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Registro Completo |
Biblioteca(s): |
Embrapa Solos. |
Data corrente: |
16/09/2021 |
Data da última atualização: |
16/09/2021 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Autoria: |
CALEGARI, M. R.; MADELLA, M.; VIDAL-TORRADO, P.; PESSENDA, L. C. R.; MARQUES, F. A. |
Afiliação: |
MARCIA R. CALEGARI, UNIOESTE; MARCO MADELLA, Spanish National Research Council; PABLO VIDAL-TORRADO, ESALQ; LUIZ CARLOS R. PESSENDA, CENA; FLAVIO ADRIANO MARQUES, CNPS. |
Título: |
Combining phytoliths and delta13C matter in Holocene palaeoenvironmental studies of tropical soils: an example of an Oxisol in Brazil. |
Ano de publicação: |
2013 |
Fonte/Imprenta: |
Quaternary International, v. 287, p. 47-55, Feb. 2013. |
DOI: |
https://doi.org/10.1016/j.quaint.2011.11.012 |
Idioma: |
Inglês |
Conteúdo: |
Many plants deposit the soluble silica absorbed from the soil as monosilicic acid (H4SiO4) in and between their cells, generating bodies of opal silica (SiO2·nH2O) called phytoliths. Although phytoliths are susceptible to dissolution under extreme pH conditions, they generally do remain in the soil for long periods of time and can help in the reconstruction of past vegetation and climates. In the present study, phytolith analysis was used to reconstruct the palaeoenvironmental conditions that contributed to the pedogenetic processes, the deposition of organic matter and its stabilization in a very thick (>1 m) umbric epipedon of a Humic Hapludox profile from Minas Gerais State (Brazil). The results from the phytolith assemblages were also compared to the fractions and isotopic data of soil carbon of the same profile. The result from studying these two palaeoenvironmental proxies together has shown that the environment under which the umbric epipedon was formed was a mixture of vegetation with predominance of C3 plants in mesothermic conditions and with little variation in humidity since Middle Holocene. |
Palavras-Chave: |
Fitólitos. |
Thesaurus Nal: |
Forests; Isotopes; Phytoliths. |
Categoria do assunto: |
P Recursos Naturais, Ciências Ambientais e da Terra |
Marc: |
LEADER 01857naa a2200229 a 4500 001 2134499 005 2021-09-16 008 2013 bl uuuu u00u1 u #d 024 7 $ahttps://doi.org/10.1016/j.quaint.2011.11.012$2DOI 100 1 $aCALEGARI, M. R. 245 $aCombining phytoliths and delta13C matter in Holocene palaeoenvironmental studies of tropical soils$ban example of an Oxisol in Brazil.$h[electronic resource] 260 $c2013 520 $aMany plants deposit the soluble silica absorbed from the soil as monosilicic acid (H4SiO4) in and between their cells, generating bodies of opal silica (SiO2·nH2O) called phytoliths. Although phytoliths are susceptible to dissolution under extreme pH conditions, they generally do remain in the soil for long periods of time and can help in the reconstruction of past vegetation and climates. In the present study, phytolith analysis was used to reconstruct the palaeoenvironmental conditions that contributed to the pedogenetic processes, the deposition of organic matter and its stabilization in a very thick (>1 m) umbric epipedon of a Humic Hapludox profile from Minas Gerais State (Brazil). The results from the phytolith assemblages were also compared to the fractions and isotopic data of soil carbon of the same profile. The result from studying these two palaeoenvironmental proxies together has shown that the environment under which the umbric epipedon was formed was a mixture of vegetation with predominance of C3 plants in mesothermic conditions and with little variation in humidity since Middle Holocene. 650 $aForests 650 $aIsotopes 650 $aPhytoliths 653 $aFitólitos 700 1 $aMADELLA, M. 700 1 $aVIDAL-TORRADO, P. 700 1 $aPESSENDA, L. C. R. 700 1 $aMARQUES, F. A. 773 $tQuaternary International$gv. 287, p. 47-55, Feb. 2013.
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Embrapa Solos (CNPS) |
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Biblioteca(s): |
Embrapa Clima Temperado. |
Data corrente: |
11/11/2019 |
Data da última atualização: |
12/11/2019 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Circulação/Nível: |
B - 4 |
Autoria: |
DE MARCO, R.; MARTINS, C. R.; HERTER, F. G.; FRONZA, D. |
Afiliação: |
RUDINEI DE MARCO; CARLOS ROBERTO MARTINS, CPACT; FLAVIO GILBERTO HERTER, UFPEL; DINIZ FRONZA, UFSM. |
Título: |
Irrigação: a diferença na produção e qualidade da noz-pecã. |
Ano de publicação: |
2019 |
Fonte/Imprenta: |
Campo & Negócios, Hortifruti, p. 58, out. 2019. Informe Técnico. |
Idioma: |
Português |
Thesagro: |
Noz Peca. |
Categoria do assunto: |
-- |
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/204513/1/Irrigacao-a-diferenca-na-producao-e-na-qualidade.pdf
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Marc: |
LEADER 00473naa a2200157 a 4500 001 2114163 005 2019-11-12 008 2019 bl uuuu u00u1 u #d 100 1 $aDE MARCO, R. 245 $aIrrigação$ba diferença na produção e qualidade da noz-pecã.$h[electronic resource] 260 $c2019 650 $aNoz Peca 700 1 $aMARTINS, C. R. 700 1 $aHERTER, F. G. 700 1 $aFRONZA, D. 773 $tCampo & Negócios, Hortifruti, p. 58, out. 2019. Informe Técnico.
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