brizantha hay harvested at different stages.$h[electronic resource] 260 $c2016 520 $aAbstract: The objective of this trial was to assess the methane emission rate, as well as the digestibility and ruminal fermentation parameters in animals fed Urochloa brizantha hay harvested at different stages of growth. Six Nellore rumen-cannulated steers (402.0 ± 51.62 kg) were assigned to a replicated 3×3 Latin square (18 experimental units). Treatments differed according to three growth stages of the forage: 15 - hay with 15 days of growth, 45 - hay with 45 days of growth and 90 - hay with 90 days of growth. Each experimental period lasted 21 days. From the 8th day, feces were sampled during 5 days to determine apparent total digestibility of dry matter and its fractions. Beginning on the 13th day and running for 7 days, methane production was evaluated using the sulfur hexafluoride (SF6) tracer technique. On the 20th day, ruminal fluid was sampled prior to and after 2, 4, 6, 8 and 10 hours post-morning feeding for evaluating pH, ammonia-N and short-chain fatty acids (SCFA). As the stage of forage growth for harvesting advanced in days, the digestibility coefficient of crude protein decreased and non-fibrous carbohydrate values increased. Methane production was affected not only by the stage of forage growth, but also by quality of its conservation after harvesting. There were significant differences among treatments when methane was expressed in g kg-1 DMI, g kg-1 OMI, % GE and % DE, with non-linear effect. The stage of forage growth did not influence ruminal pH, total concentration or molar proportion of SCFA, but decreased NH3-N concentration. 650 $aBeef cattle 650 $aMethane 650 $asulfur hexafluoride 650 $aTracer techniques 650 $aFeno 650 $aFermentação 650 $aGado de corte 650 $aMetano 650 $aNutrição animal 650 $aRuminação 653 $aEnteric methane 653 $aMetabolic cage 653 $aShort-chain fatty acids 653 $aTracer technique 700 1 $aBERNDT, A. 700 1 $aROMERO, L. A. 700 1 $aMEYER, P. M. 700 1 $aFRIGHETTO, R. T. S. 700 1 $aDEMARCHI, J. J. A. de A. 700 1 $aRODRIGUES, P. H. M. 773 $tJournal of Agricultural Science, Toronto$gv. 8, n. 1 p. 163-174, 2016.
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