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Registro Completo |
Biblioteca(s): |
Embrapa Hortaliças. |
Data corrente: |
30/11/1993 |
Data da última atualização: |
30/11/1993 |
Autoria: |
OLIVEIRA, J. A.; MACHADO, J. da C.; VIEIRA, M. das G. G. C. |
Afiliação: |
ESAL - Lavras, MG. |
Título: |
Efeito do tratamento fungicida sobre o desempenho de sementes de pepino (Cucumis sativus L.) e pimentao (Capsicum annuum L.). |
Ano de publicação: |
1992 |
Fonte/Imprenta: |
Ciencia e Pratica, Lavras, v.16, n.2, p.42-47, 1992. |
ISSN: |
0100-3267 |
Idioma: |
Português |
Palavras-Chave: |
Cucumber; Fungicide; Sweet pepper. |
Thesaurus Nal: |
seeds. |
Categoria do assunto: |
-- |
Marc: |
LEADER 00588naa a2200193 a 4500 001 1750803 005 1993-11-30 008 1992 bl uuuu u00u1 u #d 022 $a0100-3267 100 1 $aOLIVEIRA, J. A. 245 $aEfeito do tratamento fungicida sobre o desempenho de sementes de pepino (Cucumis sativus L.) e pimentao (Capsicum annuum L.). 260 $c1992 650 $aseeds 653 $aCucumber 653 $aFungicide 653 $aSweet pepper 700 1 $aMACHADO, J. da C. 700 1 $aVIEIRA, M. das G. G. C. 773 $tCiencia e Pratica, Lavras$gv.16, n.2, p.42-47, 1992.
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Embrapa Hortaliças (CNPH) |
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| Acesso ao texto completo restrito à biblioteca da Embrapa Mandioca e Fruticultura. Para informações adicionais entre em contato com cnpmf.biblioteca@embrapa.br. |
Registro Completo
Biblioteca(s): |
Embrapa Mandioca e Fruticultura. |
Data corrente: |
04/03/2008 |
Data da última atualização: |
05/03/2008 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Circulação/Nível: |
Internacional - B |
Autoria: |
MELO, E. E. C. de; NASCIMENTO, C. W. A. do; ACCIOLY, A. M. A.; SANTOS, A. C. Q. |
Afiliação: |
Évio Eduardo Chaves de Melo, UFRPE; Clístenes Williams Araújo do Nascimento, UFRPE; Adriana Maria Aguiar Accioly, CNPMF; Ana Cristiane Queiroz SAntos, UFRPE. |
Título: |
Phytoextraction and fractionation of heavy metals in soil after multiple applications of natural chelants. |
Ano de publicação: |
2008 |
Fonte/Imprenta: |
Scientia Agricola, Piracicaba, v. 65, n. 1, p. 61-68, 2008. |
ISSN: |
0103-9016 |
Idioma: |
Inglês |
Notas: |
doi: 10.1590/S0103-90162008000100009 |
Conteúdo: |
Chelate-assisted phytoextraction of heavy metals is a promising approach to clean up polluted soils. However, the most successful chelants tested so far are synthetic agents that barely degrade in soil, increasing the metal leaching risks. Natural organic acids have been proposed to enhance phytoextraction due to their higher biodegradability, but they can also be a drawback for efficient phytoextraction. This work was carried out to compare the effectiveness of multiple applications of citric and gallic acids on the availability in soil and accumulation of Cd, Pb, Cu, and Zn by velvet bean (Stizolobium aterrimum) plants. The organic acids were added as follows: 5 mmol kg-1 in the 28th cultivation day; two doses of 5 mmol kg-1 at the 28th and 31st day; and three applications at the same rate at the 28th, 31st, and 34th day of velvet bean cultivation. Soil samples were sequentially extracted and soil solution metal concentrations assessed. Neither citric acid nor gallic acid was efficient for metals phytoextraction. In general, low molecular weight organic acids (LMWOA) application increased the metal concentrations in the water soluble and exchangeable fractions. Zinc and Cu were retained mostly in the organic matter fraction. Zn was remobilized from the organic matter fraction through LMWOA application into the water soluble and exchangeable fractions. LMWOA mobilized Pb and Cu from iron oxides, but such an increase in solubility was not high enough to affect phytoextraction. MenosChelate-assisted phytoextraction of heavy metals is a promising approach to clean up polluted soils. However, the most successful chelants tested so far are synthetic agents that barely degrade in soil, increasing the metal leaching risks. Natural organic acids have been proposed to enhance phytoextraction due to their higher biodegradability, but they can also be a drawback for efficient phytoextraction. This work was carried out to compare the effectiveness of multiple applications of citric and gallic acids on the availability in soil and accumulation of Cd, Pb, Cu, and Zn by velvet bean (Stizolobium aterrimum) plants. The organic acids were added as follows: 5 mmol kg-1 in the 28th cultivation day; two doses of 5 mmol kg-1 at the 28th and 31st day; and three applications at the same rate at the 28th, 31st, and 34th day of velvet bean cultivation. Soil samples were sequentially extracted and soil solution metal concentrations assessed. Neither citric acid nor gallic acid was efficient for metals phytoextraction. In general, low molecular weight organic acids (LMWOA) application increased the metal concentrations in the water soluble and exchangeable fractions. Zinc and Cu were retained mostly in the organic matter fraction. Zn was remobilized from the organic matter fraction through LMWOA application into the water soluble and exchangeable fractions. LMWOA mobilized Pb and Cu from iron oxides, but such an increase in solubility was not high enough to affect phytoextractio... Mostrar Tudo |
Thesagro: |
Metal; Solo. |
Thesaurus NAL: |
pollution. |
Categoria do assunto: |
-- |
Marc: |
LEADER 02149naa a2200217 a 4500 001 1654832 005 2008-03-05 008 2008 bl --- 0-- u #d 022 $a0103-9016 100 1 $aMELO, E. E. C. de 245 $aPhytoextraction and fractionation of heavy metals in soil after multiple applications of natural chelants. 260 $c2008 500 $adoi: 10.1590/S0103-90162008000100009 520 $aChelate-assisted phytoextraction of heavy metals is a promising approach to clean up polluted soils. However, the most successful chelants tested so far are synthetic agents that barely degrade in soil, increasing the metal leaching risks. Natural organic acids have been proposed to enhance phytoextraction due to their higher biodegradability, but they can also be a drawback for efficient phytoextraction. This work was carried out to compare the effectiveness of multiple applications of citric and gallic acids on the availability in soil and accumulation of Cd, Pb, Cu, and Zn by velvet bean (Stizolobium aterrimum) plants. The organic acids were added as follows: 5 mmol kg-1 in the 28th cultivation day; two doses of 5 mmol kg-1 at the 28th and 31st day; and three applications at the same rate at the 28th, 31st, and 34th day of velvet bean cultivation. Soil samples were sequentially extracted and soil solution metal concentrations assessed. Neither citric acid nor gallic acid was efficient for metals phytoextraction. In general, low molecular weight organic acids (LMWOA) application increased the metal concentrations in the water soluble and exchangeable fractions. Zinc and Cu were retained mostly in the organic matter fraction. Zn was remobilized from the organic matter fraction through LMWOA application into the water soluble and exchangeable fractions. LMWOA mobilized Pb and Cu from iron oxides, but such an increase in solubility was not high enough to affect phytoextraction. 650 $apollution 650 $aMetal 650 $aSolo 700 1 $aNASCIMENTO, C. W. A. do 700 1 $aACCIOLY, A. M. A. 700 1 $aSANTOS, A. C. Q. 773 $tScientia Agricola, Piracicaba$gv. 65, n. 1, p. 61-68, 2008.
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