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| 2. |  | CASTRO, L. A. S. de; THÜRMER, L. Potencial produtivo de cinquenta acessos genéticos de batata-doce do banco ativo de germoplasma da Embrapa Clima Temperado na safra 2009/2010. In: SIMPÓSIO ESTADUAL DE AGROENERGIA, 3.; REUNIÃO TÉCNICA ANUAL DE AGROENERGIA, 3.; REUNIÃO TÉCNICA DA MANDIOCA, 10.; REUNIÃO TÉCNICA DA BATATA-DOCE, 2., Pelotas, 2010. Anais... Pelotas: Embrapa Clima Temperado, 2010. Organizado por Sérgio Delmar dos Anjos e Silva, Ivan Rodrigues de Almeida e Ana Cláudia Barneche de Oliveira. 1 CD-ROM.| Biblioteca(s): Embrapa Clima Temperado. |
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| 3. | | FRAGA, D. S.; AGOSTINETTO, D.; VARGAS, L.; NOHATTO, M. A.; THÜRMER, L.; HOLZ, M. T. Adaptive value of ryegrass biotypes with low-level resistance and susceptible to the herbicide fluazifop and competitive ability with the wheat culture. Planta Daninha, Viçosa, MG, v. 31, n. 4, p. 875-885, out./dez. 2013.| Biblioteca(s): Embrapa Trigo. |
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Registro Completo
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Biblioteca(s): |
Embrapa Gado de Leite. |
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Data corrente: |
20/04/2015 |
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Data da última atualização: |
12/08/2022 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
A - 2 |
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Autoria: |
RIBEIRO JÚNIOR, G. de O.; VELASCO, F. O.; FARIA JÚNIOR, W. G. de; TEIXEIRA, A. de M.; MACHADO, F. S.; MAGALHÃES, F. A.; JAYME, D. G.; GONÇALVES, L. C. |
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Afiliação: |
G. DE O. RIBEIRO JÚNIOR, UFMG; F. O. VELASCO, UFMG; W. G. DE FARIA JÚNIOR, UFRR; A. DE M. TEIXEIRA, UFU; FERNANDA SAMARINI MACHADO, CNPGL; F. A. MAGALHÃES, UFMG; D. G. JAYME, UFMG; L. C. GONÇALVES, UFMG. |
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Título: |
In situ degradation kinetic of Andropogon gayanus grass silages harvested at three stages of maturity. |
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Ano de publicação: |
2014 |
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Fonte/Imprenta: |
Arquivo Brasileiro de Medicina Veterinária e Zootecnia, v. 66, n. 6, p. 1883-1890, 2014. |
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DOI: |
https://doi.org/10.1590/1678-6780 |
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Idioma: |
Inglês |
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Conteúdo: |
ABSTRACT - Maturity is considered the primary factor affecting the nutritive value of forages. The aim of this study was to evaluate and compare dry matter (DM), crude protein (CP) and neutral detergent fiber (NDF) ruminal degradation kinetics of Andropogon gayanus grass silages harvested at three stages of maturity (56, 84 and 112 d). Dried and ground silage samples (5 mm) were incubated in nylon bags inside the rumen for 0, 6, 12, 24, 48, 72 and 96 h to estimate the kinetics of ruminal DM, CP and NDF degradation. The ruminal kinetic parameters of the silages from each treatment (56, 84 and 112 d of regrowth) in each animal (5 cows) were determined by the model: y = a + b(1 ? e?c(t?L)). The parameters generated by the model were analyzed as randomized block design, with grass regrowth age as the fixed effect and animal the as random effect (blocks). The grass silage ensiled with 56 days of regrowth had the highest (P<0.05) effective degradability of DM and NDF calculated for fractional rate of particulate passage of 2%/h. All silages had low CP soluble fraction (<25.4%) and effective degradability calculated for fractional rate of particulate passage of 2%/h (<40.1%). A greater (P<0.05) NDF lag time was observed for the silages ensiled with 84 and 112d compared to the silage produced with 56d of regrowth. The ruminal degradation kinetics of Andropogon gayanus grass silages showed that the grass ensiled with 56 days of regrowth had higher nutritional value. RESUMO - Maturity is considered the primary factor affecting the nutritive value of forages. The aim of this study was to evaluate and compare dry matter (DM), crude protein (CP) and neutral detergent fiber (NDF) ruminal degradation kinetics of Andropogon gayanus grass silages harvested at three stages of maturity (56, 84 and 112 d). Dried and ground silage samples (5 mm) were incubated in nylon bags inside the rumen for 0, 6, 12, 24, 48, 72 and 96 h to estimate the kinetics of ruminal DM, CP and NDF degradation. The ruminal kinetic parameters of the silages from each treatment (56, 84 and 112 d of regrowth) in each animal (5 cows) were determined by the model: y = a + b(1 ? e?c(t?L)). The parameters generated by the model were analyzed as randomized block design, with grass regrowth age as the fixed effect and animal the as random effect (blocks). The grass silage ensiled with 56 days of regrowth had the highest (P<0.05) effective degradability of DM and NDF calculated for fractional rate of particulate passage of 2%/h. All silages had low CP soluble fraction (<25.4%) and effective degradability calculated for fractional rate of particulate passage of 2%/h (<40.1%). A greater (P<0.05) NDF lag time was observed for the silages ensiled with 84 and 112d compared to the silage produced with 56d of regrowth. The ruminal degradation kinetics of Andropogon gayanus grass silages showed that the grass ensiled with 56 days of regrowth had higher nutritional value. MenosABSTRACT - Maturity is considered the primary factor affecting the nutritive value of forages. The aim of this study was to evaluate and compare dry matter (DM), crude protein (CP) and neutral detergent fiber (NDF) ruminal degradation kinetics of Andropogon gayanus grass silages harvested at three stages of maturity (56, 84 and 112 d). Dried and ground silage samples (5 mm) were incubated in nylon bags inside the rumen for 0, 6, 12, 24, 48, 72 and 96 h to estimate the kinetics of ruminal DM, CP and NDF degradation. The ruminal kinetic parameters of the silages from each treatment (56, 84 and 112 d of regrowth) in each animal (5 cows) were determined by the model: y = a + b(1 ? e?c(t?L)). The parameters generated by the model were analyzed as randomized block design, with grass regrowth age as the fixed effect and animal the as random effect (blocks). The grass silage ensiled with 56 days of regrowth had the highest (P<0.05) effective degradability of DM and NDF calculated for fractional rate of particulate passage of 2%/h. All silages had low CP soluble fraction (<25.4%) and effective degradability calculated for fractional rate of particulate passage of 2%/h (<40.1%). A greater (P<0.05) NDF lag time was observed for the silages ensiled with 84 and 112d compared to the silage produced with 56d of regrowth. The ruminal degradation kinetics of Andropogon gayanus grass silages showed that the grass ensiled with 56 days of regrowth had higher nutritional value. RESUMO - Maturity... Mostrar Tudo |
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Palavras-Chave: |
Gamba grass; Maturity; Preserved forage; Ruminal degradability; Tropical grass. |
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Categoria do assunto: |
F Plantas e Produtos de Origem Vegetal |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/122515/1/Cnpgl-2014-ArqBrasMedVetZ-In-situ.pdf
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Marc: |
LEADER 03871naa a2200277 a 4500
001 2013820
005 2022-08-12
008 2014 bl uuuu u00u1 u #d
024 7 $ahttps://doi.org/10.1590/1678-6780$2DOI
100 1 $aRIBEIRO JÚNIOR, G. de O.
245 $aIn situ degradation kinetic of Andropogon gayanus grass silages harvested at three stages of maturity.$h[electronic resource]
260 $c2014
520 $aABSTRACT - Maturity is considered the primary factor affecting the nutritive value of forages. The aim of this study was to evaluate and compare dry matter (DM), crude protein (CP) and neutral detergent fiber (NDF) ruminal degradation kinetics of Andropogon gayanus grass silages harvested at three stages of maturity (56, 84 and 112 d). Dried and ground silage samples (5 mm) were incubated in nylon bags inside the rumen for 0, 6, 12, 24, 48, 72 and 96 h to estimate the kinetics of ruminal DM, CP and NDF degradation. The ruminal kinetic parameters of the silages from each treatment (56, 84 and 112 d of regrowth) in each animal (5 cows) were determined by the model: y = a + b(1 ? e?c(t?L)). The parameters generated by the model were analyzed as randomized block design, with grass regrowth age as the fixed effect and animal the as random effect (blocks). The grass silage ensiled with 56 days of regrowth had the highest (P<0.05) effective degradability of DM and NDF calculated for fractional rate of particulate passage of 2%/h. All silages had low CP soluble fraction (<25.4%) and effective degradability calculated for fractional rate of particulate passage of 2%/h (<40.1%). A greater (P<0.05) NDF lag time was observed for the silages ensiled with 84 and 112d compared to the silage produced with 56d of regrowth. The ruminal degradation kinetics of Andropogon gayanus grass silages showed that the grass ensiled with 56 days of regrowth had higher nutritional value. RESUMO - Maturity is considered the primary factor affecting the nutritive value of forages. The aim of this study was to evaluate and compare dry matter (DM), crude protein (CP) and neutral detergent fiber (NDF) ruminal degradation kinetics of Andropogon gayanus grass silages harvested at three stages of maturity (56, 84 and 112 d). Dried and ground silage samples (5 mm) were incubated in nylon bags inside the rumen for 0, 6, 12, 24, 48, 72 and 96 h to estimate the kinetics of ruminal DM, CP and NDF degradation. The ruminal kinetic parameters of the silages from each treatment (56, 84 and 112 d of regrowth) in each animal (5 cows) were determined by the model: y = a + b(1 ? e?c(t?L)). The parameters generated by the model were analyzed as randomized block design, with grass regrowth age as the fixed effect and animal the as random effect (blocks). The grass silage ensiled with 56 days of regrowth had the highest (P<0.05) effective degradability of DM and NDF calculated for fractional rate of particulate passage of 2%/h. All silages had low CP soluble fraction (<25.4%) and effective degradability calculated for fractional rate of particulate passage of 2%/h (<40.1%). A greater (P<0.05) NDF lag time was observed for the silages ensiled with 84 and 112d compared to the silage produced with 56d of regrowth. The ruminal degradation kinetics of Andropogon gayanus grass silages showed that the grass ensiled with 56 days of regrowth had higher nutritional value.
653 $aGamba grass
653 $aMaturity
653 $aPreserved forage
653 $aRuminal degradability
653 $aTropical grass
700 1 $aVELASCO, F. O.
700 1 $aFARIA JÚNIOR, W. G. de
700 1 $aTEIXEIRA, A. de M.
700 1 $aMACHADO, F. S.
700 1 $aMAGALHÃES, F. A.
700 1 $aJAYME, D. G.
700 1 $aGONÇALVES, L. C.
773 $tArquivo Brasileiro de Medicina Veterinária e Zootecnia$gv. 66, n. 6, p. 1883-1890, 2014.
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Embrapa Gado de Leite (CNPGL) |
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