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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. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Solos. |
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Data corrente: |
15/04/2004 |
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Data da última atualização: |
25/10/2020 |
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Autoria: |
MACHADO, P. L. O. de A.; SOHI, S. P.; GAUNT, J. L. |
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Afiliação: |
PEDRO LUIZ OLIVEIRA DE A MACHADO, CNPS. |
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Título: |
Effect of no-tillage on turnover of organic matter in a Rhodic Ferralsol. |
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Ano de publicação: |
2003 |
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Fonte/Imprenta: |
Soil Use and Management, v. 19, n. 3, p. 250-256, Sept. 2003. |
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DOI: |
https://doi.org/10.1111/j.1475-2743.2003.tb00311.x |
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Idioma: |
Inglês |
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Conteúdo: |
Soil organic matter (SOM) is considered to be key to sustainability of agriculture in the tropics. In southern Brazil, no-tillage has been adopted widely to control soil erosion, but its impact on the dynamics of SOM is not well established. We measured soil carbon (C) and d13C in two crop rotations, one of which contained C4 maize (Zea mays L.), after 21 years of contrasting tillage (conventional tillage versus no-tillage). Adjacent sites that reflected historic land-uses were also sampled. In the tillage experiment there was no effect of tillage on the total amount of C in the 0-40 cm profile (even when contrasting bulk density was accounted for), and the concentration of C differed only in the 0-5 cm and 5-10 cm layers. However, the occasional input of C4 material in the maize rotation resulted in a significant effect of rotation on d13C (P <0.001). Using 13C as a tracer for the SOM formed since the start of the experiment, we estimated the abundance of 'recent' and 'old' C within each depth interval. We found the main effect of tillage was to increase the medium-term turnover of SOM, particularly in the subsoil (i.e. below 20 cm depth). Compared with no-tillage, there was almost five times more recent C in the subsoil, and 20% more recent C in the 0?40 cm profile as a whole. |
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Thesagro: |
Ferralsolo; Matéria Orgânica; Plantio Direto. |
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Thesaurus Nal: |
Ferralsols; No-tillage; Soil organic matter. |
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Categoria do assunto: |
P Recursos Naturais, Ciências Ambientais e da Terra |
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Marc: |
LEADER 02004naa a2200229 a 4500
001 1335978
005 2020-10-25
008 2003 bl uuuu u00u1 u #d
024 7 $ahttps://doi.org/10.1111/j.1475-2743.2003.tb00311.x$2DOI
100 1 $aMACHADO, P. L. O. de A.
245 $aEffect of no-tillage on turnover of organic matter in a Rhodic Ferralsol.$h[electronic resource]
260 $c2003
520 $aSoil organic matter (SOM) is considered to be key to sustainability of agriculture in the tropics. In southern Brazil, no-tillage has been adopted widely to control soil erosion, but its impact on the dynamics of SOM is not well established. We measured soil carbon (C) and d13C in two crop rotations, one of which contained C4 maize (Zea mays L.), after 21 years of contrasting tillage (conventional tillage versus no-tillage). Adjacent sites that reflected historic land-uses were also sampled. In the tillage experiment there was no effect of tillage on the total amount of C in the 0-40 cm profile (even when contrasting bulk density was accounted for), and the concentration of C differed only in the 0-5 cm and 5-10 cm layers. However, the occasional input of C4 material in the maize rotation resulted in a significant effect of rotation on d13C (P <0.001). Using 13C as a tracer for the SOM formed since the start of the experiment, we estimated the abundance of 'recent' and 'old' C within each depth interval. We found the main effect of tillage was to increase the medium-term turnover of SOM, particularly in the subsoil (i.e. below 20 cm depth). Compared with no-tillage, there was almost five times more recent C in the subsoil, and 20% more recent C in the 0?40 cm profile as a whole.
650 $aFerralsols
650 $aNo-tillage
650 $aSoil organic matter
650 $aFerralsolo
650 $aMatéria Orgânica
650 $aPlantio Direto
700 1 $aSOHI, S. P.
700 1 $aGAUNT, J. L.
773 $tSoil Use and Management$gv. 19, n. 3, p. 250-256, Sept. 2003.
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| 4. |  | MADARI, B.; SOHI, S. P.; MAHIEU, N.; GAUNT, J. L.; NEMETH, T.; MICHELI, E. The efect of fertilisation on the molecular composition of soil organic matter fractions. In: ENCONTRO BRASILEIRO DE SUBSTÂNCIAS HÚMICAS, 4., 2001, Viçosa. Resumo de palestras e trabalhos apresentados. Viçosa: UFV, Departamento de Solos, 2001. p. 64-67| Biblioteca(s): Embrapa Solos. |
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| 5. | | SOHI, S. P.; MAHIEU, N.; POWLSON, D. S.; MADARI, B. E.; SMITTENBERG, R. H.; GAUNT, J. L. Investigating the chemical characteristics of soil organic matter fractions suitable for modeling. Soil Science Society of America Journal, v. 69, n. 4, p. 1248-1255, Jul. 2005. Na publicação: Beatá Madari.| Tipo: Artigo em Periódico Indexado |
| Biblioteca(s): Embrapa Solos. |
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| 6. | | ALHO, C. F. B. V.; CROSS, A.; SOHI, S. P.; MAIA, C. M. B. de F.; NOVOTNY, E. H.; LELIS, R. C. da C. Pyrolysis final temperature effects on biochar stability. In: ENCONTRO BRASILEIRO DE SUBSTÂNCIAS HÚMICAS, 9., 2011, Aracaju. Matéria orgânica natural e substâncias húmicas: dos avanços das técnicas de caracterização ao seqüestro de C. [Aracaju: UFS: IHSS, 2011]. 1 CD-ROM.| Tipo: Artigo em Anais de Congresso |
| Biblioteca(s): Embrapa Florestas; Embrapa Solos. |
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| 7. | | MACHADO, P. L. O. de A; DUNN, W. A.; OLIVEIRA, E. L. de; SOHI, S. P.; POULTON, P. R.; GAUNT, J. L. The effects of tillage and crop rotation on organic matter content and distribution. In: REUNIAO BRASILEIRA DE FERTILIDADE DE SOLO E NUTRICAO DE PLANTAS, 23.; REUNIAO BRASILEIRA SOBRE MICORRIZAS, 7.; SIMPOSIO BRASILEIRO DE MICROBIOLOGIA DO SOLO, 5.; REUNIAO BRASILEIRA DE BIOLOGIA DO SOLO, 2., 1998, Caxambu, MG.Resumos... Lavras: UFLA /SBCS / SBM, 1998. p.119. FERTBIO 98: Interrelacao fertilidade, biologia do solo e nutricao de plantas: consolidacao de um paradigma.| Biblioteca(s): Embrapa Solos. |
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