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| Registros recuperados : 75 | |
| Registros recuperados : 75 | |
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 | Acesso ao texto completo restrito à biblioteca da Embrapa Meio Ambiente. Para informações adicionais entre em contato com cnpma.biblioteca@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Meio Ambiente. |
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Data corrente: |
10/05/2007 |
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Data da última atualização: |
24/08/2015 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
Internacional - A |
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Autoria: |
PÉREZ, M. G.; MARTIN NETO, L.; COLNAGO, L. A.; MILORI, D. M. B. P.; CAMARGO, O. A. de; BERTON, R.; BETTIOL, W. |
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Afiliação: |
M. G. PÉREZ, IQ/USP; LADISLAU MARTIN NETO, DE/P&D; LUIZ ALBERTO COLNAGO, CNPDIA; D. M. B. P. MILORI, IQSC/USP; O. A. de CAMARGO, IQSC/USP; R. BERTON, IAC; WAGNER BETTIOL, CNPMA. |
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Título: |
Characterization of humic acids extracted from sewage sludge-amended oxisols by electron paramagnetic resonance. |
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Ano de publicação: |
2006 |
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Fonte/Imprenta: |
Soil & Tillage Research, Amsterdam, v. 91, p. 95-100, 2006. |
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Idioma: |
Inglês |
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Conteúdo: |
In tropical soils, the high turnover rate and mineralization of organic matter (OM) associated with intensive agricultural use, generally leads to faster soil degradation than that observed in temperate climatic zones. The application of sewage sludge to the soils is one proposed method of maintaining soil organic matter, and is also an alternative method of disposing of this waste product. As well as containing large quantities of OM, sludge is also a significant source of supplementary nitrogen, phosphorus and other essential nutrients for plant growth. However, it is necessary to understand the qualitative and quantitative changes that take place in the OM in soil treated with sewage sludge. The approach of the present study was intended to identify possible structural changes caused by sewage sludge applications on soil humic acids (HAs). The HAs extracted from a Typic Achrortox under sewage sludge applications were characterized by electron paramagnetic resonance (EPR) spectroscopy. The soil samples were collected from a field experiment designed to evaluate the effects of different doses of sewage sludge on corn growth and development in Brazil. The sewage sludge originated from urban waste treated at the sewage sludge treatment station in the city of Franca, state of Sao Paulo, Brazil. The following soil treatments were studied: control (non-cultivated soil under natural vegetation (NC)), control soil amended with NPK (conventional corn fertilization) and four treatments N1, N2, N4 and N8 with applications of 3.5, 7, 14 and 28 Mg ha1 of sewage sludge (dry matter), respectively. HAs were extracted from the surface layer using the methodology of the International Humic Substance Society (IHSS). Fe3+ and VO2+ ions complexed with HAs, and also semiquinone-type free radical (SFR) at concentrations of approximately 2.0 1018 spins g1 HAwere identified in EPR spectra. The levels of SFR were lower for treatments where the applied sewage sludge doses were equivalent to four and eight times the normal doses of N mineral fertilization, reaching values of 1.7 1018 and 1.24 1018 spins g1 HA, respectively. The observed decrease in SFR content as sewage sludge dose was increased, was probably associated with the incorporation of less aromatic components into HAs originating from the sewage sludge. MenosIn tropical soils, the high turnover rate and mineralization of organic matter (OM) associated with intensive agricultural use, generally leads to faster soil degradation than that observed in temperate climatic zones. The application of sewage sludge to the soils is one proposed method of maintaining soil organic matter, and is also an alternative method of disposing of this waste product. As well as containing large quantities of OM, sludge is also a significant source of supplementary nitrogen, phosphorus and other essential nutrients for plant growth. However, it is necessary to understand the qualitative and quantitative changes that take place in the OM in soil treated with sewage sludge. The approach of the present study was intended to identify possible structural changes caused by sewage sludge applications on soil humic acids (HAs). The HAs extracted from a Typic Achrortox under sewage sludge applications were characterized by electron paramagnetic resonance (EPR) spectroscopy. The soil samples were collected from a field experiment designed to evaluate the effects of different doses of sewage sludge on corn growth and development in Brazil. The sewage sludge originated from urban waste treated at the sewage sludge treatment station in the city of Franca, state of Sao Paulo, Brazil. The following soil treatments were studied: control (non-cultivated soil under natural vegetation (NC)), control soil amended with NPK (conventional corn fertilization) and four treatme... Mostrar Tudo |
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Palavras-Chave: |
Degradação; Efeitos; Micronutriente. |
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Thesagro: |
Adubo de Esgoto; Fertilizante; Lodo Residual; Matéria orgânica; Milho; Mineralização; Solo; Tratamento do solo. |
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Categoria do assunto: |
P Recursos Naturais, Ciências Ambientais e da Terra |
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Marc: |
LEADER 03255naa a2200325 a 4500
001 1015374
005 2015-08-24
008 2006 bl uuuu u00u1 u #d
100 1 $aPÉREZ, M. G.
245 $aCharacterization of humic acids extracted from sewage sludge-amended oxisols by electron paramagnetic resonance.$h[electronic resource]
260 $c2006
520 $aIn tropical soils, the high turnover rate and mineralization of organic matter (OM) associated with intensive agricultural use, generally leads to faster soil degradation than that observed in temperate climatic zones. The application of sewage sludge to the soils is one proposed method of maintaining soil organic matter, and is also an alternative method of disposing of this waste product. As well as containing large quantities of OM, sludge is also a significant source of supplementary nitrogen, phosphorus and other essential nutrients for plant growth. However, it is necessary to understand the qualitative and quantitative changes that take place in the OM in soil treated with sewage sludge. The approach of the present study was intended to identify possible structural changes caused by sewage sludge applications on soil humic acids (HAs). The HAs extracted from a Typic Achrortox under sewage sludge applications were characterized by electron paramagnetic resonance (EPR) spectroscopy. The soil samples were collected from a field experiment designed to evaluate the effects of different doses of sewage sludge on corn growth and development in Brazil. The sewage sludge originated from urban waste treated at the sewage sludge treatment station in the city of Franca, state of Sao Paulo, Brazil. The following soil treatments were studied: control (non-cultivated soil under natural vegetation (NC)), control soil amended with NPK (conventional corn fertilization) and four treatments N1, N2, N4 and N8 with applications of 3.5, 7, 14 and 28 Mg ha1 of sewage sludge (dry matter), respectively. HAs were extracted from the surface layer using the methodology of the International Humic Substance Society (IHSS). Fe3+ and VO2+ ions complexed with HAs, and also semiquinone-type free radical (SFR) at concentrations of approximately 2.0 1018 spins g1 HAwere identified in EPR spectra. The levels of SFR were lower for treatments where the applied sewage sludge doses were equivalent to four and eight times the normal doses of N mineral fertilization, reaching values of 1.7 1018 and 1.24 1018 spins g1 HA, respectively. The observed decrease in SFR content as sewage sludge dose was increased, was probably associated with the incorporation of less aromatic components into HAs originating from the sewage sludge.
650 $aAdubo de Esgoto
650 $aFertilizante
650 $aLodo Residual
650 $aMatéria orgânica
650 $aMilho
650 $aMineralização
650 $aSolo
650 $aTratamento do solo
653 $aDegradação
653 $aEfeitos
653 $aMicronutriente
700 1 $aMARTIN NETO, L.
700 1 $aCOLNAGO, L. A.
700 1 $aMILORI, D. M. B. P.
700 1 $aCAMARGO, O. A. de
700 1 $aBERTON, R.
700 1 $aBETTIOL, W.
773 $tSoil & Tillage Research, Amsterdam$gv. 91, p. 95-100, 2006.
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