| |
|
|
|
Registro Completo |
|
Biblioteca(s): |
Embrapa Meio-Norte. |
|
Data corrente: |
19/11/1997 |
|
Data da última atualização: |
04/01/2019 |
|
Autoria: |
COELHO, E. F.; OR, D. |
|
Afiliação: |
EMBRAPA-CPAMN. |
|
Título: |
Applicability of analytica solutions for flow from point sources to drip irrigation management. |
|
Ano de publicação: |
1997 |
|
Fonte/Imprenta: |
Soil Science Society of America Journal, v. 61, n. 5, p. 1331-1341, 1997. |
|
Idioma: |
Inglês |
|
Conteúdo: |
The design and management of drip irrigation systems requires understanding of water distribution and dynamics within the wetted soil volume. The information can be obtained by means of analytical or numerical solutions of the multidimensional Richards equation. Though steady-state sulutions have bean advocated as design tools for drip irrigation, very little information about their performance under practical field conditions is available. The objective of this study was to evaluate the applicability of analytical solutions for steady and transient flows from point sources to practical drip irrigation management. The emphasis was the adaptive and dynamic aspects of managemente vs. conservative disegn considerations. Experiments were carried out in containers and in the field to determine steady-state attainment rates and to provide information on spatial and temporal dynamics of water content and matric potential during irrigationcycles. The main results were:(i) analytical solutions for steady and transient flow conditions predicted reasonably well measured distributions of water content and matric potential in the absence of plants; (ii) steady flow conditions were seldom realized under practical drip irrigation; (iii) transient flow solutions provided a more realistic description of soil water dynamics; and (iv) introducing uptake termsinto transient analytical solutions provided a simple and effective framework for capturing soil water dynamics in the presence of plant roots. MenosThe design and management of drip irrigation systems requires understanding of water distribution and dynamics within the wetted soil volume. The information can be obtained by means of analytical or numerical solutions of the multidimensional Richards equation. Though steady-state sulutions have bean advocated as design tools for drip irrigation, very little information about their performance under practical field conditions is available. The objective of this study was to evaluate the applicability of analytical solutions for steady and transient flows from point sources to practical drip irrigation management. The emphasis was the adaptive and dynamic aspects of managemente vs. conservative disegn considerations. Experiments were carried out in containers and in the field to determine steady-state attainment rates and to provide information on spatial and temporal dynamics of water content and matric potential during irrigationcycles. The main results were:(i) analytical solutions for steady and transient flow conditions predicted reasonably well measured distributions of water content and matric potential in the absence of plants; (ii) steady flow conditions were seldom realized under practical drip irrigation; (iii) transient flow solutions provided a more realistic description of soil water dynamics; and (iv) introducing uptake termsinto transient analytical solutions provided a simple and effective framework for capturing soil water dynamics in the presence of plant... Mostrar Tudo |
|
Palavras-Chave: |
Analytical solution; Drip irrigation; Gotejamento; Point source; Ponto forte; Solucao analitica. |
|
Thesagro: |
Irrigação. |
|
Thesaurus Nal: |
irrigation. |
|
Categoria do assunto: |
-- |
|
Marc: |
LEADER 02163naa a2200229 a 4500
001 1050690
005 2019-01-04
008 1997 bl uuuu u00u1 u #d
100 1 $aCOELHO, E. F.
245 $aApplicability of analytica solutions for flow from point sources to drip irrigation management.
260 $c1997
520 $aThe design and management of drip irrigation systems requires understanding of water distribution and dynamics within the wetted soil volume. The information can be obtained by means of analytical or numerical solutions of the multidimensional Richards equation. Though steady-state sulutions have bean advocated as design tools for drip irrigation, very little information about their performance under practical field conditions is available. The objective of this study was to evaluate the applicability of analytical solutions for steady and transient flows from point sources to practical drip irrigation management. The emphasis was the adaptive and dynamic aspects of managemente vs. conservative disegn considerations. Experiments were carried out in containers and in the field to determine steady-state attainment rates and to provide information on spatial and temporal dynamics of water content and matric potential during irrigationcycles. The main results were:(i) analytical solutions for steady and transient flow conditions predicted reasonably well measured distributions of water content and matric potential in the absence of plants; (ii) steady flow conditions were seldom realized under practical drip irrigation; (iii) transient flow solutions provided a more realistic description of soil water dynamics; and (iv) introducing uptake termsinto transient analytical solutions provided a simple and effective framework for capturing soil water dynamics in the presence of plant roots.
650 $airrigation
650 $aIrrigação
653 $aAnalytical solution
653 $aDrip irrigation
653 $aGotejamento
653 $aPoint source
653 $aPonto forte
653 $aSolucao analitica
700 1 $aOR, D.
773 $tSoil Science Society of America Journal$gv. 61, n. 5, p. 1331-1341, 1997.
Download
Esconder MarcMostrar Marc Completo |
|
Registro original: |
Embrapa Meio-Norte (CPAMN) |
|
|
Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
URL |
Voltar
|
|
|
| Registros recuperados : 68 | |
| 61. |  | SILVA JÚNIOR, E. C. da; GUILHERME, L. R. G.; LOPES, G.; SOUZA, G. A. de; SILVA, K. E. da; LIMA, R. M. B. de; GUEDES, M. C.; WADT, L. H. de O.; REIS, A. R. dos. Are all Brazil nuts selenium-rich? In: INTERNATIONAL CONFERENCE ON SELENIUM IN THE ENVIRONMENT AND HUMAN HEALTH, 4., 2015, São Paulo. Global advances in selenium research from theory to application: proceedings. Londres: Taylor & Francis Group, 2016. p. 133-134. Editores: Gary S. Banuelos, Zhi-Qing Lin, Milton Ferreira Moraes, Luiz Roberto Guimarães Guilherme, Andre Rodrigues dos Reis.| Tipo: Capítulo em Livro Técnico-Científico |
| Biblioteca(s): Embrapa Amapá; Embrapa Rondônia. |
|    |
| 62. | | SILVA JÚNIOR, E. C. da; GUILHERME, L. R. G.; LOPES, G.; SOUZA, G. A. de; SILVA, K. E. da; LIMA, R. M. B. de; GUEDES, M. C.; WADT, L. H. de O.; REIS, A. R. dos. Are all Brazil nuts selenium-rich? In: INTERNATIONAL CONFERENCE ON SELENIUM IN THE ENVIRONMENT AND HUMAN HEALTH, 4., 2015, São Paulo. Global advances in selenium research from theory to application: Proceedings....Londres: Taylor & Francis Group, 2016. p. 133-134. Editores Gary S. Banuelos, Zhi-Qing Lin, Milton Ferreira Moraes, Luiz Roberto Guimarães Guilherme, Andre Rodrigues dos Reis.| Tipo: Artigo em Anais de Congresso |
| Biblioteca(s): Embrapa Amazônia Ocidental. |
|  |
| 63. | | SILVA JUNIOR, E. C.; WADT, L. H. de O.; SILVA, K. E. da; LIMA, R. M. B.; BATISTA, K. D.; GUEDES, M. C.; CARVALHO, G. S.; CARVALHO, T. S.; REIS, A. R.; LOPES, G.; GUILHERME, L. R. G. Natural variation of selenium in Brazil nuts and soils from the Amazon region. Chemosphere, v. 188, p. 650-658, 2017.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: A - 1 |
| Biblioteca(s): Embrapa Amapá; Embrapa Amazônia Ocidental; Embrapa Rondônia; Embrapa Roraima. |
| |
| 64. | | CARVALHO, C. DE A.; CORGUINHA, A. P. B.; SOUZA, G. A. DE; PEREIRA, F. G.; FAGUNDES, T. G.; VIEIRA, E. A.; FIALHO, J. de F.; GUILHERME, L. R. G. Teor de ferro e zinco em raízes de clones de mandioca rosada visando programas de biofortificação. In: REUNIÃO BRASILEIRA DE FERTILIDADE DO SOLO E NUTRIÇÃO DE PLANTAS, 30.; REUNIÃO BRASILEIRA SOBRE MICORRIZAS, 14.; SIMPÓSIO BRASILEIRO DE MICROBIOLOGIA DO SOLO, 12.; REUNIÃO BRASILEIRA DE BIOLOGIA DO SOLO, 9.; SIMPÓSIO SOBRE SELÊNIO NO BRASIL, 1., 2012, Maceió. A responsabilidade socioambiental da pesquisa agrícola: anais. Viçosa, MG: Sociedade Brasileira de Ciência do Solo, 2012.| Tipo: Artigo em Anais de Congresso |
| Biblioteca(s): Embrapa Cerrados. |
| |
| 65. | | SILVA JÚNIOR, E. C. da; WADT, L. H. de O.; SILVA, K. E. da; LIMA, R. M. B. de; BATISTA, K. D.; GUEDES, M. C.; OLIVEIRA JUNIOR, R. C. de; REIS, A. R. dos; LOPES, G.; BROADLEY, M. R.; YOUNG, S. D.; GUILHERME, L. R. G. Geochemistry of selenium, barium, and iodine in representative soils of the Brazilian Amazon rainforest. Science of The Total Environment, v. 828, 154426, July 2022.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: A - 1 |
| Biblioteca(s): Embrapa Amazônia Ocidental; Embrapa Amazônia Oriental; Embrapa Rondônia; Embrapa Roraima. |
| |
| 66. | | SILVA JÚNIOR, E. C. da; MARTINS, G. C.; WADT, L. H. de O.; SILVA, K. E. da; LIMA, R. M. B. de; BATISTA, K. D.; GUEDES, M. C.; OLIVEIRA JUNIOR, R. C. de; REIS, A. R.; LOPES, G.; MENEZES, M. D. de; BROADLEY, M. R.; YOUNG, S. D.; GUILHERME, L. R. G. Natural variation of arsenic fractions in soils of the Brazilian Amazon. Science of the Total Environment,v. 687, p. 1219-1231, 2019.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: A - 1 |
| Biblioteca(s): Embrapa Amapá; Embrapa Amazônia Ocidental; Embrapa Amazônia Oriental; Embrapa Rondônia; Embrapa Roraima. |
| |
| 67. | | WITHERS, P. J. A.; RODRIGUES, M.; SOLTANGHEISI, A.; CARVALHO, T. S. de; GUILHERME, L. R. G.; BENITES, V. de M.; GATIBONI, L. C.; SOUSA, D. M. G. de; NUNES, R. de S.; ROSOLEM, C. A.; ANDREOTE, F. D.; OLIVEIRA JUNIOR, A. de; COUTINHO, E. L. M.; PAVINATO, P. S. Transitions to sustainable management of phosphorus in Brazilian agriculture. Scientific Reports, v. 8, article 2537, 2018.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: A - 1 |
| Biblioteca(s): Embrapa Cerrados; Embrapa Soja; Embrapa Solos. |
| |
| 68. | | SILVA JUNIOR, E. C. da; DURAN, N. M.; LESSA, J. H. de L.; RIBEIRO, P. G.; WADT, L. H. de O.; SILVA, K. E. da; LIMA, R. M. B. de; BATISTA, K. D.; GUEDES, M. C.; OLIVEIRA JUNIOR, R. C. de; CARVALHO, H. W. P. de; REIS, A. R. dos; LOPES, G.; GUILHERME, L. R. G. Unraveling the accumulation and localization of selenium and barium in Brazil nuts using spectroanalytical techniques. Journal of Food Composition and Analysis, v. 106, art. 104329, March 2022.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: A - 1 |
| Biblioteca(s): Embrapa Amapá; Embrapa Amazônia Ocidental; Embrapa Amazônia Oriental; Embrapa Rondônia; Embrapa Roraima. |
| |
| Registros recuperados : 68 | |
|
| Nenhum registro encontrado para a expressão de busca informada. |
|
|
