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Registro Completo |
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Biblioteca(s): |
Embrapa Cerrados. |
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Data corrente: |
05/06/1998 |
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Data da última atualização: |
05/06/1998 |
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Autoria: |
RITCHEY, K. D.; SOUSA, D. M. G. |
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Título: |
Use of gypsum in management of subsoil acidity in Oxisols. |
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Ano de publicação: |
1997 |
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Fonte/Imprenta: |
In: MONIZ, A.C.; FURLANI, A.M.C.; SCHAFFERT, R.E.; FAGERIA, N.K.; ROSOLEM, C.A.; CANTARELLA, H., ed. Plant-soil interactions at low pH: sustainable agriculture and forestry production. Campinas: Brazilian Soil Science Society, 1997. |
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Páginas: |
p.165-178. |
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Idioma: |
Inglês |
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Notas: |
Trabalho apresentado no "Fourth International Symposium on Plant-Soil Interactions at low pH, Belo Horizonte, MG, Brazil, Mar. 1996." |
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Conteúdo: |
Subsoil acidity decreases yields by limiting deep root growth of Al-sensitive plants. The benefits of gypsum (CaSO42H2O) in promoting root growth in Oxisols have been studied in Brazil for more than 15 years. In contrast to agricultural limestone, the solubility of gypsum is high enough to allow considerable movement below the plow layer. Gypsum reduces detrimental effects of subsoil acidity on root growth in several ways. The presence of high levels of Ca eliminates nutritional deficiency of this element and reduces Al saturation. The sulfate anion exchanges with hydroxyl ions on surfaces of hydrous oxides and slightly raises the pH ("self-liming"). Sulfate forms a non-toxic complex with Al3+ and the remaining Al3+ is decreased by the higher ionic strength of the solution. Deeper root growth resulting from gypsum allows increased uptake of water from below the plow layer during drought periods and also improves nutrient uptake. These factors have resulted in yield increases in annual and perennial crops as high as 100%, with positive crop responses continuing at least 5 years after inital gypsum application. |
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Palavras-Chave: |
Aluminium; Brasil. |
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Thesagro: |
Acidez do Solo; Alumínio; Cálcio; Cerrado; Gesso; Lixiviação; Toxidez. |
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Thesaurus Nal: |
Brazil; calcium; gypsum; leaching; soil pH; toxicity. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02223naa a2200337 a 4500
001 1554267
005 1998-06-05
008 1997 bl uuuu u00u1 u #d
100 1 $aRITCHEY, K. D.
245 $aUse of gypsum in management of subsoil acidity in Oxisols.
260 $c1997
300 $ap.165-178.
500 $aTrabalho apresentado no "Fourth International Symposium on Plant-Soil Interactions at low pH, Belo Horizonte, MG, Brazil, Mar. 1996."
520 $aSubsoil acidity decreases yields by limiting deep root growth of Al-sensitive plants. The benefits of gypsum (CaSO42H2O) in promoting root growth in Oxisols have been studied in Brazil for more than 15 years. In contrast to agricultural limestone, the solubility of gypsum is high enough to allow considerable movement below the plow layer. Gypsum reduces detrimental effects of subsoil acidity on root growth in several ways. The presence of high levels of Ca eliminates nutritional deficiency of this element and reduces Al saturation. The sulfate anion exchanges with hydroxyl ions on surfaces of hydrous oxides and slightly raises the pH ("self-liming"). Sulfate forms a non-toxic complex with Al3+ and the remaining Al3+ is decreased by the higher ionic strength of the solution. Deeper root growth resulting from gypsum allows increased uptake of water from below the plow layer during drought periods and also improves nutrient uptake. These factors have resulted in yield increases in annual and perennial crops as high as 100%, with positive crop responses continuing at least 5 years after inital gypsum application.
650 $aBrazil
650 $acalcium
650 $agypsum
650 $aleaching
650 $asoil pH
650 $atoxicity
650 $aAcidez do Solo
650 $aAlumínio
650 $aCálcio
650 $aCerrado
650 $aGesso
650 $aLixiviação
650 $aToxidez
653 $aAluminium
653 $aBrasil
700 1 $aSOUSA, D. M. G.
773 $tIn: MONIZ, A.C.; FURLANI, A.M.C.; SCHAFFERT, R.E.; FAGERIA, N.K.; ROSOLEM, C.A.; CANTARELLA, H., ed. Plant-soil interactions at low pH: sustainable agriculture and forestry production. Campinas: Brazilian Soil Science Society, 1997.
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Embrapa Cerrados (CPAC) |
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| Registros recuperados : 58 | |
| 2. |  | RITCHEY, K. D. N fertilization. In: AGRONOMIC-ECONOMIC RESEARCH ON SOILS OF THE TROPICS. 1978-1979 report. Raleigh, N.C.:, North Carolina State University, 1980. p.61-65.| Biblioteca(s): Embrapa Cerrados. |
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| 7. | | COUTO, W.; RITCHEY, K. D. Enxofre. Planaltina: EMBRAPA-CPAC, 1983. Trabalho apresentado no Seminario "Imposto das relacoes solo-agua-clima-planta na agricultura de sequeiro dos cerrados".| Biblioteca(s): Embrapa Cerrados. |
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| 8. | | COUTO, W.; RITCHEY, K. D. Enxofre. In: GOEDERT, W. J. (Ed.). Solos dos cerrados: tecnologias e estratégias de manejo. Planaltina, DF: EMBRAPA-CPAC; São Paulo: Nobel, 1986. p. 223-235.| Biblioteca(s): Embrapa Cerrados. |
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| 14. | | RITCHEY, K. D.; SOUSA, D. M. G. Use of gypsum in management of subsoil acidity in Oxisols. In: MONIZ, A.C.; FURLANI, A.M.C.; SCHAFFERT, R.E.; FAGERIA, N.K.; ROSOLEM, C.A.; CANTARELLA, H., ed. Plant-soil interactions at low pH: sustainable agriculture and forestry production. Campinas: Brazilian Soil Science Society, 1997. p.165-178. Trabalho apresentado no "Fourth International Symposium on Plant-Soil Interactions at low pH, Belo Horizonte, MG, Brazil, Mar. 1996."| Biblioteca(s): Embrapa Cerrados. |
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| Registros recuperados : 58 | |
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| Nenhum registro encontrado para a expressão de busca informada. |
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