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Registro Completo |
Biblioteca(s): |
Embrapa Amapá; Embrapa Amazônia Ocidental; Embrapa Amazônia Oriental; Embrapa Rondônia; Embrapa Roraima. |
Data corrente: |
27/06/2019 |
Data da última atualização: |
11/11/2019 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Autoria: |
SILVA JÚNIOR, E. C. da; MARTINS, G. C.; WADT, L. H. de O.; SILVA, K. E. da; LIMA, R. M. B. de; BATISTA, K. D.; GUEDES, M. C.; OLIVEIRA JUNIOR, R. C. de; REIS, A. R.; LOPES, G.; MENEZES, M. D. de; BROADLEY, M. R.; YOUNG, S. D.; GUILHERME, L. R. G. |
Afiliação: |
LUCIA HELENA DE OLIVEIRA WADT, CPAF-RO; KATIA EMIDIO DA SILVA, CPAA; ROBERVAL MONTEIRO BEZERRA DE LIMA, CPAA; KARINE DIAS BATISTA, CPAF-RR; MARCELINO CARNEIRO GUEDES, CPAF-AP; RAIMUNDO COSME DE OLIVEIRA JUNIOR, CPATU. |
Título: |
Natural variation of arsenic fractions in soils of the Brazilian Amazon. |
Ano de publicação: |
2019 |
Fonte/Imprenta: |
Science of the Total Environment,v. 687, p. 1219-1231, 2019. |
Idioma: |
Inglês Português |
Conteúdo: |
Arsenic (As) in native soils of the Amazon rainforest is a concern due to its likely origin from the Andean rivers, which transport loads of sediments containing substantial amounts of trace elements coming from the cordilleras. Yet, unveiling soil As baseline concentrations in the Amazon basin is still a need because most studies in Brazil have been performed in areas with predominantly high concentrations and cannot express a real baseline value for the region. In this study, 414 soil samples (0?20, 20?40 and 40?60 cm layers) were collected from different sites throughout the Amazon basin - including native Amazon rainforest and minimally disturbed areas - and used to determine total and extractable (soluble + available) As concentrations along with relevant soil physicochemical properties. Descriptive statistics of the data was performed and Pearson correlation supported by a Principal Component Analysis (PCA) provided an improved understanding ofwhere and howAs concentrations are influenced by soil attributes. Total As concentration ranged from0.98 to 41.71 mgkg?1 with values usually increasing from the topsoil (0?20 cm) to the deepest layer (40?60 cm) in all sites studied. Considering the proportional contribution given by each fraction (soluble and available) on extractable As concentration, it is noticeable that KH2PO4-extractable As represents themost important fraction,with N70% of the As extracted on average in all the sites studied. Still, the extractable fractions (soluble+available) correspond to ~0.24% of the total As, on average. Total, available, and soluble As fractions were strongly and positively correlated with soil Al3+.
The PCA indicated that soil pH in combination with CEC might be the key factors controlling soil As concentrations and the occurrence of each arsenic fraction in the soil layers. MenosArsenic (As) in native soils of the Amazon rainforest is a concern due to its likely origin from the Andean rivers, which transport loads of sediments containing substantial amounts of trace elements coming from the cordilleras. Yet, unveiling soil As baseline concentrations in the Amazon basin is still a need because most studies in Brazil have been performed in areas with predominantly high concentrations and cannot express a real baseline value for the region. In this study, 414 soil samples (0?20, 20?40 and 40?60 cm layers) were collected from different sites throughout the Amazon basin - including native Amazon rainforest and minimally disturbed areas - and used to determine total and extractable (soluble + available) As concentrations along with relevant soil physicochemical properties. Descriptive statistics of the data was performed and Pearson correlation supported by a Principal Component Analysis (PCA) provided an improved understanding ofwhere and howAs concentrations are influenced by soil attributes. Total As concentration ranged from0.98 to 41.71 mgkg?1 with values usually increasing from the topsoil (0?20 cm) to the deepest layer (40?60 cm) in all sites studied. Considering the proportional contribution given by each fraction (soluble and available) on extractable As concentration, it is noticeable that KH2PO4-extractable As represents themost important fraction,with N70% of the As extracted on average in all the sites studied. Still, the extractable fraction... Mostrar Tudo |
Palavras-Chave: |
Carcinogenic. |
Thesagro: |
Arsênico. |
Thesaurus Nal: |
Amazonia; Arsenic. |
Categoria do assunto: |
-- K Ciência Florestal e Produtos de Origem Vegetal |
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/198874/1/arsenio-ediu-2019.pdf
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Marc: |
LEADER 02760naa a2200325 a 4500 001 2110118 005 2019-11-11 008 2019 bl uuuu u00u1 u #d 100 1 $aSILVA JÚNIOR, E. C. da 245 $aNatural variation of arsenic fractions in soils of the Brazilian Amazon.$h[electronic resource] 260 $c2019 520 $aArsenic (As) in native soils of the Amazon rainforest is a concern due to its likely origin from the Andean rivers, which transport loads of sediments containing substantial amounts of trace elements coming from the cordilleras. Yet, unveiling soil As baseline concentrations in the Amazon basin is still a need because most studies in Brazil have been performed in areas with predominantly high concentrations and cannot express a real baseline value for the region. In this study, 414 soil samples (0?20, 20?40 and 40?60 cm layers) were collected from different sites throughout the Amazon basin - including native Amazon rainforest and minimally disturbed areas - and used to determine total and extractable (soluble + available) As concentrations along with relevant soil physicochemical properties. Descriptive statistics of the data was performed and Pearson correlation supported by a Principal Component Analysis (PCA) provided an improved understanding ofwhere and howAs concentrations are influenced by soil attributes. Total As concentration ranged from0.98 to 41.71 mgkg?1 with values usually increasing from the topsoil (0?20 cm) to the deepest layer (40?60 cm) in all sites studied. Considering the proportional contribution given by each fraction (soluble and available) on extractable As concentration, it is noticeable that KH2PO4-extractable As represents themost important fraction,with N70% of the As extracted on average in all the sites studied. Still, the extractable fractions (soluble+available) correspond to ~0.24% of the total As, on average. Total, available, and soluble As fractions were strongly and positively correlated with soil Al3+. The PCA indicated that soil pH in combination with CEC might be the key factors controlling soil As concentrations and the occurrence of each arsenic fraction in the soil layers. 650 $aAmazonia 650 $aArsenic 650 $aArsênico 653 $aCarcinogenic 700 1 $aMARTINS, G. C. 700 1 $aWADT, L. H. de O. 700 1 $aSILVA, K. E. da 700 1 $aLIMA, R. M. B. de 700 1 $aBATISTA, K. D. 700 1 $aGUEDES, M. C. 700 1 $aOLIVEIRA JUNIOR, R. C. de 700 1 $aREIS, A. R. 700 1 $aLOPES, G. 700 1 $aMENEZES, M. D. de 700 1 $aBROADLEY, M. R. 700 1 $aYOUNG, S. D. 700 1 $aGUILHERME, L. R. G. 773 $tScience of the Total Environment,v. 687, p. 1219-1231, 2019.
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Embrapa Rondônia (CPAF-RO) |
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Biblioteca(s): |
Embrapa Uva e Vinho. |
Data corrente: |
07/10/2014 |
Data da última atualização: |
06/09/2023 |
Tipo da produção científica: |
Resumo em Anais de Congresso |
Autoria: |
SAVINI, T. C.; CONCEIÇÃO, M. A. F.; SANTOS, C. P. dos; SOUZA, R. T. de. |
Afiliação: |
MARCO ANTONIO FONSECA CONCEICAO, CNPUV; REGINALDO TEODORO DE SOUZA, CNPUV. |
Título: |
Efeito da suspensão da irrigação sobre a incidência de requeima na cultivar de videira Niágara Rosada. |
Ano de publicação: |
2014 |
Fonte/Imprenta: |
In: ENCONTRO DE INICIAÇÃO CIENTÍFICA DA EMBRAPA UVA E VINHO, 12., ENCONTRO DE PÓS-GRADUANDOS DA EMBRAPA UVA E VINHO, 8., 2014, Bento Gonçalves. Resumos... Bento Gonçalves: Embrapa Uva e Vinho, 2014. |
Páginas: |
p. 56 |
Idioma: |
Português |
Conteúdo: |
O objetivo deste trabalho é avaliar o efeito da suspensão da irrigação, em diferentes épocas da maturação dos frutos, sobre a ocorrência da requeima das folhas da videira 'Niágara Rosada'. |
Palavras-Chave: |
Anais; CNPUV; IC; Iniciação cientifica; Niágara Rosada; Uvas do Brasil. |
Thesagro: |
Deficiência hídrica; Irrigação; Requeima; Viticultura; Vitis labrusca. |
Categoria do assunto: |
-- |
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/110257/1/anais-IC-2014.58.pdf
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Marc: |
LEADER 01174nam a2200289 a 4500 001 1996722 005 2023-09-06 008 2014 bl uuuu u00u1 u #d 100 1 $aSAVINI, T. C. 245 $aEfeito da suspensão da irrigação sobre a incidência de requeima na cultivar de videira Niágara Rosada.$h[electronic resource] 260 $aIn: ENCONTRO DE INICIAÇÃO CIENTÍFICA DA EMBRAPA UVA E VINHO, 12., ENCONTRO DE PÓS-GRADUANDOS DA EMBRAPA UVA E VINHO, 8., 2014, Bento Gonçalves. Resumos... Bento Gonçalves: Embrapa Uva e Vinho$c2014 300 $ap. 56 520 $aO objetivo deste trabalho é avaliar o efeito da suspensão da irrigação, em diferentes épocas da maturação dos frutos, sobre a ocorrência da requeima das folhas da videira 'Niágara Rosada'. 650 $aDeficiência hídrica 650 $aIrrigação 650 $aRequeima 650 $aViticultura 650 $aVitis labrusca 653 $aAnais 653 $aCNPUV 653 $aIC 653 $aIniciação cientifica 653 $aNiágara Rosada 653 $aUvas do Brasil 700 1 $aCONCEIÇÃO, M. A. F. 700 1 $aSANTOS, C. P. dos 700 1 $aSOUZA, R. T. de
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