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Registro Completo |
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Biblioteca(s): |
Embrapa Cerrados. |
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Data corrente: |
22/11/2000 |
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Data da última atualização: |
22/11/2000 |
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Autoria: |
LILIENFEIN, J.; WILCKE, W.; AYARZA, M. A.; LIMA, S. do C.; VILELA, L.; ZECH, W. |
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Título: |
Annual course of matric potential in differently used savanna oxisols in Brazil. |
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Ano de publicação: |
1999 |
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Fonte/Imprenta: |
Soil Society of American Journal, Madison, v.63, p.1778-1785, 1999. |
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Idioma: |
Inglês |
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Conteúdo: |
Sustainable land use in periodically dry Brasilian savannas requires a water-saving management. We hypothesized that the annual course of matric potentials (simbolo) in very-fine, isohyperthermic Anionic Acrustoxes of Pinus plantations (PI), degraded (DP) and productive pastures (PP) no-till (NT) and conventional tillage (CT) cropping, and natural savanna (Cerrado, CE) differed significantly. On three plots in each of these land-use systems water input and (simbolo) at the 0.15-, 0.30-, 0.80-, 1.2-, and 2.0-m depths was measured with tensiometers weekly between 27 Mar. 1997 and 28 Apr. 1998.Precipitation between 29 Apr. 1997 and 28 Apr.1998 was 1562 mm,with only 210 mm in May to September, when (simbolo) at the 0.15-and 0,30-m depths decreased to less than -80kPa in all systems; the lowest (simbolo) at 2-m depth was -57kPa. During the monitored period, the PI soils had lower average (simbolo) at the 0,8- to 2-m depths (-60 kPa) than those in CE (-46), indicating higher rainfall interception losses and higher transpiration. In CT, average (simbolo) values at the 0.8-to 2-m depths (-29) were higher than in NT (-51) because of different crops and different soil management. Between june and November, (simbolo) at the 2-m depth in CE decreased to a lower value (-42) than in vegetation-free CT (-22) and NT (-27). In DP and PP soils, (simbolo) were similar to those in CE soils at all depths. The estimated average water storage in the upper 2 m during the monitored period was 565 mm (CT) > 553 (PP) > 541 (DP) > 537 (CE) > 526 (NT) > 479 (PI).Our results show that mainly the vegetation type and tillage practices control the annual course of matric potencial in differently used savanna Oxisols. MenosSustainable land use in periodically dry Brasilian savannas requires a water-saving management. We hypothesized that the annual course of matric potentials (simbolo) in very-fine, isohyperthermic Anionic Acrustoxes of Pinus plantations (PI), degraded (DP) and productive pastures (PP) no-till (NT) and conventional tillage (CT) cropping, and natural savanna (Cerrado, CE) differed significantly. On three plots in each of these land-use systems water input and (simbolo) at the 0.15-, 0.30-, 0.80-, 1.2-, and 2.0-m depths was measured with tensiometers weekly between 27 Mar. 1997 and 28 Apr. 1998.Precipitation between 29 Apr. 1997 and 28 Apr.1998 was 1562 mm,with only 210 mm in May to September, when (simbolo) at the 0.15-and 0,30-m depths decreased to less than -80kPa in all systems; the lowest (simbolo) at 2-m depth was -57kPa. During the monitored period, the PI soils had lower average (simbolo) at the 0,8- to 2-m depths (-60 kPa) than those in CE (-46), indicating higher rainfall interception losses and higher transpiration. In CT, average (simbolo) values at the 0.8-to 2-m depths (-29) were higher than in NT (-51) because of different crops and different soil management. Between june and November, (simbolo) at the 2-m depth in CE decreased to a lower value (-42) than in vegetation-free CT (-22) and NT (-27). In DP and PP soils, (simbolo) were similar to those in CE soils at all depths. The estimated average water storage in the upper 2 m during the monitored period was 565 m... Mostrar Tudo |
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Palavras-Chave: |
Agua de solo. |
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Thesagro: |
Cerrado; Oxisol. |
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Thesaurus Nal: |
Ferralsols; soil water. |
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Categoria do assunto: |
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Marc: |
LEADER 02366naa a2200241 a 4500
001 1546510
005 2000-11-22
008 1999 bl --- 0-- u #d
100 1 $aLILIENFEIN, J.
245 $aAnnual course of matric potential in differently used savanna oxisols in Brazil.
260 $c1999
520 $aSustainable land use in periodically dry Brasilian savannas requires a water-saving management. We hypothesized that the annual course of matric potentials (simbolo) in very-fine, isohyperthermic Anionic Acrustoxes of Pinus plantations (PI), degraded (DP) and productive pastures (PP) no-till (NT) and conventional tillage (CT) cropping, and natural savanna (Cerrado, CE) differed significantly. On three plots in each of these land-use systems water input and (simbolo) at the 0.15-, 0.30-, 0.80-, 1.2-, and 2.0-m depths was measured with tensiometers weekly between 27 Mar. 1997 and 28 Apr. 1998.Precipitation between 29 Apr. 1997 and 28 Apr.1998 was 1562 mm,with only 210 mm in May to September, when (simbolo) at the 0.15-and 0,30-m depths decreased to less than -80kPa in all systems; the lowest (simbolo) at 2-m depth was -57kPa. During the monitored period, the PI soils had lower average (simbolo) at the 0,8- to 2-m depths (-60 kPa) than those in CE (-46), indicating higher rainfall interception losses and higher transpiration. In CT, average (simbolo) values at the 0.8-to 2-m depths (-29) were higher than in NT (-51) because of different crops and different soil management. Between june and November, (simbolo) at the 2-m depth in CE decreased to a lower value (-42) than in vegetation-free CT (-22) and NT (-27). In DP and PP soils, (simbolo) were similar to those in CE soils at all depths. The estimated average water storage in the upper 2 m during the monitored period was 565 mm (CT) > 553 (PP) > 541 (DP) > 537 (CE) > 526 (NT) > 479 (PI).Our results show that mainly the vegetation type and tillage practices control the annual course of matric potencial in differently used savanna Oxisols.
650 $aFerralsols
650 $asoil water
650 $aCerrado
650 $aOxisol
653 $aAgua de solo
700 1 $aWILCKE, W.
700 1 $aAYARZA, M. A.
700 1 $aLIMA, S. do C.
700 1 $aVILELA, L.
700 1 $aZECH, W.
773 $tSoil Society of American Journal, Madison$gv.63, p.1778-1785, 1999.
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Registro original: |
Embrapa Cerrados (CPAC) |
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| Registros recuperados : 50 | |
| 21. |  | WESTERHOF, R.; BUURMAN, P.; GRIETHUYSEN, C. van; AYARZA, M. A.; VILELA, L.; ZECH, W. Aggregation studied by laser diffraction in relation to plowing, soil organic matter, and lime in the Brazilian cerrados. In: THOMAS, R.; AYARZA, M.A., ed. Sustainable land management for the oxisols of the Latin American savannas: dynamics of soil organic matter and indicators of soil quality. Cali: CIAT, 1999. p.64-76.| Biblioteca(s): Embrapa Cerrados. |
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| 23. | | LILIENFEIN, J.; WILCKE, W.; AYARZA, M. A.; VILELA, L.; LIMA, S. do C.; ZECH, W. Chemical fractionation of phosphorus, sulphur, and molybdenum in Brazilian savannah oxisols under different land use. Geoderma, Amsterdam, v. 96, p. 31-46, 2000.| Biblioteca(s): Embrapa Cerrados. |
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| 24. | | ARAUJO, A. G. de; AYARZA, M. A.; FRIESEN, D. K.; VILELA, L. Fracoes organicas e inorganicas de fosforo em um solo de cerrado sob diferentes sistemas de manejo. In: SIMPOSIO SOBRE O CERRADO, 8.; INTERNATIONAL SYMPOSIUM ON TROPICAL SAVANNAS, 1., 1996, Brasilia, DF. Biodiversidade e producao sustentavel de alimentos e fibras nos Cerrados: anais... Planaltina: EMBRAPA-CPAC, 1996. p.319-322.| Biblioteca(s): Embrapa Cerrados. |
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| 25. | | SMITH, J.; CADAVID, J. V.; AYARZA, M.; AGUIAR, J. L. P. de; ROSA, R. Land use change in soybean production systems in the Brazilian savanna: the role of policy and market conditions. Journal of Sustainable Agriculture, Binghamton, v.15, n.2/3, p.95-117, 1999.| Biblioteca(s): Embrapa Cerrados. |
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| 26. | | LILIENFEIN, J.; WILCKE, W.; NEUFELDT, M.; AYARZA, M. A.; ZECH, W. Land-use effects on organic carbon, nitrogen, and sulphur concentrations in macroaggregates of differently textured Brazilian oxisols. Journal of Plant Nutrition and Soil Science, Berlin, v.161, n.2, p.165-171, 1998.| Biblioteca(s): Embrapa Cerrados. |
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| 29. | | AYARZA, M. A.; VILELA, L.; BARCELLOS, A. de O.; BALBINO, L. C.; BROSSARD, M.; PASINI, A. Integration culture-elevage dans les cerrados au Brasil: une solution pour des systemes durables. Agriculture et Developpement, Montpellier, n.18, p.91-98, juin 1998.| Biblioteca(s): Embrapa Cerrados. |
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| 30. | | AYARZA, M. A.; VILELA, L.; BARCELLOS, A. de O.; BALBINO, L. C.; BROSSARD, M.; PASINI, A. Integration culture-elevage dans les cerrados au Bresil: une solution pour des systemes durables. Agriculture et Developpement, Montpellier, n. 18, p. 91-98, juin 1998.| Tipo: Artigo em Periódico Indexado |
| Biblioteca(s): Embrapa Arroz e Feijão. |
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| 33. | | PIZARRO, E. A.; AYARZA, M. A.; SPAIN, J. M.; CARVALHO, M. A.; SOUZA, M. A. de. Efecto de la irrigacion en la produccion de semillas de Stylosanthes guianensis cv. Mineirao. Pasturas Tropicales, Cali, v.15, n.3, p.27-28, 1993.| Biblioteca(s): Embrapa Cerrados. |
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| 34. | | RENZ, T. E.; NEUFELDT, H.; AYARZA, M. A.; RESCK, D. V. S.; ZECH, W. Microbial biomass, microbial activity, and carbon pools under different land-use systems in the Brazilian cerrados. In: THOMAS, R.; AYARZA, M.A., ed. Sustainable land management for the oxisols of the Latin American savannas: dynamics of soil organic matter and indicators of soil quality. Cali: CIAT, 1999. p.187-197.| Biblioteca(s): Embrapa Cerrados. |
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| 36. | | FUHRMANN, S.; NEUFELDT, H.; WESTERHOF, R.; AYARZA, M. A.; SILVA, J. E. da; ZECH, W. Soil organic carbon, carbohydrates, amino sugars, and potentially mineralizable nitrogen under different land-use systems in oxisols of the Brazilian cerrados. In: THOMAS, R.; AYARZA, M.A., ed. Sustainable land management for the oxisols of the Latin American savannas: dynamics of soil organic matter and indicators of soil quality. Cali: CIAT, 1999. p.110-122.| Biblioteca(s): Embrapa Cerrados. |
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| 38. | | LILIENFEIN, J.; WILCKE, W.; AYARZA, M. A.; VILELA, L.; LIMA, S. do C.; ZECK, W. Soil acidification in Pinus caribaea forests on Brazilian savanna oxisols. Forest Ecology and Management, Amsterdam, v. 128, p. 145-157, 2000.| Biblioteca(s): Embrapa Cerrados. |
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| 39. | | AYARZA, M. A.; VILELA, L.; PIZARRO, E. A.; COSTA, P. H. da. Sistemas agropastoriles basados en leguminosas de usos multiples. In: GUIMARAES, E.P.; SANZ, J.I.; RAO, I.M.; AMEZQUITA, M.C.; AMEZQUITA, E., ed. Sistemas agropastoriles en sabanas tropicales de America Latina. Cali: CIAT/Brasilia: Embrapa, 1999. p.175-193.| Biblioteca(s): Embrapa Cerrados. |
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| Registros recuperados : 50 | |
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| Nenhum registro encontrado para a expressão de busca informada. |
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