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| Registros recuperados : 9 | |
| 1. |  | RODRIGUES, P. H. M.; GOMES, R. da C.; SIQUEIRA, R. F. de; MEYER, P. M.; RODRIGUES, R. R. Acurácia, precisão e robustez das estimativas da digestibilidade aparente da matéria seca determinada com o uso de indicadores em ovinos. Revista Brasileira de Zootecnia, Viçosa, v. 39, n. 5, p. 118-1126, 2010.| Biblioteca(s): Embrapa Caprinos e Ovinos. |
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| 2. | | GOMES, R. da C.; MEYER, P. M.; CASTRO, A. L. de; NETTO, A. S.; RODRIGUES, P. H. M. Accuracy, precision and robustness of different methods to obtain samples from silages in fermentation studies. Revista Brasileira de Zootecnia, v.41, n.6, p.1369-1377, 2012.| Biblioteca(s): Embrapa Gado de Corte. |
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| 3. | | RODRIGUES, P. H. M.; GOMES, R. da C.; MEYER, P. M.; BORGATTI, L. M. O.; FRANCO, F. M. J.; GODOY, G. L. A. de. Effects of microbial inoculants and amino acid production by-product on fermentation and chemical composition of sugarcane silages. Revista Brasileira de Zootecnia, v.41, n.6, p.1394-1400, 2012.| Biblioteca(s): Embrapa Gado de Corte. |
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| 4. | | 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. Methane emission of cattle fed Urochloa brizantha hay harvested at different stages. Journal of Agricultural Science, Toronto, v. 8, n. 1 p. 163-174, 2016.| Biblioteca(s): Embrapa Pecuária Sudeste. |
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| 5. | | 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. Methane emission of cattle fed Urochloa brizantha hay harvested at different stages. Journal of Agricultural Science, Toronto, v. 8, n. 1 p. 163-174, 2016.| Biblioteca(s): Embrapa Meio Ambiente. |
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| 6. | | COLDEBELLA, A.; MACHADO, P. F.; DEMÉTRIO, C. G. B.; RIBEIRO JÚNIOR, P. J.; CORASSIN, C. H.; MEYER, P. M.; CASSOLI, L. D. Contagem de células somáticas e produção de leite em vacas holandesas de alta produção. Pesquisa Agropecuária Brasileira, Brasília, DF, v. 38, n. 12, p. 1451-1457, dez. 2003 Título em inglês: Somatic cells count and milk yield in high production Holstein cows.| Biblioteca(s): Embrapa Unidades Centrais. |
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| 7. | | PERNA JUNIOR, F.; ZAPATA VÁSQUEZ, D. C.; GARDINAL, R.; MEYER, P. M.; BERNDT, A.; FRIGHETTO, R. T. S.; DEMARCHI, J. J. A. de A.; RODRIGUES, P. H. M. Short-term use of monensin and tannins as feed additives on digestibility and methanogenesis in cattle. Revista Brasileira de Zootecnia, v. 49, e20190098, 2020 9 p.| Biblioteca(s): Embrapa Pecuária Sudeste. |
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| 8. | | PERNA JR, F.; MARINO, C. T.; PINEDO, L. A.; CASSIANO, E. C. O.; MARTINS, M. F.; SOLÓRZANO, L. A. R.; MEYER, P. M.; FRIGHETTO, R. T. S.; BERNDT, A.; RODRIGUES, P. H. M. Effect of Feed additives on methane production as determined by the tracer technique SF6 in bovines. In: INTERNATIONAL CONFERENCE ON SUSTAINABLE ANIMAL AGRICULTURE FOR DEVELOPING COUNTRIES, 4., 2013, Lanzhou, China. Proceedings... lanzhou: Lanzanhou University, 2013. p. 358-359| Biblioteca(s): Embrapa Pecuária Sudeste. |
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| 9. | | PERNA JÚNIOR, F.; PINEDO, L. A.; MARINO, C. T.; CASSIANO, E. C. O.; MARTINS, M. F.; SOLÓRZANO, L. A. R.; MEYER, P. M.; FRIGHETTO, R. T. S.; BERNDT, A.; RODRIGUES, P. H. M. Effect of feed additives on methane production as determined by the tracer technique SF6 in bovines. In: INTERNATIONAL CONFERENCE ON SUSTAINABLE ANIMAL AGRICULTURE FOR DEVELOPING COUNTRIES, 4., 2013, Lanzhou, China. Proceedings... lanzhou: Lanzanhou University, 2013. p. 358-359| Biblioteca(s): Embrapa Meio Ambiente. |
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| Registros recuperados : 9 | |
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Registro Completo
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Biblioteca(s): |
Embrapa Gado de Corte. |
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Data corrente: |
07/03/2013 |
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Data da última atualização: |
07/03/2013 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
B - 1 |
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Autoria: |
GOMES, R. da C.; MEYER, P. M.; CASTRO, A. L. de; NETTO, A. S.; RODRIGUES, P. H. M. |
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Afiliação: |
RODRIGO DA COSTA GOMES, CNPGC; Paula Marques Meyer, IBGE; Ari Luiz de Castro, Departamento de Nutrição e Produção Animal, FMVZ/USP.; Arlindo Saran Netto, Departamento de Zootecnia, FZEA/USP; Paulo Henrique Mazza Rodrigues, Departamento de Nutrição e Produção Animal, FMVZ/USP. |
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Título: |
Accuracy, precision and robustness of different methods to obtain samples from silages in fermentation studies. |
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Ano de publicação: |
2012 |
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Fonte/Imprenta: |
Revista Brasileira de Zootecnia, v.41, n.6, p.1369-1377, 2012. |
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Idioma: |
Inglês |
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Conteúdo: |
The objective of this study was to evaluate accuracy, precision and robustness of two methods to obtain silage samples, in comparison with extraction of liquor by manual screw-press. Wet brewery residue alone or combined with soybean hulls and citrus pulp were ensiled in laboratory silos. Liquor was extracted by a manual screw-press and a 2-mL aliquot was fixed with 0.4 mL formic acid. Two 10-g silage samples from each silo were diluted in 20 mL deionized water or 17% formic acid solution (alternative methods). Aliquots obtained by the three methods were used to determine the silage contents of fermentation end-products. The accuracy of the alternative methods was evaluated by comparing mean bias of estimates obtained by manual screw-press and by alternative methods, whereas precision was assessed by the root mean square prediction error and the residual error. Robustness was determined by studying the interaction between bias and chemical components, pH, in vitro dry matter digestibility (IVDMD) and buffer capacity. The 17% formic acid method was more accurate for estimating acetic, butyric and lactic acids, although it resulted in low overestimates of propionic acid and underestimates of ethanol. The deionized water method overestimated acetic and propionic acids and slightly underestimated ethanol. The 17% formic acid method was more precise than deionized water for estimating all organic acids and ethanol. The robustness of each method with respect to variation in the silage chemical composition, IVDMD and pH is dependent on the fermentation end-product at evaluation. The robustness of the alternative methods seems to be critical at the determination of lactic acid and ethanol contents. MenosThe objective of this study was to evaluate accuracy, precision and robustness of two methods to obtain silage samples, in comparison with extraction of liquor by manual screw-press. Wet brewery residue alone or combined with soybean hulls and citrus pulp were ensiled in laboratory silos. Liquor was extracted by a manual screw-press and a 2-mL aliquot was fixed with 0.4 mL formic acid. Two 10-g silage samples from each silo were diluted in 20 mL deionized water or 17% formic acid solution (alternative methods). Aliquots obtained by the three methods were used to determine the silage contents of fermentation end-products. The accuracy of the alternative methods was evaluated by comparing mean bias of estimates obtained by manual screw-press and by alternative methods, whereas precision was assessed by the root mean square prediction error and the residual error. Robustness was determined by studying the interaction between bias and chemical components, pH, in vitro dry matter digestibility (IVDMD) and buffer capacity. The 17% formic acid method was more accurate for estimating acetic, butyric and lactic acids, although it resulted in low overestimates of propionic acid and underestimates of ethanol. The deionized water method overestimated acetic and propionic acids and slightly underestimated ethanol. The 17% formic acid method was more precise than deionized water for estimating all organic acids and ethanol. The robustness of each method with respect to variation in the si... Mostrar Tudo |
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Thesagro: |
Silagem. |
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Categoria do assunto: |
-- |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/78416/1/0000007017-Gomes-et-al-2012-RBZ.pdf
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Marc: |
LEADER 02292naa a2200181 a 4500
001 1952505
005 2013-03-07
008 2012 bl uuuu u00u1 u #d
100 1 $aGOMES, R. da C.
245 $aAccuracy, precision and robustness of different methods to obtain samples from silages in fermentation studies.$h[electronic resource]
260 $c2012
520 $aThe objective of this study was to evaluate accuracy, precision and robustness of two methods to obtain silage samples, in comparison with extraction of liquor by manual screw-press. Wet brewery residue alone or combined with soybean hulls and citrus pulp were ensiled in laboratory silos. Liquor was extracted by a manual screw-press and a 2-mL aliquot was fixed with 0.4 mL formic acid. Two 10-g silage samples from each silo were diluted in 20 mL deionized water or 17% formic acid solution (alternative methods). Aliquots obtained by the three methods were used to determine the silage contents of fermentation end-products. The accuracy of the alternative methods was evaluated by comparing mean bias of estimates obtained by manual screw-press and by alternative methods, whereas precision was assessed by the root mean square prediction error and the residual error. Robustness was determined by studying the interaction between bias and chemical components, pH, in vitro dry matter digestibility (IVDMD) and buffer capacity. The 17% formic acid method was more accurate for estimating acetic, butyric and lactic acids, although it resulted in low overestimates of propionic acid and underestimates of ethanol. The deionized water method overestimated acetic and propionic acids and slightly underestimated ethanol. The 17% formic acid method was more precise than deionized water for estimating all organic acids and ethanol. The robustness of each method with respect to variation in the silage chemical composition, IVDMD and pH is dependent on the fermentation end-product at evaluation. The robustness of the alternative methods seems to be critical at the determination of lactic acid and ethanol contents.
650 $aSilagem
700 1 $aMEYER, P. M.
700 1 $aCASTRO, A. L. de
700 1 $aNETTO, A. S.
700 1 $aRODRIGUES, P. H. M.
773 $tRevista Brasileira de Zootecnia$gv.41, n.6, p.1369-1377, 2012.
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Embrapa Gado de Corte (CNPGC) |
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