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Registro Completo |
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Biblioteca(s): |
Embrapa Soja. |
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Data corrente: |
28/09/2010 |
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Data da última atualização: |
25/10/2012 |
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Tipo da produção científica: |
Artigo em Anais de Congresso |
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Autoria: |
KASCHUK, G.; ALBERTON, O.; HUNGRIA, M. |
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Afiliação: |
GLACIELA KASCHUK, UNIPAR, Umuarama.; ODAIR ALBERTON, UNIPAR, Umuarama.; MARIANGELA HUNGRIA DA CUNHA, CNPSO. |
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Título: |
Três décadas de estudos sobre biomassa microbiana nos ecossistemas brasileiros: lições aprendidas sobre qualidade do solo e indicadores de sustentabilidade. |
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Ano de publicação: |
2010 |
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Fonte/Imprenta: |
In: REUNIÃO BRASILEIRA DE FERTILIDADE DO SOLO E NUTRIÇÃO DE PLANTAS, 29.; REUNIÃO BRASILEIRA SOBRE MICORRIZAS, 13.; SIMPÓSIO BRASILEIRO DE MICROBIOLOGIA DO SOLO, 11.; REUNIÃO BRASILEIRA DE BIOLOGIA DO SOLO, 8., 2010, Guarapari. Fontes de nutrientes e produção agrícola: modelando o futuro: anais. Viçosa: SBCS, 2010. 4 p. Trab. 1501. 1 CD-ROM. FERTBIO 2010. |
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Idioma: |
Português |
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Conteúdo: |
Desde a publicação do método de determinação do carbono da biomassa microbiana (CBM), foram realizados dezenas de estudos no Brasil sobre os efeitos dos diferentes usos do solo sobre o CBM e parâmetros relacionados. Nesse trabalho, tais estudos foram compilados com o objetivo de identificar as melhores estratégias para assegurar a sustentabilidade do uso do solo. Foram avaliadas as práticas de plantio direto (PD) e convencional (PC), rotações de culturas, pastagens, agricultura orgânica, queimadas, e aplicação de resíduos industriais e agroquímicos. Os efeitos do PD sobre o PC para aumentar o CBM e reduzir o qCO2 (quociente metabólico: respiração basal/CBM) foram confirmados por uma meta-análise abrangendo 233 observações experimentais. A agricultura orgânica, a rotação de culturas e a diminuição da aplicação de agroquímicos promoveram o CBM e o quociente microbiano (CBM/C orgânico total). As pastagens degradadas resultaram em diminuição do CBM, mas as pastagens rotacionadas com culturas anuais foram favoráveis à microbiota do solo. Não foram constatadas tendências claras para a resposta do CBM à aplicação de resíduos industriais. Constatouse que a avaliação do CBM é uma metodologia sólida para a avaliação da qualidade do solo no Brasil. Contudo, as relações entre o CBM, a ciclagem de nutrientes, a diversidade e a funcionalidade microbiana do solo ainda não são completamente entendidas. |
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Thesagro: |
Microbiologia do solo. |
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Thesaurus Nal: |
Soil biology. |
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Categoria do assunto: |
P Recursos Naturais, Ciências Ambientais e da Terra |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/33918/1/id31286.pdf
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Marc: |
LEADER 02317nam a2200157 a 4500
001 1863090
005 2012-10-25
008 2010 bl uuuu u00u1 u #d
100 1 $aKASCHUK, G.
245 $aTrês décadas de estudos sobre biomassa microbiana nos ecossistemas brasileiros$blições aprendidas sobre qualidade do solo e indicadores de sustentabilidade.
260 $aIn: REUNIÃO BRASILEIRA DE FERTILIDADE DO SOLO E NUTRIÇÃO DE PLANTAS, 29.; REUNIÃO BRASILEIRA SOBRE MICORRIZAS, 13.; SIMPÓSIO BRASILEIRO DE MICROBIOLOGIA DO SOLO, 11.; REUNIÃO BRASILEIRA DE BIOLOGIA DO SOLO, 8., 2010, Guarapari. Fontes de nutrientes e produção agrícola: modelando o futuro: anais. Viçosa: SBCS, 2010. 4 p. Trab. 1501. 1 CD-ROM. FERTBIO 2010.$c2010
520 $aDesde a publicação do método de determinação do carbono da biomassa microbiana (CBM), foram realizados dezenas de estudos no Brasil sobre os efeitos dos diferentes usos do solo sobre o CBM e parâmetros relacionados. Nesse trabalho, tais estudos foram compilados com o objetivo de identificar as melhores estratégias para assegurar a sustentabilidade do uso do solo. Foram avaliadas as práticas de plantio direto (PD) e convencional (PC), rotações de culturas, pastagens, agricultura orgânica, queimadas, e aplicação de resíduos industriais e agroquímicos. Os efeitos do PD sobre o PC para aumentar o CBM e reduzir o qCO2 (quociente metabólico: respiração basal/CBM) foram confirmados por uma meta-análise abrangendo 233 observações experimentais. A agricultura orgânica, a rotação de culturas e a diminuição da aplicação de agroquímicos promoveram o CBM e o quociente microbiano (CBM/C orgânico total). As pastagens degradadas resultaram em diminuição do CBM, mas as pastagens rotacionadas com culturas anuais foram favoráveis à microbiota do solo. Não foram constatadas tendências claras para a resposta do CBM à aplicação de resíduos industriais. Constatouse que a avaliação do CBM é uma metodologia sólida para a avaliação da qualidade do solo no Brasil. Contudo, as relações entre o CBM, a ciclagem de nutrientes, a diversidade e a funcionalidade microbiana do solo ainda não são completamente entendidas.
650 $aSoil biology
650 $aMicrobiologia do solo
700 1 $aALBERTON, O.
700 1 $aHUNGRIA, M.
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Registro original: |
Embrapa Soja (CNPSO) |
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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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