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Registro Completo |
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Biblioteca(s): |
Embrapa Solos. |
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Data corrente: |
18/08/2015 |
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Data da última atualização: |
08/10/2021 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
MARQUES, F. A.; BUURMAN, P.; SCHELLEKENS, J.; VIDAL-TORRADO, P. |
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Afiliação: |
FLAVIO ADRIANO MARQUES, CNPS; PETER BUURMAN, WAGENINGEN UNIVERSITY; JUDITH SCHELLEKENS, ESALQ/USP; PABLO VIDAL-TORRADO, ESALQ/USP. |
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Título: |
Molecular chemistry in humic Ferralsols from Brazilian Cerrado and forest biomes indicates a major contribution from black carbon in the subsoil. |
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Ano de publicação: |
2015 |
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Fonte/Imprenta: |
Journal of Analytical and Applied Pyrolysis, v. 113, p. 518-528, May 2015. |
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DOI: |
https://doi.org/10.1016/j.jaap.2015.03.016 |
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Idioma: |
Inglês |
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Conteúdo: |
Soil organic matter (OM) stability plays an important role in the global carbon cycle. The molecular characterisation of soil OM may contribute to an understanding of the feedback mechanisms between soil OM and climate. Umbric Ferralsols with humic properties (humic Ferralsols) are characterised by a thick dark carbon-rich A horizon, and co-occur next to Umbric Ferralsols without humic characteristics. They are concentrated in south-eastern Brazil which suggests an environmental control. In order to understand OM stability in these soils, humic Ferralsols from three Brazilian biomes were studied, including Cerrado (savanna), subtropical forest and tropical forest. The studied soils were developed on several geological substrates, including basalt, gneiss, chamokites, phyllite and tertiary sediments. The molecular composition of the free light fraction (FLF), occluded light fraction (OLF) and 0.1 M NaOH extractable OM of samples from topsoil and subsoil from eight profiles was examined using analytical pyrolysis (pyrolysis-GC/MS). The light fraction reflects litter and charcoal, obtained by density fractionation before (FLF) and after (OLF) ultrasonic disruption; the NaOH extractable fraction (humic acid + fulvic acid) reflects more decomposed material. The chemical differences among soils from different Brazilian biomes were much smaller than the vertical gradient within each profile. The results showed that, within the light fractions, the content of which varied between 2% and 22% of the total carbon content (Ct), black carbon (BC) derived pyrolysis products showed a higher abundance in the topsoil. In the extractable OM, which varied between 46% and 88% of Ct, BC derived pyrolysis products showed a higher abundance in the subsoil. This suggests a continuous input of BC and an increase in the degree of decomposition with depth. Pyrolysis products associated with BC contributed up to 10% to the extractable pyrolysable fraction in the subsoil. The results suggest that degradation of charcoal, which is translocated to the subsoil by macroscopic soil organisms, results in a relative high contribution from naphthalene, 2-ethenylnaphthalene, phenanthrene, benzene, dibenzofuran and benzonitrile (subsoil) compared to (other) polyaromatic hydrocarbons (PAHs; C1-, C2- and C3-naphthalenes and fluorene) in relatively fresh charcoal (topsoil). The results highlight the importance of the subsoil in studies of the long term effects of fire on soil OM and suggest that BC is an important factor that underlies carbon stability in humic Ferralsols. MenosSoil organic matter (OM) stability plays an important role in the global carbon cycle. The molecular characterisation of soil OM may contribute to an understanding of the feedback mechanisms between soil OM and climate. Umbric Ferralsols with humic properties (humic Ferralsols) are characterised by a thick dark carbon-rich A horizon, and co-occur next to Umbric Ferralsols without humic characteristics. They are concentrated in south-eastern Brazil which suggests an environmental control. In order to understand OM stability in these soils, humic Ferralsols from three Brazilian biomes were studied, including Cerrado (savanna), subtropical forest and tropical forest. The studied soils were developed on several geological substrates, including basalt, gneiss, chamokites, phyllite and tertiary sediments. The molecular composition of the free light fraction (FLF), occluded light fraction (OLF) and 0.1 M NaOH extractable OM of samples from topsoil and subsoil from eight profiles was examined using analytical pyrolysis (pyrolysis-GC/MS). The light fraction reflects litter and charcoal, obtained by density fractionation before (FLF) and after (OLF) ultrasonic disruption; the NaOH extractable fraction (humic acid + fulvic acid) reflects more decomposed material. The chemical differences among soils from different Brazilian biomes were much smaller than the vertical gradient within each profile. The results showed that, within the light fractions, the content of which varied between 2%... Mostrar Tudo |
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Palavras-Chave: |
Black carbon; Floresta Atlântica; Pastagem do Cerrado; Pirólise. |
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Thesagro: |
Carbono; Latossolo; Subsolo. |
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Categoria do assunto: |
P Recursos Naturais, Ciências Ambientais e da Terra |
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Marc: |
LEADER 03403naa a2200253 a 4500
001 2022152
005 2021-10-08
008 2015 bl uuuu u00u1 u #d
024 7 $ahttps://doi.org/10.1016/j.jaap.2015.03.016$2DOI
100 1 $aMARQUES, F. A.
245 $aMolecular chemistry in humic Ferralsols from Brazilian Cerrado and forest biomes indicates a major contribution from black carbon in the subsoil.$h[electronic resource]
260 $c2015
520 $aSoil organic matter (OM) stability plays an important role in the global carbon cycle. The molecular characterisation of soil OM may contribute to an understanding of the feedback mechanisms between soil OM and climate. Umbric Ferralsols with humic properties (humic Ferralsols) are characterised by a thick dark carbon-rich A horizon, and co-occur next to Umbric Ferralsols without humic characteristics. They are concentrated in south-eastern Brazil which suggests an environmental control. In order to understand OM stability in these soils, humic Ferralsols from three Brazilian biomes were studied, including Cerrado (savanna), subtropical forest and tropical forest. The studied soils were developed on several geological substrates, including basalt, gneiss, chamokites, phyllite and tertiary sediments. The molecular composition of the free light fraction (FLF), occluded light fraction (OLF) and 0.1 M NaOH extractable OM of samples from topsoil and subsoil from eight profiles was examined using analytical pyrolysis (pyrolysis-GC/MS). The light fraction reflects litter and charcoal, obtained by density fractionation before (FLF) and after (OLF) ultrasonic disruption; the NaOH extractable fraction (humic acid + fulvic acid) reflects more decomposed material. The chemical differences among soils from different Brazilian biomes were much smaller than the vertical gradient within each profile. The results showed that, within the light fractions, the content of which varied between 2% and 22% of the total carbon content (Ct), black carbon (BC) derived pyrolysis products showed a higher abundance in the topsoil. In the extractable OM, which varied between 46% and 88% of Ct, BC derived pyrolysis products showed a higher abundance in the subsoil. This suggests a continuous input of BC and an increase in the degree of decomposition with depth. Pyrolysis products associated with BC contributed up to 10% to the extractable pyrolysable fraction in the subsoil. The results suggest that degradation of charcoal, which is translocated to the subsoil by macroscopic soil organisms, results in a relative high contribution from naphthalene, 2-ethenylnaphthalene, phenanthrene, benzene, dibenzofuran and benzonitrile (subsoil) compared to (other) polyaromatic hydrocarbons (PAHs; C1-, C2- and C3-naphthalenes and fluorene) in relatively fresh charcoal (topsoil). The results highlight the importance of the subsoil in studies of the long term effects of fire on soil OM and suggest that BC is an important factor that underlies carbon stability in humic Ferralsols.
650 $aCarbono
650 $aLatossolo
650 $aSubsolo
653 $aBlack carbon
653 $aFloresta Atlântica
653 $aPastagem do Cerrado
653 $aPirólise
700 1 $aBUURMAN, P.
700 1 $aSCHELLEKENS, J.
700 1 $aVIDAL-TORRADO, P.
773 $tJournal of Analytical and Applied Pyrolysis$gv. 113, p. 518-528, May 2015.
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Registro original: |
Embrapa Solos (CNPS) |
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| Registros recuperados : 105 | |
| 8. |  | CUNHA, T. J. F.; GIONGO, V.; MENDES, A. M. S.; MARQUES, F. A.; CANELLAS, L. P. Humified fraction of organic matter due to plant mixture cultivation. Revista Caatinga, Mossoró, v. 29, n. 3, p. 578-586, jul./set. 2016.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: B - 1 |
| Biblioteca(s): Embrapa Semiárido; Embrapa Solos. |
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| 10. | | ARAUJO FILHO, J. C. de; SILVA, C. B. da; MARQUES, F. A. Solos. In: PFALTZFRAFF, P. A. dos; TORRES, F. S. de M.; COSTA, M. R. da (org.). Caracterização do meio físico na pesquisa da geodiversidade da região metropolitana do Recife. Recife: CPRM, 2022. cap. 12, p. 108-120.| Tipo: Capítulo em Livro Técnico-Científico |
| Biblioteca(s): Embrapa Solos. |
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| 11. | | ARAUJO FILHO, J. C. de; RIBEIRO, M. R.; BURGOS, N.; MARQUES, F. A. Solos da caatinga. In: CURI, N.; KER, J. C.; NOVAIS, R. F.; VIDAL-TORRADO, P.; SCHAEFER, C. E. G. R. (Ed.). Pedologia: solos dos biomas brasileiros. Viçosa, MG: Sociedade Brasileira de Ciência do Solo, 2017. cap. 5, p. 227-260.| Tipo: Capítulo em Livro Técnico-Científico |
| Biblioteca(s): Embrapa Solos. |
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| 12. | | SCHAEFER, C. E. G. R.; OLIVEIRA, F. S. de; MARQUES, F. A. Solos das ilhas oceânicas. In: CURI, N.; KER, J. C.; NOVAIS, R. F.; VIDAL-TORRADO, P.; SCHAEFER, C. E. G. R. (Ed.). Pedologia: solos dos biomas brasileiros. Viçosa, MG: Sociedade Brasileira de Ciência do Solo, 2017. cap. 12, p. 546-597.| Tipo: Capítulo em Livro Técnico-Científico |
| Biblioteca(s): Embrapa Solos. |
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| 16. | | MARQUES, F. A.; ARAUJO FILHO, J. C. de; BARROS, A. H. C.; LOPES, E. H. B.; BARBOSA, G. M. N. Aptidão pedoclimática das culturas dos feijões caupi e comum para o estado de Alagoas. In: CONGRESSO BRASILEIRO DE CIÊNCIA DO SOLO, 33., 2011, Uberlândia. Solos nos biomas brasileiros: sustentabilidade e mudanças climáticas: anais. [Uberlândia]: SBCS: UFU, ICIAG, 2011. 1 CD-ROM.| Tipo: Artigo em Anais de Congresso |
| Biblioteca(s): Embrapa Solos. |
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| 18. | | SILVA, M. S. L. da; NASCIMENTO, A. F.; MARQUES, F. A.; FERREIRA, G. B.; OLIVEIRA NETO, M. B. de. Contribuição da barragem subterrânea na sustentabilidade socioeconômica e ambiental de um agroecossistema do médio sertão de Alagoas. In: SEMINÁRIO INTERNACIONAL DE AGROECOLOGIA, 2.; SEMINÁRIO DE AGROECOLOGIA DE PERNAMBUCO, 3.; JORNADA DOS POVOS DE PERNAMBUCO, 2., 2015, Recife. Diálogos de conhecimentos sobre agroecologia: terra, território e soberania alimentar: anais. Recife: UFRPE, 2015.| Tipo: Artigo em Anais de Congresso |
| Biblioteca(s): Embrapa Solos. |
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| 19. | | ARAUJO, J. K. S.; SOUZA-JÚNIOR, V. S.; MARQUES, F. A.; SOUZA, R. A. S.; VORONEY, P. Frações húmicas e caracterização termogravimétrica da humina de latossolos húmicos. In: CONGRESO LATINOAMERICANO DE LA CIENCIA DEL SUELO, 20.; CONGRESO PERUANO DE LA CIENCIA DEL SUELO, 16., 2014, Cusco. Educar para preservar el suelo y conservar la vida en la tierra: trabajos. Cusco: Sociedad Latinoamericana de la Ciencia del Suelo, 2014.| Tipo: Artigo em Anais de Congresso |
| Biblioteca(s): Embrapa Solos. |
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| 20. | | SANTANA, M. de B.; RIBEIRO FILHO, M. R.; MARQUES, F. A.; CUNHA, T. J. F.; NASCIMENTO, A. F. do. Variação da composição granulométrica em solos na Ilha de Assunção, Cabrobó - Pernambuco In: CONGRESSO BRASILEIRO DE CIÊNCIA DO SOLO, 35., 2015, Natal. O solo e suas múltiplas funções: anais. Natal: Sociedade Brasileira de Ciência do Solo, 2015.| Tipo: Artigo em Anais de Congresso |
| Biblioteca(s): Embrapa Agrossilvipastoril. |
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| Registros recuperados : 105 | |
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| Nenhum registro encontrado para a expressão de busca informada. |
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