atividade antioxidante de hibiscus sabdariffa l. em função do espaçamento entre plantas e da adubação orgânica antioxidant activity of hibiscus sabdariffa l. in function of spacing between plants and organic fertilization

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ID: 207464
2011
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Abstract
O objetivo deste trabalho foi avaliar os efeitos do espaçamento entre plantas na linha e da aplicação ou não de cama-de-frango em cobertura no solo, na atividade antioxidante, teor total de fenóis e flavonóides em extrato etanólico e extrato aquoso quente de folhas de rosela (Hibiscus sabdariffa L.). Os tratamentos consistiram de cinco espaçamentos entre plantas (0,30; 0,35; 0,40; 0,45 e 0,50m) e do uso ou não de cama-de-frango em cobertura do solo, na dose de 10t ha-1, arranjados como fatorial 5x2, no delineamento blocos casualizados, com quatro repetições. Os teores de flavonóides e fenóis totais aumentaram no extrato etanólico (18% e 11%, respectivamente) e no extrato aquoso quente (16% e 11%, respectivamente) entre a aplicação ou não de cama-de-frango em cobertura no solo. A atividade antioxidante foi influenciada significativamente pelo método de obtenção dos extratos, sendo no extrato etanólico 263% maior que o resultado obtido para o extrato aquoso quente.
The purpose of this paper was to analyze the effects of plant spacing within rows by means of applying or not applying chicken-manure to the soil cover in the antioxidant activity, total phenolic and flavonoids in ethanolic leaves extract and hot aqueous extract of roselle. The treatments consisted of five different spaces between plants (0.30, 0.35, 0.40, 0.45 and 0.50m) and the use or non-use of chicken litter broadcasted on soil surface at 10 ton ha-1, in a 5x2 factorial arrangement in a randomized block design with four replications. The flavonoids levels and total phenolic increased on ethanolic leaves extract (18% and 11%, respectively) and hot aqueous extract (16% and 11%, respectively) between applying or not applying chicken-manure to the soil cover. Antioxidant activity was significantly influenced by the way of obtaining extracts, being the ethanolic extract 263% higher than the results obtained by the hot aqueous extract.
Reference Key
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Authors ;Diovany Doffinger Ramos;Maria do Carmo Vieira;Anelise Samara Nazari Formagio;Claudia Andrea Lima Cardoso;Dayana Doffinger Ramos;Thiago de Oliveira Carnevali
Journal Trials
Year 2011
DOI
DOI not found
URL
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782011000800006
Keywords
anthocyanins

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