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Registro Completo |
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Biblioteca(s): |
Embrapa Florestas. |
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Data corrente: |
27/06/2005 |
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Data da última atualização: |
20/06/2006 |
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Autoria: |
GARCIA, L. C.; LIMA, D. de; AZEVEDO, C. P. de. |
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Título: |
Fenologia de espécies arbóreas, para coleta de sementes "in situ", na Amazônia Ocidental. |
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Ano de publicação: |
1999 |
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Fonte/Imprenta: |
In: INTERNATIONAL CONGRESS AND EXHIBITION ON FOREST, 5., 1999, Curitiba. Forest 99: [resumos]. Rio de Janeiro: BIOSFERA, 1999. |
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Idioma: |
Português |
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Notas: |
1 CD-ROM. Autoria bilíngue: CONGRESSO E EXPOSICAO INTERNACIONAL SOBRE FLORESTAS, 5., 1999, Curitiba. |
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Categoria do assunto: |
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Marc: |
LEADER 00605naa a2200145 a 4500
001 1310940
005 2006-06-20
008 1999 bl uuuu u00u1 u #d
100 1 $aGARCIA, L. C.
245 $aFenologia de espécies arbóreas, para coleta de sementes "in situ", na Amazônia Ocidental.
260 $c1999
500 $a1 CD-ROM. Autoria bilíngue: CONGRESSO E EXPOSICAO INTERNACIONAL SOBRE FLORESTAS, 5., 1999, Curitiba.
700 1 $aLIMA, D. de
700 1 $aAZEVEDO, C. P. de
773 $tIn: INTERNATIONAL CONGRESS AND EXHIBITION ON FOREST, 5., 1999, Curitiba. Forest 99: [resumos]. Rio de Janeiro: BIOSFERA, 1999.
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Registro original: |
Embrapa Florestas (CNPF) |
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 | 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
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Biblioteca(s): |
Embrapa Gado de Leite. |
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Data corrente: |
14/02/2017 |
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Data da última atualização: |
30/01/2023 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
A - 1 |
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Autoria: |
OSS, D. B.; MARCONDES, M. I.; MACHADO, F. S.; PEREIRA, L. G. R.; TOMICH, T. R.; RIBEIRO JR. G. O.; CHIZZOTTI, M. L.; FERREIRA, A. L.; CAMPOS, M. M.; MAURÍCIO, R. M.; CHAVES, A. V.; McALLISTER, T. A. |
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Afiliação: |
Daniela B. Oss, UFV; CAPES; Marcos I. Marcondes, UFV; FERNANDA SAMARINI MACHADO, CNPGL; LUIZ GUSTAVO RIBEIRO PEREIRA, CNPGL; THIERRY RIBEIRO TOMICH, CNPGL; Gabriel O. Ribeiro Jr., CAPES; , Agriculture and Agri-Food Canada; Mario Luiz Chizzotti, UFV; Alexandre L. Ferreira, UFSJ; MARIANA MAGALHAES CAMPOS, CNPGL; Rogério M. Maurício, UFSJ; Alex V. Chaves, Faculty of Veterinary Science, Sydney; Tim A. McAllister, Agriculture and Agri-Food Canada. |
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Título: |
An evaluation of the face mask system based on short-term measurements compared with the sulfur hexafluoride (SF6) tracer, and respiration chamber techniques for measuring CH4 emissions. |
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Ano de publicação: |
2016 |
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Fonte/Imprenta: |
Animal Feed Science and Technology, v. 216, p. 49-57, 2016. |
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Idioma: |
Inglês |
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Conteúdo: |
The objective of the present study was to compare the shortterm measurement(30 min/day for 3 days) face mask system (FM), with SF6 tracer and respiration chamber (RC) techniques for measuring CH4 emissions from crossbred (Holstein × Gyr) yearling bulls fed at three intake levels. Data were derived from 17 individuals in a completely randomized design experiment in a repeated measures scheme. Bulls were fed a diet consisting of 59.6% corn silage and 40.4% concentrate on a DM basis at three levels of DM intake (DMI) of 1.2% of BW, 1.8% of BW and ad libitum. After an adaptation period, CH4 emissions were measured first using the SF6 tracer technique, followed by the FM and RC techniques, respectively. Daily CH4 emission (g/day) from bulls differed (P < 0.007) with CH4 measurements techniques, with highest emissions measured using RC (107.9 ± 15.36), followed by FM (103.2 ± 11.86) then SF6 tracer technique (87.9 ± 10.16). The CH4 emissions adjusted for differences in DMI and BW did not differ among techniques, averaging 21.5 g/kg DMI and 0.4 g/kg BW, respectively. Total CH4 emissions (g/day) were positively correlated with DMI as measured by all three techniques (SF6 r = 0.93; FM r = 0.93; RC r = 0.96). The concordance correlation coefficient (CCC) for CH4 emission (g/d) were 0.82, 0.82 and 0.74 for comparisons of SF6 vs RC, FM vs RC and FM vs SF6, respectively. The day-to-day (21.3%) and animal-to-animal (13.4%) variation in CH4 yield (g/kg DMI) was greater from bulls using the FM technique, compared to SF6 (18.8% and 6.8%, respectively) and RC (12.9% and 7.5%, respectively) techniques. We conclude that the short-term FM technique generated CH4 measurements that were comparable to those estimated using SF6 and chamber techniques across a range of DMI levels. However, the FM method may have limitations in terms of assessing enteric CH4 mitigation strategies that are applied over a short duration to low numbers of animals due to higher animal-to-animal and day-to-day coefficients of variation than either the SF6 or RC techniques. MenosThe objective of the present study was to compare the shortterm measurement(30 min/day for 3 days) face mask system (FM), with SF6 tracer and respiration chamber (RC) techniques for measuring CH4 emissions from crossbred (Holstein × Gyr) yearling bulls fed at three intake levels. Data were derived from 17 individuals in a completely randomized design experiment in a repeated measures scheme. Bulls were fed a diet consisting of 59.6% corn silage and 40.4% concentrate on a DM basis at three levels of DM intake (DMI) of 1.2% of BW, 1.8% of BW and ad libitum. After an adaptation period, CH4 emissions were measured first using the SF6 tracer technique, followed by the FM and RC techniques, respectively. Daily CH4 emission (g/day) from bulls differed (P < 0.007) with CH4 measurements techniques, with highest emissions measured using RC (107.9 ± 15.36), followed by FM (103.2 ± 11.86) then SF6 tracer technique (87.9 ± 10.16). The CH4 emissions adjusted for differences in DMI and BW did not differ among techniques, averaging 21.5 g/kg DMI and 0.4 g/kg BW, respectively. Total CH4 emissions (g/day) were positively correlated with DMI as measured by all three techniques (SF6 r = 0.93; FM r = 0.93; RC r = 0.96). The concordance correlation coefficient (CCC) for CH4 emission (g/d) were 0.82, 0.82 and 0.74 for comparisons of SF6 vs RC, FM vs RC and FM vs SF6, respectively. The day-to-day (21.3%) and animal-to-animal (13.4%) variation in CH4 yield (g/kg DMI) was greater from bulls using the... Mostrar Tudo |
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Palavras-Chave: |
Face mask; Respiration chamber; Short-term measurement. |
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Thesaurus NAL: |
methane; sulfur hexafluoride. |
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Categoria do assunto: |
L Ciência Animal e Produtos de Origem Animal |
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Marc: |
LEADER 03070naa a2200313 a 4500
001 2064073
005 2023-01-30
008 2016 bl uuuu u00u1 u #d
100 1 $aOSS, D. B.
245 $aAn evaluation of the face mask system based on short-term measurements compared with the sulfur hexafluoride (SF6) tracer, and respiration chamber techniques for measuring CH4 emissions.$h[electronic resource]
260 $c2016
520 $aThe objective of the present study was to compare the shortterm measurement(30 min/day for 3 days) face mask system (FM), with SF6 tracer and respiration chamber (RC) techniques for measuring CH4 emissions from crossbred (Holstein × Gyr) yearling bulls fed at three intake levels. Data were derived from 17 individuals in a completely randomized design experiment in a repeated measures scheme. Bulls were fed a diet consisting of 59.6% corn silage and 40.4% concentrate on a DM basis at three levels of DM intake (DMI) of 1.2% of BW, 1.8% of BW and ad libitum. After an adaptation period, CH4 emissions were measured first using the SF6 tracer technique, followed by the FM and RC techniques, respectively. Daily CH4 emission (g/day) from bulls differed (P < 0.007) with CH4 measurements techniques, with highest emissions measured using RC (107.9 ± 15.36), followed by FM (103.2 ± 11.86) then SF6 tracer technique (87.9 ± 10.16). The CH4 emissions adjusted for differences in DMI and BW did not differ among techniques, averaging 21.5 g/kg DMI and 0.4 g/kg BW, respectively. Total CH4 emissions (g/day) were positively correlated with DMI as measured by all three techniques (SF6 r = 0.93; FM r = 0.93; RC r = 0.96). The concordance correlation coefficient (CCC) for CH4 emission (g/d) were 0.82, 0.82 and 0.74 for comparisons of SF6 vs RC, FM vs RC and FM vs SF6, respectively. The day-to-day (21.3%) and animal-to-animal (13.4%) variation in CH4 yield (g/kg DMI) was greater from bulls using the FM technique, compared to SF6 (18.8% and 6.8%, respectively) and RC (12.9% and 7.5%, respectively) techniques. We conclude that the short-term FM technique generated CH4 measurements that were comparable to those estimated using SF6 and chamber techniques across a range of DMI levels. However, the FM method may have limitations in terms of assessing enteric CH4 mitigation strategies that are applied over a short duration to low numbers of animals due to higher animal-to-animal and day-to-day coefficients of variation than either the SF6 or RC techniques.
650 $amethane
650 $asulfur hexafluoride
653 $aFace mask
653 $aRespiration chamber
653 $aShort-term measurement
700 1 $aMARCONDES, M. I.
700 1 $aMACHADO, F. S.
700 1 $aPEREIRA, L. G. R.
700 1 $aTOMICH, T. R.
700 1 $aRIBEIRO JR. G. O.
700 1 $aCHIZZOTTI, M. L.
700 1 $aFERREIRA, A. L.
700 1 $aCAMPOS, M. M.
700 1 $aMAURÍCIO, R. M.
700 1 $aCHAVES, A. V.
700 1 $aMcALLISTER, T. A.
773 $tAnimal Feed Science and Technology$gv. 216, p. 49-57, 2016.
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