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Registro Completo |
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Biblioteca(s): |
Embrapa Cerrados. |
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Data corrente: |
16/07/1999 |
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Data da última atualização: |
16/07/1999 |
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Autoria: |
LILIENFEIN, J.; WILCKE, W.; NEUFELDT, H.; AYARZA, M. A.; ZECH, W. |
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Título: |
Phosphorus pools in bulk soil and aggregates of differently textured oxisols under different land-use systems in the Brazilian cerrados. |
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Ano de publicação: |
1999 |
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Fonte/Imprenta: |
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. |
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Páginas: |
p.159-172. |
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Idioma: |
Inglês |
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Conteúdo: |
This study assessed the influence of land use (continuous cropping, CC; tree plantations, F; pastures, PG; and native savanna, NS) on P concentrations and partitioning in bulk soil and two aggregate size fractions of two Oxisols, one loamy and one clayey. The quantity and quality of physically protected P within aggregates were also determined. Total P in bulk soil and macroaggregates (0.25-2 mm and 2/8 mm) was partitioned into inorganic and organic P fractions (Pi and Po, respectively) after sequential extractionally, P binding was examined with 31P nuclear magnetic resonance spectroscopy. Total P concentrations were 70-170 mg/kg in the loamy and 300-450 mg/kg in the clayey soil. The largest P fraction was the NaOH-soluble P (33%-55% of total P concentration). The proportion of easily extractable P was higher in the loamy than in the clayey soil. Because of fertilization, CC and F had higher total and, particularly, higher easily available P concentrations than NS and PG. In the loamy soil Pi and, in the clayey soil, both Pi and Po, were higher in CC and F than in NS and PG. In the loamy soil, P concentrations in macroaggregates (>2mm) were higher than in bulk soil. Higher monoester P proportions within the large mnacroaggregates in unplowed systems indicated older intra-aggregate soil organic matter that at the aggregate surfaces. In the plowed systems, the monoester/diester ratio was not different between bulk soil and aggregate fractions, indicating faster aggregate turnover. MenosThis study assessed the influence of land use (continuous cropping, CC; tree plantations, F; pastures, PG; and native savanna, NS) on P concentrations and partitioning in bulk soil and two aggregate size fractions of two Oxisols, one loamy and one clayey. The quantity and quality of physically protected P within aggregates were also determined. Total P in bulk soil and macroaggregates (0.25-2 mm and 2/8 mm) was partitioned into inorganic and organic P fractions (Pi and Po, respectively) after sequential extractionally, P binding was examined with 31P nuclear magnetic resonance spectroscopy. Total P concentrations were 70-170 mg/kg in the loamy and 300-450 mg/kg in the clayey soil. The largest P fraction was the NaOH-soluble P (33%-55% of total P concentration). The proportion of easily extractable P was higher in the loamy than in the clayey soil. Because of fertilization, CC and F had higher total and, particularly, higher easily available P concentrations than NS and PG. In the loamy soil Pi and, in the clayey soil, both Pi and Po, were higher in CC and F than in NS and PG. In the loamy soil, P concentrations in macroaggregates (>2mm) were higher than in bulk soil. Higher monoester P proportions within the large mnacroaggregates in unplowed systems indicated older intra-aggregate soil organic matter that at the aggregate surfaces. In the plowed systems, the monoester/diester ratio was not different between bulk soil and aggregate fractions, indicating faster aggregate turn... Mostrar Tudo |
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Thesagro: |
Cerrado; Estrutura do Solo; Fósforo; Fracionamento; Oxisol; Uso da Terra. |
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Thesaurus Nal: |
Ferralsols; fractionation; land use; phosphorus; soil structure. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02501naa a2200313 a 4500
001 1545408
005 1999-07-16
008 1999 bl uuuu u00u1 u #d
100 1 $aLILIENFEIN, J.
245 $aPhosphorus pools in bulk soil and aggregates of differently textured oxisols under different land-use systems in the Brazilian cerrados.
260 $c1999
300 $ap.159-172.
520 $aThis study assessed the influence of land use (continuous cropping, CC; tree plantations, F; pastures, PG; and native savanna, NS) on P concentrations and partitioning in bulk soil and two aggregate size fractions of two Oxisols, one loamy and one clayey. The quantity and quality of physically protected P within aggregates were also determined. Total P in bulk soil and macroaggregates (0.25-2 mm and 2/8 mm) was partitioned into inorganic and organic P fractions (Pi and Po, respectively) after sequential extractionally, P binding was examined with 31P nuclear magnetic resonance spectroscopy. Total P concentrations were 70-170 mg/kg in the loamy and 300-450 mg/kg in the clayey soil. The largest P fraction was the NaOH-soluble P (33%-55% of total P concentration). The proportion of easily extractable P was higher in the loamy than in the clayey soil. Because of fertilization, CC and F had higher total and, particularly, higher easily available P concentrations than NS and PG. In the loamy soil Pi and, in the clayey soil, both Pi and Po, were higher in CC and F than in NS and PG. In the loamy soil, P concentrations in macroaggregates (>2mm) were higher than in bulk soil. Higher monoester P proportions within the large mnacroaggregates in unplowed systems indicated older intra-aggregate soil organic matter that at the aggregate surfaces. In the plowed systems, the monoester/diester ratio was not different between bulk soil and aggregate fractions, indicating faster aggregate turnover.
650 $aFerralsols
650 $afractionation
650 $aland use
650 $aphosphorus
650 $asoil structure
650 $aCerrado
650 $aEstrutura do Solo
650 $aFósforo
650 $aFracionamento
650 $aOxisol
650 $aUso da Terra
700 1 $aWILCKE, W.
700 1 $aNEUFELDT, H.
700 1 $aAYARZA, M. A.
700 1 $aZECH, W.
773 $tIn: 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.
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Registro original: |
Embrapa Cerrados (CPAC) |
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 | Acesso ao texto completo restrito à biblioteca da Embrapa Amazônia Ocidental. Para informações adicionais entre em contato com cpaa.biblioteca@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Amazônia Ocidental. |
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Data corrente: |
09/05/2005 |
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Data da última atualização: |
31/01/2019 |
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Tipo da produção científica: |
Capítulo em Livro Técnico-Científico |
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Autoria: |
LEHMANN, J.; CAMPOS, C. V.; MACEDO, J. L. V. de; GERMAN, L. |
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Afiliação: |
JEFERSON LUIS VASCONCELOS DE MACEDO, CPAA. |
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Título: |
Sequential P fractionation of relict anthropogenic dark earths of Amazonia. |
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Ano de publicação: |
2004 |
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Fonte/Imprenta: |
In: GLASER, B.; WOODS, W. I. (Ed.). Amazonian dark earths: explorations in space and time. Berlin: Springer, 2004. p. 113-123. |
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Idioma: |
Inglês |
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Conteúdo: |
This study compares different P pools of two anthropogenic dark earths with unfertilized and fertilized terra firme soils from Central Amazonia. One anthrosol was collected near Rio Preto da Eva, 60 km north of Manaus, Brazil. The socond anthrosol was obtained from the lower Rio Negro in the community of Marajá. |
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Palavras-Chave: |
Brasil; Terra firme; Terra preta de índio. |
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Thesagro: |
Fósforo. |
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Thesaurus NAL: |
Amazonia. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 00969naa a2200217 a 4500
001 1675551
005 2019-01-31
008 2004 bl uuuu u00u1 u #d
100 1 $aLEHMANN, J.
245 $aSequential P fractionation of relict anthropogenic dark earths of Amazonia.
260 $c2004
520 $aThis study compares different P pools of two anthropogenic dark earths with unfertilized and fertilized terra firme soils from Central Amazonia. One anthrosol was collected near Rio Preto da Eva, 60 km north of Manaus, Brazil. The socond anthrosol was obtained from the lower Rio Negro in the community of Marajá.
650 $aAmazonia
650 $aFósforo
653 $aBrasil
653 $aTerra firme
653 $aTerra preta de índio
700 1 $aCAMPOS, C. V.
700 1 $aMACEDO, J. L. V. de
700 1 $aGERMAN, L.
773 $tIn: GLASER, B.; WOODS, W. I. (Ed.). Amazonian dark earths: explorations in space and time. Berlin: Springer, 2004. p. 113-123.
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