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| 4. |  | RAWLINS, B. G.; FERGUSON, A. J.; CHILTON, P. J.; ARTHURTON, R. S.; REES, J. G.; BALDOCK, J. W. Review of agricultural pollution in the Caribbean with particular emphasis on small island developing states. Marine Pollution Bulletin, v.36, n.9, p.658-668, 1998.| Biblioteca(s): Embrapa Pantanal. |
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| 5. | | SOUSSANA, J-F.; ARIAS-NAVARRO, C.; BISPO, A.; CHENU, C.; SMITH, P.; KUHNERT, M.; FRELIH-LARSEN, A.; HERB, I.; KUIKMAN, P.; KEESSTRA, S.; VERHAGEN, J.; CLAESSENS, L.; MADARI, B. E.; DEMENOIS, J.; ALBRECHT, A.; VERCHOT, L.; MONTANARELLA, L.; HIEDERER, R.; GRUNDY, M.; BALDOCK, J.; CHOTTE, J-L.; KIM, J. Strategic research agenda on soil carbon in agricultural soils. Wageningen: CIRCASA, 2020. European Union's Horizon 2020 research and innovation programme grant agreement No 774378. Coordination of International Research Cooperation on soil Carbon Sequestration in Agriculture.| Biblioteca(s): Embrapa Arroz e Feijão. |
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 | Acesso ao texto completo restrito à biblioteca da Embrapa Instrumentação. Para informações adicionais entre em contato com cnpdia.biblioteca@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Instrumentação. |
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Data corrente: |
10/08/2020 |
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Data da última atualização: |
16/08/2022 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
A - 1 |
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Autoria: |
BRIEDIS, C.; BALDOCK, J.; MORAES SÁ, J. C.; SANTOS, J. B.; McGOWAN, J.; MILORI, D. M. B. P. |
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Afiliação: |
DEBORA MARCONDES BASTOS PEREIRA, CNPDIA. |
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Título: |
Organic carbon pools and organic matter chemical composition in response to different land uses in southern Brazil. |
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Ano de publicação: |
2021 |
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Fonte/Imprenta: |
European Journal of Soil Science, v. 72, n. 3, 2021. |
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Páginas: |
1083-1100 |
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ISSN: |
1351-0754 |
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DOI: |
10.1111/ejss.12972 |
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Idioma: |
Inglês |
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Conteúdo: |
The adoption of conservation agriculture (e.g., no-till system) has been recognized as pivotal to maintaining soil functions, but the potential of this system to enhance organic carbon (OC) quantity and quality and how this OC is stabilized in soils are not well established. In this study, we evaluated the effects of land-use types (native vegetation (NV) vs. no-till system (NT)) on OC stocks and on the chemical composition of organic matter (OM), and sought to understand the mechanisms that govern OC protection in the studied highly weathered soils. To achieve these objectives, we used an OC fractionation scheme in a combination of solid-state 13C nuclear magnetic resonance (NMR) spectroscopic analyses in soils from six farms in southern Brazil. Our results showed smaller OC stocks (whole soil) under NT than under NV in four of the six sites. In addition, the OC stock differences between land-use types were larger in coarser textured soils and in those where conventional tillage was used before the adoption of NT. Among fractions, particulate organic carbon (POC) represented only 8% of the whole OC stock but was the fraction most affected by land-use type. In contrast, the humus organic carbon (HOC) fraction contributed 78% of the whole OC stock and was little altered by land-use type. Resistant organic carbon (ROC) represented 14% of the whole OC stock and it was altered by land-use type, demonstrating that this fraction is not as inert as previously thought. Overall, OM chemical composition was quite similar between land uses, with O-alkyl-C being the predominant C type. This labile component was further highly correlated with OC stock and silt + clay contents, indicating that the accumulation of OC in these highly weathered soils is mainly a response to the association between labile C compounds and minerals. MenosThe adoption of conservation agriculture (e.g., no-till system) has been recognized as pivotal to maintaining soil functions, but the potential of this system to enhance organic carbon (OC) quantity and quality and how this OC is stabilized in soils are not well established. In this study, we evaluated the effects of land-use types (native vegetation (NV) vs. no-till system (NT)) on OC stocks and on the chemical composition of organic matter (OM), and sought to understand the mechanisms that govern OC protection in the studied highly weathered soils. To achieve these objectives, we used an OC fractionation scheme in a combination of solid-state 13C nuclear magnetic resonance (NMR) spectroscopic analyses in soils from six farms in southern Brazil. Our results showed smaller OC stocks (whole soil) under NT than under NV in four of the six sites. In addition, the OC stock differences between land-use types were larger in coarser textured soils and in those where conventional tillage was used before the adoption of NT. Among fractions, particulate organic carbon (POC) represented only 8% of the whole OC stock but was the fraction most affected by land-use type. In contrast, the humus organic carbon (HOC) fraction contributed 78% of the whole OC stock and was little altered by land-use type. Resistant organic carbon (ROC) represented 14% of the whole OC stock and it was altered by land-use type, demonstrating that this fraction is not as inert as previously thought. Overall, OM c... Mostrar Tudo |
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Palavras-Chave: |
Carbon fractions; Carbon stabilization mechanisms; Native vegetation; Weathered soil. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02650naa a2200265 a 4500
001 2124250
005 2022-08-16
008 2021 bl uuuu u00u1 u #d
022 $a1351-0754
024 7 $a10.1111/ejss.12972$2DOI
100 1 $aBRIEDIS, C.
245 $aOrganic carbon pools and organic matter chemical composition in response to different land uses in southern Brazil.$h[electronic resource]
260 $c2021
300 $a1083-1100
520 $aThe adoption of conservation agriculture (e.g., no-till system) has been recognized as pivotal to maintaining soil functions, but the potential of this system to enhance organic carbon (OC) quantity and quality and how this OC is stabilized in soils are not well established. In this study, we evaluated the effects of land-use types (native vegetation (NV) vs. no-till system (NT)) on OC stocks and on the chemical composition of organic matter (OM), and sought to understand the mechanisms that govern OC protection in the studied highly weathered soils. To achieve these objectives, we used an OC fractionation scheme in a combination of solid-state 13C nuclear magnetic resonance (NMR) spectroscopic analyses in soils from six farms in southern Brazil. Our results showed smaller OC stocks (whole soil) under NT than under NV in four of the six sites. In addition, the OC stock differences between land-use types were larger in coarser textured soils and in those where conventional tillage was used before the adoption of NT. Among fractions, particulate organic carbon (POC) represented only 8% of the whole OC stock but was the fraction most affected by land-use type. In contrast, the humus organic carbon (HOC) fraction contributed 78% of the whole OC stock and was little altered by land-use type. Resistant organic carbon (ROC) represented 14% of the whole OC stock and it was altered by land-use type, demonstrating that this fraction is not as inert as previously thought. Overall, OM chemical composition was quite similar between land uses, with O-alkyl-C being the predominant C type. This labile component was further highly correlated with OC stock and silt + clay contents, indicating that the accumulation of OC in these highly weathered soils is mainly a response to the association between labile C compounds and minerals.
653 $aCarbon fractions
653 $aCarbon stabilization mechanisms
653 $aNative vegetation
653 $aWeathered soil
700 1 $aBALDOCK, J.
700 1 $aMORAES SÁ, J. C.
700 1 $aSANTOS, J. B.
700 1 $aMcGOWAN, J.
700 1 $aMILORI, D. M. B. P.
773 $tEuropean Journal of Soil Science$gv. 72, n. 3, 2021.
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