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Registro Completo |
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Biblioteca(s): |
Embrapa Pantanal. |
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Data corrente: |
05/07/1996 |
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Data da última atualização: |
05/07/1996 |
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Autoria: |
KHOMVILAI, S.; BLUE, W. G. |
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Título: |
Effects of lime and potassium sources on the retention of potassium by some Florida mineral soils. |
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Ano de publicação: |
1977 |
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Fonte/Imprenta: |
Proceedings Soil and Crop Science Society of Florida, v.36, p.84-89, 1977. |
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Idioma: |
Inglês |
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Conteúdo: |
Potasssium retention from KCl, K2SO4, KH2PO4 and K2CO3 was studied in three coarse-textured, Florida mineral soils - Red Bay fine sandy loam (fine-loamy, siliceous, thermic Rhodic Paleudult): Myakka fine sand )sandy, siliceous, hyperthermic Aeric Haplaquod); and Astatula sand (hyperthermic uncoated Typic Quartzipsamment). Each soil was limed with CaCO3 and dolomitic lime (separately) in approximately 2-meq/100g increments through approximately 8 meq/100g and incubated with 20% moisture for 8 weeks. Soil pH was increased with lime rates and levealed off at approximately pH 8 for CaCO3 and pH 7 for dolomitic lime. The effective cation exchange capacity (ECEC) was increased by addition of both CaCO3 and dolomitic lime. Potassioum retention was increased in some cases by the first lime increment. Retention was decreased with increasing rates of CaCO3 the order of decrease being Astatyla > Myakka > Red Bay. Dolomitic lime had less adverse effect on K retention than CaCO3. Even though ECEC was increased by incorporation of lime materials, competition for absorption sites by Ca and to a lesser extent by Mg apparently reduced K rentention.Potassium from K2CO3 was retained most efficiently in these soils: 80 to 90% of K from an application of 1 meq/100g of soil was retained in the unlimed soils. The order of retention from different sources was K2CO3 > KH2PO4 > K2SO4 ~KCl. The probable explanation for efficient K retention from K2CO3 in unliomed soils is that its reaction increased pH and activated pH-dependent exchange siotes without providing a competing ion. At low pH values phosphate probably reacted with the positive charges associated with Al and Fe compouinds and increased the net negative charge at a given soil pH, thereby permitting efficient K retention. At pH values above 7.0 the added phosphate probably was pricipitated as Ca and Mg phosphate which would have the effect of removing the anion from the soil solutions as well as reducing soil solution Ca and Mg concentrations. MenosPotasssium retention from KCl, K2SO4, KH2PO4 and K2CO3 was studied in three coarse-textured, Florida mineral soils - Red Bay fine sandy loam (fine-loamy, siliceous, thermic Rhodic Paleudult): Myakka fine sand )sandy, siliceous, hyperthermic Aeric Haplaquod); and Astatula sand (hyperthermic uncoated Typic Quartzipsamment). Each soil was limed with CaCO3 and dolomitic lime (separately) in approximately 2-meq/100g increments through approximately 8 meq/100g and incubated with 20% moisture for 8 weeks. Soil pH was increased with lime rates and levealed off at approximately pH 8 for CaCO3 and pH 7 for dolomitic lime. The effective cation exchange capacity (ECEC) was increased by addition of both CaCO3 and dolomitic lime. Potassioum retention was increased in some cases by the first lime increment. Retention was decreased with increasing rates of CaCO3 the order of decrease being Astatyla > Myakka > Red Bay. Dolomitic lime had less adverse effect on K retention than CaCO3. Even though ECEC was increased by incorporation of lime materials, competition for absorption sites by Ca and to a lesser extent by Mg apparently reduced K rentention.Potassium from K2CO3 was retained most efficiently in these soils: 80 to 90% of K from an application of 1 meq/100g of soil was retained in the unlimed soils. The order of retention from different sources was K2CO3 > KH2PO4 > K2SO4 ~KCl. The probable explanation for efficient K retention from K2CO3 in unliomed soils is that its reaction increased p... Mostrar Tudo |
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Palavras-Chave: |
Dolomitic lime; Effective cation exchange capacity; Red Bay fine sandy loam; Retencao; Retention; Zero point of charge. |
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Thesagro: |
Mineral; Potássio; Solo. |
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Thesaurus Nal: |
potassium; soil. |
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Categoria do assunto: |
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Marc: |
LEADER 02771naa a2200265 a 4500
001 1789316
005 1996-07-05
008 1977 bl --- 0-- u #d
100 1 $aKHOMVILAI, S.
245 $aEffects of lime and potassium sources on the retention of potassium by some Florida mineral soils.
260 $c1977
520 $aPotasssium retention from KCl, K2SO4, KH2PO4 and K2CO3 was studied in three coarse-textured, Florida mineral soils - Red Bay fine sandy loam (fine-loamy, siliceous, thermic Rhodic Paleudult): Myakka fine sand )sandy, siliceous, hyperthermic Aeric Haplaquod); and Astatula sand (hyperthermic uncoated Typic Quartzipsamment). Each soil was limed with CaCO3 and dolomitic lime (separately) in approximately 2-meq/100g increments through approximately 8 meq/100g and incubated with 20% moisture for 8 weeks. Soil pH was increased with lime rates and levealed off at approximately pH 8 for CaCO3 and pH 7 for dolomitic lime. The effective cation exchange capacity (ECEC) was increased by addition of both CaCO3 and dolomitic lime. Potassioum retention was increased in some cases by the first lime increment. Retention was decreased with increasing rates of CaCO3 the order of decrease being Astatyla > Myakka > Red Bay. Dolomitic lime had less adverse effect on K retention than CaCO3. Even though ECEC was increased by incorporation of lime materials, competition for absorption sites by Ca and to a lesser extent by Mg apparently reduced K rentention.Potassium from K2CO3 was retained most efficiently in these soils: 80 to 90% of K from an application of 1 meq/100g of soil was retained in the unlimed soils. The order of retention from different sources was K2CO3 > KH2PO4 > K2SO4 ~KCl. The probable explanation for efficient K retention from K2CO3 in unliomed soils is that its reaction increased pH and activated pH-dependent exchange siotes without providing a competing ion. At low pH values phosphate probably reacted with the positive charges associated with Al and Fe compouinds and increased the net negative charge at a given soil pH, thereby permitting efficient K retention. At pH values above 7.0 the added phosphate probably was pricipitated as Ca and Mg phosphate which would have the effect of removing the anion from the soil solutions as well as reducing soil solution Ca and Mg concentrations.
650 $apotassium
650 $asoil
650 $aMineral
650 $aPotássio
650 $aSolo
653 $aDolomitic lime
653 $aEffective cation exchange capacity
653 $aRed Bay fine sandy loam
653 $aRetencao
653 $aRetention
653 $aZero point of charge
700 1 $aBLUE, W. G.
773 $tProceedings Soil and Crop Science Society of Florida$gv.36, p.84-89, 1977.
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Registro original: |
Embrapa Pantanal (CPAP) |
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| Registros recuperados : 7 | |
| 1. |  | CONRAD, J. H.; SOUSA, J. C.; MENDES, M. O.; BLUE, W. G.; McDOWELL, L. R. Fe, Mn, Na and Zn interrelationships in a tropical soil, plant and animal system. In: CONFERENCIA MUNDIAL DE PRODUCCION ANIMAL, 4., 1978. Buenos Aires. Resumenes... Buenos Aires, 1978. p.80.| Biblioteca(s): Embrapa Gado de Corte. |
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| 2. | | SOUSA, J. C. de; CONRAD, J. H.; MCADOWELL, L. R.; AMMERMAN, C. B.; BLUE, W. G. Inter-relações entre minerais no solo, forrageiras e tecido animal. 2. Cobre e molibdênio. Pesquisa Agropecuária Brasileira, Brasília, DF, v. 15, n. 3, p. 335-341, jul. 1980 Título em inglês: Inter-reationsship among mineral in soil, forage, ano animal tissues. 2. Cooper and molybdenum.| Biblioteca(s): Embrapa Unidades Centrais. |
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| 3. | | SOUSA, J. C; CONRAD, J. H.; BLUE, W. G.; AMMERMAN, C. B.; MCDOWELL, L. R. Inter-relacoes entre minerais no solo, plantas forrageiras e tecido animal. 3. Manganes, ferro e cobalto. REUNIAO ANUAL DA SOCIEDADE BRASILEIRA DE ZOOTECNIA, 17, 1980, Fortaleza. Anais... Fortaleza: Sociedade Brasileira de Zootecnia, 1980. p.445. CNPGC| Biblioteca(s): Embrapa Gado de Corte. |
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| 4. | | SOUSA, J. C. de; CONRAD, J. H.; MCADOWELL, L. R.; AMMERMAN, C. B.; BLUE, W. G.; SOUSA, J. C. de; CONRAD, J. H.; McDOWELL, L. R.; AMMERMAN, C. B.; BLUE, W. G. Inter-Relacoes entre Minerais no Solo, Foorageiras e Tecido Animal. 2. Cobre e Molibdenio. Pesquisa Agropecuaria Brasileira, Brasilia, v.15, n.3, p.335-341, jul.1980| Biblioteca(s): Embrapa Gado de Corte. |
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| 5. | | SOUSA, J. C. de; CONRAD, J. H.; MOTT, G. O.; McDOWELL, L. R.; AMMERMAN, C. B.; BLUE, W. G. Interrelações entre minerais no solo, plantas forrageiras e tecido animal no norte de Mato Grosso. 4. Zinco, magnésio, sódio e potássio. Pesquisa Agropecuaria Brasileira, Brasilia, v.17, n.1, p. 11-20, jan. 1982. Título em inglês: Interrrelationships among mineral levels in soil, forage, and animal tissues on ranches in northern Mato Grosso 4 zinc, magnesium, sodium and potassium| Biblioteca(s): Embrapa Unidades Centrais. |
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| 6. | | AMMERMAN, C. B.; VALDIVIA, R.; ROSA, I. V.; HENRY, P. R.; FEASTER, J. P.; BLUE, W. G. Effect of sand or soil as a dietary component on phosphorus utilization by sheep. Journal of Animal Science, Champaign, v.59, n.4, p.1092-1099, out. 1984.| Biblioteca(s): Embrapa Gado de Corte. |
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| 7. | | SOUSA, J. C. de; BLUE, C. W. G.; MCDOWELL, L. R.; SOUSA, J. C. de; CONRAD, J. H.; MOTT, G. O.; McDOWELL, L. R.; AMMERMAN, C. B.; BLUE, W. G. Inter-relacoes entre Minerais no Solo, Plantas Forrageiras e Tecido Animal I. Calcio e Fosforo. Pesquisa Agropecuaria Brasileira, Brasilia, v.14, n.4, p.387-395.1979| Biblioteca(s): Embrapa Gado de Corte. |
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| Registros recuperados : 7 | |
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| Nenhum registro encontrado para a expressão de busca informada. |
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