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| Registros recuperados : 23 | |
| 8. |  | FADIGAS, F. de S.; AMARAL SOBRINHO, M. N. B. do; MAZUR, N.; ANJOS, L. H. C. dos; FREIXO, A. A. Proposição de valores de referência para a concentração natural de metais pesados em solos brasileiros de metais pesados em solos brasileiros. Revista Brasileira de Engenharia Agrícola e Ambiental, v.10,n.3,jul.-set.,p.699-705,2006.| Biblioteca(s): Embrapa Algodão. |
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| 10. | | CONCEIÇÃO, M. da; SAAB, S. da C.; MARTIN NETO, L.; FREIXO, A. A.; ARAÚJO, W. S. A. de. Avaliação da relação da matéria orgânica com algumas propriedades físicas de solos orgânicos e gleissolos da baixada litorânea, RJ, e sua importância para o uso e manejo. In: ENCONTRO BRASILEIRO SOBRE SUBSTÂNCIAS HÚMICAS, 2., nov. 1997, São Carlos, SP. Anais...[Resumos...]. São Carlos: Embrapa-CNPDIA, 1997. p. 174.| Biblioteca(s): Embrapa Instrumentação. |
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| 11. | | CONCEICAO, M. da; SAAB, S. da C.; MARTIN NETO, L.; FREIXO, A. A.; ARAUJO, W. S. A. de. Avaliacao da relacao da materia organica com alguns propriedades fisicas de solos organicos e gleissolos da baixada litoranea, RJ, e sua importancia para o uso e manejo. In: ENCONTRO BRASILEIRO SOBRE SUBSTANCIAS HUMICAS, 2., 1997, Sao Carlos, SP. Anais... Sao Carlos: EMBRAPA-CNPDIA, 1997. p.174.| Biblioteca(s): Embrapa Solos. |
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| 12. | | FREIXO, A. A.; CONCEICAO, M. da; CUNHA, T. J. F.; SAAB, S. da C.; MARTIN NETO, L. Estudo comparativo do humus de quatro solos organicos do Estado do Rio de Janeiro. In: ENCONTRO BRASILEIRO SOBRE SUBSTANCIAS HUMICAS, 2., 1997, Sao Carlos, SP. Anais... Sao Carlos: EMBRAPA-CNPDIA, 1997. p.124.| Biblioteca(s): Embrapa Solos. |
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| 13. | | FREIXO, A. A.; CONCEIÇÃO, M. da; CUNHA, T. J. F.; SAAB, S. da C.; MARTIN-NETO, L. Estudo comparativo do húmus de quatro solos orgânicos do Estado do Rio de Janeiro. In: ENCONTRO BRASILEIRO SOBRE SUBSTÂNCIAS HÚMICAS, 2., nov. 1997, São Carlos, SP. Anais...[Resumos...]. São Carlos: Embrapa-CNPDIA, 1997. p. 124.| Biblioteca(s): Embrapa Instrumentação. |
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| 16. | | FREIXO, A. A.; CONCEIÇÃO, M. da; ARAÚJO, W. S. de; CUNHA, T. J. F.; MARTIN-NETO, L.; SAAB, S. da C. Caracterização das substâncias húmicas em solos orgânicos sob diversas atividades agrícolas. In: ENCONTRO BRASILEIRO SOBRE SUBSTÂNCIAS HÚMICAS, 3., 1999, Santa Maria. Matéria orgânica e qualidade ambiental: resumos de palestras e trabalhos apresentados em posters. Santa Maria: UFSM-Programa de Pós-Graduação em Agronomia-Departamento de Solos: Grupo Brasileiro de IHSS, 1999. p. 154-156.| Biblioteca(s): Embrapa Instrumentação. |
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| 17. | | MACHADO, P. L. O. de A.; SANTOS, H. P. dos; FREIXO, A. A.; OLIVEIRA, E. L. de; SILVA, C. A.; CONCEICAO, M. da; GAUNT, J. L. Long-term effects of no tillage on carbon sequestration of two oxisols from South Brazil. In: CONGRESO LATINOAMERICANO DE LA CIENCIA DEL SUELO, 14.; CONGRESO DE LA SOCIEDAD AGRONOMICA DE CHILE, 50.; CONGRESO NACIONAL DE LA CIENCIA DEL SUELO, 9., 1999, Temuco, Chile. Resumenes... Temuco: Universidad de la Frontera, 1999. p. 660.| Biblioteca(s): Embrapa Solos. |
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| 18. | | CONCEICAO, M. da; SAAB, S. da C.; MARTIN NETO, L.; FREIXO, A. A.; ARAUJO, W. S. A. de; MANZATTO, C. V.; CUNHA, T. J. F. Estudo comparativo de metodos de determinacao dos teores de materia organica em solos de varzea, RJ. In: ENCONTRO BRASILEIRO SOBRE SUBSTANCIAS HUMICAS, 2., 1997, Sao Carlos, SP. Anais... Sao Carlos: EMBRAPA-CNPDIA, 1997. p.175.| Biblioteca(s): Embrapa Solos. |
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| 19. | | CONCEIÇÃO, M. da; SAAB, S. da C.; MARTIN NETO, L.; FREIXO, A. A.; ARAÚJO, W. S. A. de; MANZATTO, C. V.; CUNHA, T. J. F. Estudo comparativo de métodos de determinação dos teores de matéria orgânica em solos de várzea, RJ. In: ENCONTRO BRASILEIRO SOBRE SUBSTÂNCIAS HÚMICAS, 2., nov. 1997, São Carlos, SP. Anais...[Resumos...]. São Carlos: Embrapa-CNPDIA, 1997. p. 175.| Biblioteca(s): Embrapa Instrumentação. |
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| 20. | | CONCEIÇÃO, M. da; MANZATTO, C. V.; ARAÚJO, W. S. de; CUNHA, T. J. F.; MARTIN NETO, L.; SAAB, S. da C.; FREIXO, A. A. Estudo comparativo de métodos de determinação do teor de matéria orgânica em organossollos: subsidios para a classificação e manejo do solo. In: REUNIAO BRASILEIRA DE MANEJO E CONSERVAÇÃO DO SOLO E DA ÁGUA, 13., 2000, Ilhéus. 500 anos de uso do solo no Brasil: [anais...]. Ilhéus: CEPLAC: CEPEC, 2000. 1 CD-ROM.| Biblioteca(s): Embrapa Solos. |
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| Registros recuperados : 23 | |
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 | Acesso ao texto completo restrito à biblioteca da Embrapa Solos. Para informações adicionais entre em contato com cnps.biblioteca@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Solos. |
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Data corrente: |
22/11/2002 |
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Data da última atualização: |
04/03/2020 |
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Autoria: |
FREIXO, A. A.; MACHADO, P. L. O. de A.; SANTOS, H. P. dos; SILVA, C. A.; FADIGAS, F. de S. |
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Afiliação: |
ALESSANDRA A. FREIXO, UFRRJ; PEDRO LUIZ OLIVEIRA DE A MACHADO, CNPS; HENRIQUE PEREIRA DOS SANTOS, CNPT; CARLOS A. SILVA, CNPS; FRANCISCO DE S. FADIGAS, UFRRJ. |
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Título: |
Soil organic carbon and fractions of a Rhodic Ferralsol under the influence of tillage and crop rotation systems in Southern Brazil. |
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Ano de publicação: |
2002 |
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Fonte/Imprenta: |
Soil & Tillage Research, v. 64, n. 3/4, p. 221-230, Mar. 2002. |
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Idioma: |
Inglês |
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Conteúdo: |
Soil organic matter (SOM) and its different pools have key importance in optimizing crop production, minimizing negative environmental impacts, and thus improving soil quality. The objective of this study was to evaluate the soil C and N contents in bulk soil and in different SOM pools (light and heavy fractions) of a clayey Rhodic Ferralsol after 13 years of different tillage and crop rotations in Passo Fundo, State of Rio Grande do Sul, Brazil. Soil samples were collected from no-tillage (no soil disturbance except for sowing; NT) and conventional tillage (disc plough followed by light disc harrowings; CT) applied to wheat/soybean (W/S) and wheat/soybean-vetch/maize (W/S-V/M) rotations. As reference, soil was sampled from a noncultivated area adjacent to the field experiment. The greatest soil C and N contents were found in non-cultivated soils in the 0-5 cm depth (45 g C kg-1 soil and 3.6 g N kg-1 soil). Crop cultivation led to a decrease in SOM content which was higher for CT soils (approx. 60% decrease in C and N contents) than NT soils (approx. 43% decrease in C and N contents) at 0-5 cm. Tillage had the greatest impact on soil C and N storage. Soils under NT did not contain higher C and N storage than CT soils below 5 cm depth. Significantly, higher amounts of organic carbon of FLF in CT (0.5-0.7 g C kg-1 soil) than in NT soils (0.2 g C kg-1 soil) at 10-20 cm depth were also observed and the differences in C and N storage between CT and NT soils in the 0-30 cm layer were not significant. Silt and clay fractions contained the largest amount of organic carbon (60-95% of total organic carbon), and free light fraction was the most sensitive pool of organic carbon to detect changes in SOM due to soil tillage and crop rotations. MenosSoil organic matter (SOM) and its different pools have key importance in optimizing crop production, minimizing negative environmental impacts, and thus improving soil quality. The objective of this study was to evaluate the soil C and N contents in bulk soil and in different SOM pools (light and heavy fractions) of a clayey Rhodic Ferralsol after 13 years of different tillage and crop rotations in Passo Fundo, State of Rio Grande do Sul, Brazil. Soil samples were collected from no-tillage (no soil disturbance except for sowing; NT) and conventional tillage (disc plough followed by light disc harrowings; CT) applied to wheat/soybean (W/S) and wheat/soybean-vetch/maize (W/S-V/M) rotations. As reference, soil was sampled from a noncultivated area adjacent to the field experiment. The greatest soil C and N contents were found in non-cultivated soils in the 0-5 cm depth (45 g C kg-1 soil and 3.6 g N kg-1 soil). Crop cultivation led to a decrease in SOM content which was higher for CT soils (approx. 60% decrease in C and N contents) than NT soils (approx. 43% decrease in C and N contents) at 0-5 cm. Tillage had the greatest impact on soil C and N storage. Soils under NT did not contain higher C and N storage than CT soils below 5 cm depth. Significantly, higher amounts of organic carbon of FLF in CT (0.5-0.7 g C kg-1 soil) than in NT soils (0.2 g C kg-1 soil) at 10-20 cm depth were also observed and the differences in C and N storage between CT and NT soils in the 0-30 cm layer w... Mostrar Tudo |
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Thesagro: |
Armazenamento; Matéria Orgânica; Solo. |
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Categoria do assunto: |
P Recursos Naturais, Ciências Ambientais e da Terra |
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Marc: |
LEADER 02423naa a2200205 a 4500
001 1337539
005 2020-03-04
008 2002 bl uuuu u00u1 u #d
100 1 $aFREIXO, A. A.
245 $aSoil organic carbon and fractions of a Rhodic Ferralsol under the influence of tillage and crop rotation systems in Southern Brazil.$h[electronic resource]
260 $c2002
520 $aSoil organic matter (SOM) and its different pools have key importance in optimizing crop production, minimizing negative environmental impacts, and thus improving soil quality. The objective of this study was to evaluate the soil C and N contents in bulk soil and in different SOM pools (light and heavy fractions) of a clayey Rhodic Ferralsol after 13 years of different tillage and crop rotations in Passo Fundo, State of Rio Grande do Sul, Brazil. Soil samples were collected from no-tillage (no soil disturbance except for sowing; NT) and conventional tillage (disc plough followed by light disc harrowings; CT) applied to wheat/soybean (W/S) and wheat/soybean-vetch/maize (W/S-V/M) rotations. As reference, soil was sampled from a noncultivated area adjacent to the field experiment. The greatest soil C and N contents were found in non-cultivated soils in the 0-5 cm depth (45 g C kg-1 soil and 3.6 g N kg-1 soil). Crop cultivation led to a decrease in SOM content which was higher for CT soils (approx. 60% decrease in C and N contents) than NT soils (approx. 43% decrease in C and N contents) at 0-5 cm. Tillage had the greatest impact on soil C and N storage. Soils under NT did not contain higher C and N storage than CT soils below 5 cm depth. Significantly, higher amounts of organic carbon of FLF in CT (0.5-0.7 g C kg-1 soil) than in NT soils (0.2 g C kg-1 soil) at 10-20 cm depth were also observed and the differences in C and N storage between CT and NT soils in the 0-30 cm layer were not significant. Silt and clay fractions contained the largest amount of organic carbon (60-95% of total organic carbon), and free light fraction was the most sensitive pool of organic carbon to detect changes in SOM due to soil tillage and crop rotations.
650 $aArmazenamento
650 $aMatéria Orgânica
650 $aSolo
700 1 $aMACHADO, P. L. O. de A.
700 1 $aSANTOS, H. P. dos
700 1 $aSILVA, C. A.
700 1 $aFADIGAS, F. de S.
773 $tSoil & Tillage Research$gv. 64, n. 3/4, p. 221-230, Mar. 2002.
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