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| Registros recuperados : 94 | |
| 61. |  | BERÇA, A. S.; CARDOSO, A. da S.; LONGHIGY, V. Z.; TEDESCHI, L. O.; BODDEY, R. M.; BERNDT, A.; REIS, R. A.; RUGGIERI, A. C. Methane production and nitrogen balance of dairy heifers grazing palisade grass cv. Marandu alone or with forage peanu Journal of Animal Science, v. 97, n. 11, , p. 4625-4634, nov. 2019.| Biblioteca(s): Embrapa Agrobiologia; Embrapa Pecuária Sudeste. |
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| 62. | | OLIVEIRA, R. V.; TEIXEIRA, I. A. M. de A.; SIQUEIRA, G. R.; RESENDE, K. T. de; REIS, R. A.; SILVA, V. C. e; OLIVEIRA, D. de. Consumo e desempenho de caprinos em confinamento recebendo rações contendo silagens de grãos úmidos de milho aditivadas. In: REUNIÃO ANUAL DA SOCIEDADE BRASILEIRA DE ZOOTECNIA, 45., 2008, Lavras. Biotecnologia e sustentabilidade: anais. Brasília, DF: SBZ; Lavras: UFLA, 2008. 1 CD-ROM.| Biblioteca(s): Embrapa Caprinos e Ovinos. |
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| 63. | | LONGHINI, V. Z.; CARDOSO, A. S.; BERÇA, A. S.; BODDEY, R. M.; REIS, R. A.; DUBEUX JR, J. C. B.; RUGGIERI, A. C. Could forage peanut in low proportion replace N fertilizer in livestock systems? PLoS ONE, v. 16, n. 3, e0247931, 2021.| Biblioteca(s): Embrapa Agrobiologia. |
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| 64. | | BERNARDES, T. F.; REIS, R. A.; AMARAL, R. C. do; SIQUEIRA, G. R.; ROTH, A. P. de T. P.; ROTH, M. de T. P.; SALMAN, A. K. D. Avaliação das silagens de plantas de milho e de sorgo inoculadas com Lactobacillus buchneri 40788 ou Lactobacillus plantarum. In: CONGRESSO DE FORRAGICULTURA E PASTAGENS, 2., 2007, Lavras, MG. [Anais...]. [Lavras, MG: UFLA/NEFOR], 2007. Parceria com autores.| Biblioteca(s): Embrapa Rondônia. |
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| 65. | | SOUZA, G. N. de; CARVALHO, G. L. O. DE; GREGO, C. R.; HOTT, M. C.; SILVA, M. R.; HYLARIO, S. M.; AMARAL, C. M.; REIS, R. A. Analise espacial dos indicadores de qualidade composicional do leite de rebanhos bovinos localizados nas bacias leiteiras de Jaru e Ji-Paraná, Rondonia, 2011. In: CONGRESSO INTERNACIONAL DO LEITE, 11.; WORKSHOP DE POLÍTICAS PÚBLICAS, 11.; SIMPÓSIO DE SUSTENTABILIDADE DA ATIVIDADE LEITEIRA, 12., 2012, Goiânia. Anais... Juiz de Fora: Embrapa Gado de Leite, 2012.| Biblioteca(s): Embrapa Gado de Leite. |
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| 66. | | SOUZA, G. N. de; CARVALHO, G. L. DE O.; GREGO, C. R.; HOTT, M. C.; SILVA, M. R.; HYLARIO, S. M.; AMARAL, C. M.; REIS, R. A. Analise espacial dos indicadores de qualidade higiênico-sanitária do leite de rebanhos bovinos localizados nas bacias leiteiras de Jaru e Ji-Paraná, Rondonia, 2011. In: CONGRESSO INTERNACIONAL DO LEITE, 11.; WORKSHOP DE POLÍTICAS PÚBLICAS, 11.; SIMPÓSIO DE SUSTENTABILIDADE DA ATIVIDADE LEITEIRA, 12., 2012, Goiânia. Anais... Juiz de Fora: Embrapa Gado de Leite, 2012.| Biblioteca(s): Embrapa Gado de Leite. |
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| 67. | | SOUZA, G. N. de; CARVALHO, G. L. O. DE; GREGO, C. R.; HOTT, M. C.; SILVA, M. R.; HYLARIO, S. M.; AMARAL, C. M.; REIS, R. A. Análise espacial dos indicadores de qualidade em Jaru e Ji-Paraná, Rondonia. Boletim CBLeite, v. 7, n. 17, p. 5-7, 2013.| Biblioteca(s): Embrapa Gado de Leite. |
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| 68. | | SILVEIRA, C. H.; LIMA, C. S. A. de; LETÍCIO, M. de M.; RUGGIERI, A. C.; SILVA SOBRINHO, A. G. da; REIS, R. A. Avaliação do comportamento ingestivo de ovinos em pasto de capim Tifton-85 sobressemeadura de três cultivares de aveia. In: REUNIÃO ANUAL DA SOCIEDADE BRASILEIRA DE ZOOTECNIA, 45., 2008, Lavras. Biotecnologia e sustentabilidade: anais. Brasília, DF: SBZ; Lavras: UFLA, 2008. 1 CD-ROM.| Biblioteca(s): Embrapa Caprinos e Ovinos. |
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| 70. | | MOREIRA, L. F. P. P.; FERRARI, A. C.; MORAES, T. B.; REIS, R. A.; PEREIRA, F. M. V.; COLNAGO, L. A. Prediction of beef color using time-domain nuclear magnetic resonance (TD-NMR) relaxometry data and multivariate analyses Magnetic Resonance in Chemistry, [S.l.], v. 54, p. 800-804, 2016.| Biblioteca(s): Embrapa Instrumentação. |
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| 71. | | BERÇA, A. S.; CARDOSO, A. da S.; LONGHINI, V. Z.; TEDESCHI, L. O.; BODDEY, R. M.; REIS, R. A.; RUGGIERI, A. C. Protein and carbohydrate fractions in warm-season pastures: effects of nitrogen management strategies. Agronomy, v. 11, n. 5, e847, 2021.| Biblioteca(s): Embrapa Agrobiologia. |
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| 72. | | SOUZA, G. N. de; OLIVEIRA, E. F. DE; BRITO, M. A. V. P. e; LANGE, C. C.; HYLARIO, S. M.; REIS, R. A.; SILVA, M. R. Estimativa da prevalência de Staphylococcus aureus e Streptococcus agalactiae nos rebanhos da Associação dos Criadores de Gado Holandês de Minas Gerais, Brasil, 2011/2012. In: CONGRESSO INTERNACIONAL DO LEITE, 11.; WORKSHOP DE POLÍTICAS PÚBLICAS, 11.; SIMPÓSIO DE SUSTENTABILIDADE DA ATIVIDADE LEITEIRA, 12., 2012, Goiânia. Anais... Juiz de Fora: Embrapa Gado de Leite, 2012.| Biblioteca(s): Embrapa Gado de Leite. |
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| 73. | | RAPOSO, E.; AZENHA, M. V.; PRADO, F.; OLIVEIRA, J. A. de; RUGGIERI, A. C.; REIS, R. A.; SILVA SOBRINHO, A. G. da. Estudo do capim Milheto (Pennisetum americanum (L.) Leeke) e Sorgo híbrido (Sorghum bicolor (L.) Moench x Sorghum sudanense (Piper) Stapf) sob pastejo rotativo com ovinos. In: REUNIÃO ANUAL DA SOCIEDADE BRASILEIRA DE ZOOTECNIA, 45., 2008, Lavras. Biotecnologia e sustentabilidade: anais. Brasília, DF: SBZ; Lavras: UFLA, 2008. 1 CD-ROM.| Biblioteca(s): Embrapa Caprinos e Ovinos. |
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| 74. | | BERÇA, A. S.; CARDOSO, A. da S.; LONGHINI, V. Z.; PIZZARRO, F. da C.; MAGNABOSCO, W. de M.; REIS, R. A.; BODDEY, R. M.; RUGGIERI, A. C. Forage yield and accumulation of fertilized Marandu grass, intercropped with forage peanut or not fertilized under rotational grazing. In: ASA, CSSA AND SSSA INTERNATIONAL ANNUAL MEETINGS, 2017, TAMPA, FL. Managing global resources for a secure future. Abstract... Tampa: Soil Science Society of America, 2017.| Biblioteca(s): Embrapa Agrobiologia. |
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| 75. | | SOUZA FILHO, A. P. da S.; RODRIGUES, L. R. de A.; RODRIGUES, T. de J. D.; REIS, R. A.; PUZOTTI, M. A. M. Influencias alelopáticas do assa-peixe, sobre três gramíneas forrageiras. In: CONGRESSO BRASILEIRO DE FISIOLOGIA VEGETAL, 5., 1995, Lavras. Resumos. Lavras: SBFV, 1995. p. 319.| Biblioteca(s): Embrapa Amazônia Oriental. |
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| 76. | | BERNARDES, T. F.; REIS, R. A.; SCHOCKEN-ITURRINO, R. P.; CORRÊA, L. de C.; MOREIRA, A. L.; SILVEIRA, R. N. da. Perfil fermentativo e microbiológico do capim-marandu (Brachiaria brizantha cv. Marandu) ensilado com polpa cítrica peletizada. In: REUNIÃO ANUAL DA SOCIEDADE BRASILEIRA DE ZOOTECNIA, 40., 2003, Santa Maria, RS. Anais... Santa Maria: SBZ, 2003. 5 p. 1 CD-ROM.| Biblioteca(s): Embrapa Pecuária Sudeste. |
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| 77. | | SAN VITO, E.; LAGE, J. F.; MESSANA, J. D.; DALLANTONIA, E. E.; FRIGHETTO, R. T. S.; REIS, R. A.; NETO, A. J.; BERCHIELLI, T. T. Performance and methane emissions of grazing Nellore bulls supplemented with crude glycerin. Journal of Animal Science, v. 94, n. 11, P. 4728-4737, 2016.| Biblioteca(s): Embrapa Meio Ambiente. |
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| 78. | | CARVALHO, I. P. C. de; FIORENTINI, G.; BERNDT, A.; CASTAGNINO, P. S.; MESSANA, J. D.; FRIGHETTO, R. T. S.; REIS, R. A.; BERCHIELLI, T. T. Performance and methane emissions of Nellore steers grazing tropical pasture supplemented with lipid sources. Revista Brasileira de Zootecnia, Viçosa, v. 45, n. 12, p. 760-767, 2016.| Biblioteca(s): Embrapa Meio Ambiente; Embrapa Pecuária Sudeste. |
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| 79. | | GODOY, R.; PRIMAVESI, A. C.; BATISTA, L. A. R.; CESAR, F. C.; REIS, R. A.; HERLING, V. R.; YAMANAKA, R. N.; DANTAS, R.; SILVA, J. R. da. Recomendações de cultivares de aveia para o Estado de São Paulo. São Carlos, SP: Embrapa Pecuária Sudeste, 1998. 9 p. (Embrapa Pecuária Sudeste. Comunicado técnico, 19)| Biblioteca(s): Embrapa Pecuária Sudeste. |
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| 80. | | SIMILI, F. F.; GOMIDE, C. A. de M.; MOREIRA, A. L.; REIS, R. A.; LIMA, M. L. P.; PAZ, C. C. P. de. Respostas do híbrido de sorgo sudão às adubações nitrogenada e potássica: características estruturais e produtivas. Ciência e Agrotecnologia, v. 34, n. 1, p. 87-94, 2010.| Biblioteca(s): Embrapa Gado de Leite. |
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| Registros recuperados : 94 | |
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 | Acesso ao texto completo restrito à biblioteca da Embrapa Trigo. Para informações adicionais entre em contato com cnpt.biblioteca@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Trigo. |
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Data corrente: |
29/05/1992 |
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Data da última atualização: |
02/11/2019 |
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Autoria: |
WIETHÖLTER, S. |
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Título: |
Predicting potassium uptake by corn in the field using the strontium nitrate soil testing method and a diffusion-controlled uptake model. |
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Ano de publicação: |
1983 |
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Fonte/Imprenta: |
Madison: University of Wisconsin, 1983. |
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Páginas: |
244 p. |
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Idioma: |
Inglês |
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Notas: |
Thesis PhD. |
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Conteúdo: |
The rate of potassium uptake by plants grown in soil is limited by the rate of diffusion to the roots. Calculation of diffusion rates requires a knowledge of the soil solution concentration (C[indice]1i), buffer power (b) and diffusion coefficiente (D). The Gapon equation was used to calculate selectivity coefficients for K+, Na+, Ca2+, Mg2+, Mn2+ and Al3+ from concentrations in 0.004M Sr(NO3)2 extracts and from amounts exchangeable in M NH4Cl. For a proposed routine method, C[indice]1i, b and D were calculated from the Sr(NO3)2 equilibration. This required the use of estimated selectivity coefficients obtained from regression of pH, OM, clay and cation ratios on determined selectivity coefficients. A constant-root-absorbing-power (constant-[alfa]) diffusion equation was applied to a root model that assumed an effective radius (a[indice]e) of 0.07 cm (root radius + root-radius + root-hair length). A root length:plant dry matter ratio of 1000 cm g[elevado a]-1 dry matter was used, and each root segment was assumed to effective in K+ uptake for the same time period. Initially, uptake was assumed to occur only within the root-hair cylinder, the time of effective depletion being estimated with a steady- state, interacting-root model. After depletion of the root-hair cylinder, diffusion from outside was assumed to start, with radius equal to a[indice]e and [alfa] estimated from the Michaelis-Menten equation. Root hairs had to be effective for 4-5 days to satisfy the total K+ uptake estimated from K+ content of the ear leaf. Uptake of K+ by corn at 51 field sites throughout Wisconsin was best predicted by the diffusion model (r[elevado]2=0.58 with determined selectivity coefficients and 0.51 with estimated coefficients). The K+ concentration in Sr(NO3)2 also correlated well (r[elevado]2=0.49). Exchangeable K+ was a por predictor (r[elevado]2=0.13). The diffusion model applied to data from Sr(NO3)2 equilibration appears promising as a routine soil testing method for K+. With this approach, fertilizer recommendations could be based on on theoretically-derived estimates of K+ uptake rather than on empirically-derived relationships. MenosThe rate of potassium uptake by plants grown in soil is limited by the rate of diffusion to the roots. Calculation of diffusion rates requires a knowledge of the soil solution concentration (C[indice]1i), buffer power (b) and diffusion coefficiente (D). The Gapon equation was used to calculate selectivity coefficients for K+, Na+, Ca2+, Mg2+, Mn2+ and Al3+ from concentrations in 0.004M Sr(NO3)2 extracts and from amounts exchangeable in M NH4Cl. For a proposed routine method, C[indice]1i, b and D were calculated from the Sr(NO3)2 equilibration. This required the use of estimated selectivity coefficients obtained from regression of pH, OM, clay and cation ratios on determined selectivity coefficients. A constant-root-absorbing-power (constant-[alfa]) diffusion equation was applied to a root model that assumed an effective radius (a[indice]e) of 0.07 cm (root radius + root-radius + root-hair length). A root length:plant dry matter ratio of 1000 cm g[elevado a]-1 dry matter was used, and each root segment was assumed to effective in K+ uptake for the same time period. Initially, uptake was assumed to occur only within the root-hair cylinder, the time of effective depletion being estimated with a steady- state, interacting-root model. After depletion of the root-hair cylinder, diffusion from outside was assumed to start, with radius equal to a[indice]e and [alfa] estimated from the Michaelis-Menten equation. Root hairs had to be effective for 4-5 days to satisfy the total K+ upta... Mostrar Tudo |
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Palavras-Chave: |
Applied Statistics; Estatistica aplicada; Maize; Mathematical model; Modelos matematicos. |
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Thesagro: |
Absorção; Milho; Potássio; Solo; Zea Mays. |
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Thesaurus NAL: |
absorption; corn; potassium; soil. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02972nam a2200301 a 4500
001 1841891
005 2019-11-02
008 1983 bl uuuu m 00u1 u #d
100 1 $aWIETHÖLTER, S.
245 $aPredicting potassium uptake by corn in the field using the strontium nitrate soil testing method and a diffusion-controlled uptake model.
260 $aMadison: University of Wisconsin$c1983
300 $a244 p.
500 $aThesis PhD.
520 $aThe rate of potassium uptake by plants grown in soil is limited by the rate of diffusion to the roots. Calculation of diffusion rates requires a knowledge of the soil solution concentration (C[indice]1i), buffer power (b) and diffusion coefficiente (D). The Gapon equation was used to calculate selectivity coefficients for K+, Na+, Ca2+, Mg2+, Mn2+ and Al3+ from concentrations in 0.004M Sr(NO3)2 extracts and from amounts exchangeable in M NH4Cl. For a proposed routine method, C[indice]1i, b and D were calculated from the Sr(NO3)2 equilibration. This required the use of estimated selectivity coefficients obtained from regression of pH, OM, clay and cation ratios on determined selectivity coefficients. A constant-root-absorbing-power (constant-[alfa]) diffusion equation was applied to a root model that assumed an effective radius (a[indice]e) of 0.07 cm (root radius + root-radius + root-hair length). A root length:plant dry matter ratio of 1000 cm g[elevado a]-1 dry matter was used, and each root segment was assumed to effective in K+ uptake for the same time period. Initially, uptake was assumed to occur only within the root-hair cylinder, the time of effective depletion being estimated with a steady- state, interacting-root model. After depletion of the root-hair cylinder, diffusion from outside was assumed to start, with radius equal to a[indice]e and [alfa] estimated from the Michaelis-Menten equation. Root hairs had to be effective for 4-5 days to satisfy the total K+ uptake estimated from K+ content of the ear leaf. Uptake of K+ by corn at 51 field sites throughout Wisconsin was best predicted by the diffusion model (r[elevado]2=0.58 with determined selectivity coefficients and 0.51 with estimated coefficients). The K+ concentration in Sr(NO3)2 also correlated well (r[elevado]2=0.49). Exchangeable K+ was a por predictor (r[elevado]2=0.13). The diffusion model applied to data from Sr(NO3)2 equilibration appears promising as a routine soil testing method for K+. With this approach, fertilizer recommendations could be based on on theoretically-derived estimates of K+ uptake rather than on empirically-derived relationships.
650 $aabsorption
650 $acorn
650 $apotassium
650 $asoil
650 $aAbsorção
650 $aMilho
650 $aPotássio
650 $aSolo
650 $aZea Mays
653 $aApplied Statistics
653 $aEstatistica aplicada
653 $aMaize
653 $aMathematical model
653 $aModelos matematicos
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