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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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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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Embrapa Instrumentação (CNPDIA) |
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Registro Completo
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Biblioteca(s): |
Embrapa Soja. |
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Data corrente: |
30/06/2006 |
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Data da última atualização: |
19/03/2008 |
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Autoria: |
CRANCIANINOV, W. S.; MANDARINO, J. M. G.; CARRÃO-PANIZZI, M. C.; BENASSI, V. T. |
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Título: |
Teor de óleo e proteína em cultivares de soja da Embrapa. |
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Ano de publicação: |
2006 |
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Fonte/Imprenta: |
In: CONGRESSO BRASILEIRO DE SOJA, 4., 2006, Londrina. Resumos... Londrina: Embrapa Soja, 2006. |
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Páginas: |
p. 133. |
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Idioma: |
Português |
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Notas: |
Organizado por Odilon Ferreira Saraiva, Simone Ery Grosskopf. |
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Conteúdo: |
Os teores de óleo e proteína foram determinados em 17 cultivares de soja desenvolvidas pelo programa de melhoramento genético da Embrapa Soja (BRS 133, BRS 184, BRS 185, BRS 212, BRS 213, BRS 214, BRS 215, BRS 230, BRS 231, BRS 232, BRS 257, BRS 258, BRS 259, BRS 260, BRS 261, BRS 262 e Embrapa 48) produzidas em Londrina, PR na safra de 2004/2005, semeadas em outubro, novembro e dezembro. As amostras foram trituradas em moínho analítico e analisadas em triplicata. Para a determinação dos teores de óleo e proteína foram utilizadas as metodologias preconizadas pelas Normas Analíticas do Instituto Adolfo Lutz. Os resultados mostraram que os teores de óleo e proteína dos grãos não apresentam diferenças significativas, nas três épocas de semeadura. As cultivares BRS 257 e BRS 259 apresentaram os maiores teores de proteína nas três épocas de semeaduras: 40,2%; 42,2%; 41,4%, e 41,3%, 40,7%, 41,9%, respectivamente em outubro, novembro e dezembro. Os menores teores de proteína foram observados nas cultivares Embrapa 48 e BRS 133 com 36,9%; 37,7%; 36,5%; e 36,1%; 37,8%; e 37,1%, nas três épocas, respectivamente. A cultivar BRS 260 apresentou os maiores teores de óleo, 24,2% (outubro), 25,1% (novembro) e 23,8% (dezembro), enquanto a cultivar BRS 230 apresentou os menores teores de óleo: 20,2%, 20,0% e 20,3%, nas três épocas, respectivamente.
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Thesagro: |
Melhoramento Genético Vegetal; Soja; Variedade. |
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Categoria do assunto: |
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Marc: |
LEADER 02065naa a2200217 a 4500
001 1469308
005 2008-03-19
008 2006 bl uuuu u00u1 u #d
100 1 $aCRANCIANINOV, W. S.
245 $aTeor de óleo e proteína em cultivares de soja da Embrapa.
260 $c2006
300 $ap. 133.
500 $aOrganizado por Odilon Ferreira Saraiva, Simone Ery Grosskopf.
520 $aOs teores de óleo e proteína foram determinados em 17 cultivares de soja desenvolvidas pelo programa de melhoramento genético da Embrapa Soja (BRS 133, BRS 184, BRS 185, BRS 212, BRS 213, BRS 214, BRS 215, BRS 230, BRS 231, BRS 232, BRS 257, BRS 258, BRS 259, BRS 260, BRS 261, BRS 262 e Embrapa 48) produzidas em Londrina, PR na safra de 2004/2005, semeadas em outubro, novembro e dezembro. As amostras foram trituradas em moínho analítico e analisadas em triplicata. Para a determinação dos teores de óleo e proteína foram utilizadas as metodologias preconizadas pelas Normas Analíticas do Instituto Adolfo Lutz. Os resultados mostraram que os teores de óleo e proteína dos grãos não apresentam diferenças significativas, nas três épocas de semeadura. As cultivares BRS 257 e BRS 259 apresentaram os maiores teores de proteína nas três épocas de semeaduras: 40,2%; 42,2%; 41,4%, e 41,3%, 40,7%, 41,9%, respectivamente em outubro, novembro e dezembro. Os menores teores de proteína foram observados nas cultivares Embrapa 48 e BRS 133 com 36,9%; 37,7%; 36,5%; e 36,1%; 37,8%; e 37,1%, nas três épocas, respectivamente. A cultivar BRS 260 apresentou os maiores teores de óleo, 24,2% (outubro), 25,1% (novembro) e 23,8% (dezembro), enquanto a cultivar BRS 230 apresentou os menores teores de óleo: 20,2%, 20,0% e 20,3%, nas três épocas, respectivamente.
650 $aMelhoramento Genético Vegetal
650 $aSoja
650 $aVariedade
700 1 $aMANDARINO, J. M. G.
700 1 $aCARRÃO-PANIZZI, M. C.
700 1 $aBENASSI, V. T.
773 $tIn: CONGRESSO BRASILEIRO DE SOJA, 4., 2006, Londrina. Resumos... Londrina: Embrapa Soja, 2006.
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