| |
|
|
|
Registro Completo |
|
Biblioteca(s): |
Embrapa Cerrados. |
|
Data corrente: |
17/03/2005 |
|
Data da última atualização: |
17/03/2005 |
|
Autoria: |
LILIENFEIN, J.; WILCKE, W.; AYARZA, M. A.; VILELA, L.; LIMA, S. do C.; ZECH, W. |
|
Título: |
Chemical fractionation of phosphorus, sulphur, and molybdenum in Brazilian savannah oxisols under different land use. |
|
Ano de publicação: |
2000 |
|
Fonte/Imprenta: |
Geoderma, Amsterdam, v. 96, p. 31-46, 2000. |
|
Idioma: |
Inglês |
|
Conteúdo: |
In soils, P. S, and Mo occur organically bound or as oxyanions. In oxisols, oxyanions may be strongly sorbed due to the high positive surface charge. The objective of this work was to compare chemical fractions of P. S. and Mo in differently used Oxisols with similar properties in an on-farm experiment. Soil samples (0-0.15m) were taken from three replicate plots of each of conventional tillage (CT) and no-till (NT) maize-soybean and conventional tillage sugarcane (SC) cropping systems, degraded (DP) and productive pastures (PP), Eucalyptus (EU) and Pinus reforestations (PI), and native savannah (CE). The samples were sequentially extracted with (1) 0.5 M NaHCO3, (2) 0.1 M NaOH, (3) 1 M HCI, (4) hot concentrated HCl, and (5) concentrated HClO4/HNO3. In the extracts, inorganic (Pi) and total P, S, and Mo were determined. Organic P (Po) was calculated as total P-Pi. Total concentrations were 333-567 mg P kg (elevado a -1), 231-284 mg S kg (elevado a -1), and 3.2-3.9 mg Mo kg (elevado a -1). The most important fractions in all studied systems were the NaOH fraction for P (38-49% of total P), the HClO4/HNO3 fraction for S (27-35% of total S) and the concentrated HCl fraction for Mo (86-90% of total Mo). The proportion of the more easily extracted NaHCO3+NaOH fractions decreased along the line S>P>Mo. Fertilisation increased plant-availble P and S fractions in CT and NT whereas recalcitrant fraction (concentrated HCl and HClO4/HNO3) remained unchanged. The Pi/Po ratios in NT and CT were higher than CE because fertiliser P mainly accumulated in inorganic P fractions. The pasture soil had lower P concentrations indicating export by grazing. Thus, 12-20 years of land use had marked effects on P. smaller ones on S. and almost none on Mo concentrations and chemical fractions. MenosIn soils, P. S, and Mo occur organically bound or as oxyanions. In oxisols, oxyanions may be strongly sorbed due to the high positive surface charge. The objective of this work was to compare chemical fractions of P. S. and Mo in differently used Oxisols with similar properties in an on-farm experiment. Soil samples (0-0.15m) were taken from three replicate plots of each of conventional tillage (CT) and no-till (NT) maize-soybean and conventional tillage sugarcane (SC) cropping systems, degraded (DP) and productive pastures (PP), Eucalyptus (EU) and Pinus reforestations (PI), and native savannah (CE). The samples were sequentially extracted with (1) 0.5 M NaHCO3, (2) 0.1 M NaOH, (3) 1 M HCI, (4) hot concentrated HCl, and (5) concentrated HClO4/HNO3. In the extracts, inorganic (Pi) and total P, S, and Mo were determined. Organic P (Po) was calculated as total P-Pi. Total concentrations were 333-567 mg P kg (elevado a -1), 231-284 mg S kg (elevado a -1), and 3.2-3.9 mg Mo kg (elevado a -1). The most important fractions in all studied systems were the NaOH fraction for P (38-49% of total P), the HClO4/HNO3 fraction for S (27-35% of total S) and the concentrated HCl fraction for Mo (86-90% of total Mo). The proportion of the more easily extracted NaHCO3+NaOH fractions decreased along the line S>P>Mo. Fertilisation increased plant-availble P and S fractions in CT and NT whereas recalcitrant fraction (concentrated HCl and HClO4/HNO3) remained unchanged. The Pi/Po ratios in NT and ... Mostrar Tudo |
|
Thesagro: |
Cerrado; Eucalipto; Reflorestamento. |
|
Thesaurus Nal: |
Pinus. |
|
Categoria do assunto: |
-- |
|
Marc: |
LEADER 02429naa a2200229 a 4500
001 1568612
005 2005-03-17
008 2000 bl uuuu u00u1 u #d
100 1 $aLILIENFEIN, J.
245 $aChemical fractionation of phosphorus, sulphur, and molybdenum in Brazilian savannah oxisols under different land use.
260 $c2000
520 $aIn soils, P. S, and Mo occur organically bound or as oxyanions. In oxisols, oxyanions may be strongly sorbed due to the high positive surface charge. The objective of this work was to compare chemical fractions of P. S. and Mo in differently used Oxisols with similar properties in an on-farm experiment. Soil samples (0-0.15m) were taken from three replicate plots of each of conventional tillage (CT) and no-till (NT) maize-soybean and conventional tillage sugarcane (SC) cropping systems, degraded (DP) and productive pastures (PP), Eucalyptus (EU) and Pinus reforestations (PI), and native savannah (CE). The samples were sequentially extracted with (1) 0.5 M NaHCO3, (2) 0.1 M NaOH, (3) 1 M HCI, (4) hot concentrated HCl, and (5) concentrated HClO4/HNO3. In the extracts, inorganic (Pi) and total P, S, and Mo were determined. Organic P (Po) was calculated as total P-Pi. Total concentrations were 333-567 mg P kg (elevado a -1), 231-284 mg S kg (elevado a -1), and 3.2-3.9 mg Mo kg (elevado a -1). The most important fractions in all studied systems were the NaOH fraction for P (38-49% of total P), the HClO4/HNO3 fraction for S (27-35% of total S) and the concentrated HCl fraction for Mo (86-90% of total Mo). The proportion of the more easily extracted NaHCO3+NaOH fractions decreased along the line S>P>Mo. Fertilisation increased plant-availble P and S fractions in CT and NT whereas recalcitrant fraction (concentrated HCl and HClO4/HNO3) remained unchanged. The Pi/Po ratios in NT and CT were higher than CE because fertiliser P mainly accumulated in inorganic P fractions. The pasture soil had lower P concentrations indicating export by grazing. Thus, 12-20 years of land use had marked effects on P. smaller ones on S. and almost none on Mo concentrations and chemical fractions.
650 $aPinus
650 $aCerrado
650 $aEucalipto
650 $aReflorestamento
700 1 $aWILCKE, W.
700 1 $aAYARZA, M. A.
700 1 $aVILELA, L.
700 1 $aLIMA, S. do C.
700 1 $aZECH, W.
773 $tGeoderma, Amsterdam$gv. 96, p. 31-46, 2000.
Download
Esconder MarcMostrar Marc Completo |
|
Registro original: |
Embrapa Cerrados (CPAC) |
|
|
Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
URL |
Voltar
|
|
|
| Registros recuperados : 86 | |
| 61. |  | BIRK, J. J.; STEINER, C.; TEIXEIRA, W. G.; ZECH, W.; GLASER, B. Microbial response to charcoal amendments and fertilization of a highly weathered tropical soil. In: WOODS, W. I.; TEIXEIRA, W. G.; LEHMANN, J.; STEINER, C.; WINKLERPRINS, A.; REBELLATO, L. (Ed.). Amazonian dark earths: Wim Sombroek's vision. Berlin: Springer, 2009. p. 309-324.| Tipo: Capítulo em Livro Técnico-Científico |
| Biblioteca(s): Embrapa Amazônia Ocidental. |
|    |
| 68. | | 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. |
| |
| 70. | | ZECH, W.; SCHROTH, G.; CRAVO, M. D. S.; TEIXEIRA, W. G.; KAISER, K.; LEHMANN, J. Water and nutrient fluxes as indicators for the sustainability of different land-use systems on the terra firme near Manaus - a project overview. In: SHIFT-WORKSHOP, 3., 1998, Manaus. Proceedings... Hamburg: GKSS, 1998. p. 435-440. il.| Tipo: Artigo em Anais de Congresso |
| Biblioteca(s): Embrapa Amazônia Oriental. |
|  |
| 71. | | ZECH, W.; SCHROTH, G.; CRAVO, M. da S.; TEIXEIRA, W. G.; KAISER, K.; LEHMANN, J. Water and nutrient fluxes as indicators for the sustainability of different land-use systems on the terra firme near Manaus - a project overview. In: SHIFT - WORKSHOP, 3., 1998, Manaus. Proceedings... Bonn: BMBF, 1998. p. 435-440.| Tipo: Artigo em Anais de Congresso |
| Biblioteca(s): Embrapa Amazônia Ocidental. |
| |
| 72. | | ZECH, W.; SCHROTH, G.; TEIXEIRA, W. G.; CRAVO, M.; KAISER, K.; LEHMANN, J. Water and nutrient fluxes as indicators for the sustainability of different land-use systems on the terra firme near Manaus. In: SHIFT WORKSHOP, 3., 1998, Manaus. Program, abstracts of presentations and posters... Hamburg: GKSS, 1998. p. P26.| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Amazônia Ocidental. |
| |
| 74. | | STEINER, C.; TEIXEIRA, W. G.; NARAYAN, S.; MAJOR, J.; LEHMANN, J.; ZECH, W.; BLUM, W. E. H. Corte e carbonização como uma alternativa ao corte e queima: estudos na Amazônia. In: TEIXEIRA, W. G.; KERN, D. C.; MADARI, B. E.; LIMA, H. N.; WOODS, I. W. (Ed.). As terras pretas de índio da Amazônia: sua caracterização e uso deste conhecimento na criação de novas áreas. Manaus: EDUA/Embrapa Amazônia Ocidental, 2010. p. 298-306.| Tipo: Capítulo em Livro Técnico-Científico |
| Biblioteca(s): Embrapa Amazônia Ocidental. |
| |
| 75. | | FRASCOLI, A. C.; LIMA, S. do C.; LILIENFEIN, J.; WILKE, W.; ZECH, W.; AYARZA, M. A.; VILELA, L. Caracterizacao dos solos sob cerrado na chapada Uberlandia-Uberaba (MG). In:CONGRESSO DE CIENCIAS HUMANAS, LETRAS E ARTES, 4.; MOSTRA DE CIENCIAS HUMANAS, LETRAS E ARTES DAS UNIVERSIDADES FEDERAIS DE MINAS GERAIS, 4., 1999, Vicosa, MG. Universidade e ciencias humanas: contrastes e perspectivas: anais. Vicosa: FUNREI, 1999. nao paginado.| Biblioteca(s): Embrapa Cerrados. |
| |
| 76. | | ZECH, W.; CRAVO, M. da S.; LAABS, V.; PINTO, A.; LILIENFEIN, J.; GLASER, B.; TEIXEIRA, W.; LEHMANN, J. New approaches towards sustainability of land-use systems in Tropical Brazil. In: GERMAN-BRAZILIAN WORKSHOP ON NEOTROPICAL ECOSYSTEMS. ACHIEVEMENTS AND PROSPECTS OF COOPERATIVE RESEARCH, 2000, Hamburg. Proceedings... Hamburg: SHIFT: MADAM: WAVES, 2002. p. 118-119.| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Amazônia Ocidental. |
| |
| 77. | | ZECH, W.; CRAVO, M. da S.; LAABS, V.; PINTO, A.; LILIENFEIN, J.; GLASER, B.; WENCESLAU, T.; LEHMANN, J. New approaches towards sustainability of land-use systems in tropical Brazil. In: GERMAN-BRAZILIAN WORKSHOP ON NEOTROPICAL ECOSYSTEMS, 2000, Hamburg. Program and abstracts... Hamburg: University, 2000. p. 30| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Amazônia Ocidental. |
| |
| 78. | | STEINER, C.; TEIXEIRA, W. G.; LEHMANN, J.; NEHLS, T.; MACÊDO, J. L. V. de; BLUM, W. E. H.; ZECH, W. Long term effects of manure, charcoal and mineral fertilization on crop production and fertility on a highly weathered Central Amazonian upland soil. Plant and Soil, v. 291, n. 1-2, p. 275-290, 2007.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: Internacional - A |
| Biblioteca(s): Embrapa Amazônia Ocidental. |
| |
| 79. | | STEINER, C.; TEIXEIRA, W. G.; LEHMANN, J.; NEHLS, T.; MACEDO, J. L. V. de; BLUM, W. E. H.; ZECH, W. Long term effects of manure, charcoal and mineral fertilization on crop production and fertility on a highly weathered Central Amazonian upland soil. In: STEINER, C. (Comp.). Slash and char as alternative to slash and burn - soil charcoal amendments maintain soil fertility and establish a carbon sink. Göttingen: Cuvillier, 2007. p. 89-105.| Tipo: Capítulo em Livro Técnico-Científico |
| Biblioteca(s): Embrapa Amazônia Ocidental. |
| |
| 80. | | SCHROTH, G.; SILVA, L. F. da; SEIXAS, R.; TEIXEIRA, W. G.; MACÊDO, J. L. V.; ZECH, W. Subsoil accumulation of mineral nitrogen under polyculture and monoculture plantations, fallow and primary forest in a ferralitic Amazonian upland soil. Agriculture, Ecosystems and Environment, v. 75, p. 109-120, 1999.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: Internacional - A |
| Biblioteca(s): Embrapa Amazônia Ocidental. |
| |
| Registros recuperados : 86 | |
|
| Nenhum registro encontrado para a expressão de busca informada. |
|
|
