nutrição de mudas de açaizeiro sob relações cálcio:potássio:sódio em solução nutritiva nutrition of açai seedlings (euterpe oleracea mart.) under different ratios of calcium:potassium: sodium in nutrient solution

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ID: 169758
2004
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Abstract
Objetivando-se estudar diferentes relações entre os cátions cálcio, potássio e sódio na produção de matéria seca e acúmulo de macronutrientes em mudas de açaizeiro (Euterpe oleracea Mart.), realizou-se um experimento em casa-de-vegetação no Departamento de Ciência do Solo da UFLA. Utilizou-se o delineamento estatístico em blocos casualisados com nove tratamentos em quatro repetições. Os tratamentos foram constituídos por nove relações cálcio: potássio: sódio (4:2:1, 3:3:1, 2:4:1, 1:5:1, 5:1:1, 4:1:2, 6:0:1; 0:6:1, e 4:2:0) em solução nutritiva. A unidade experimental constituiu-se de um vaso com capacidade para três litros de solução, contendo duas plantas. Avaliaram-se as seguintes características: produção de matéria seca e o acúmulo dos macronutrientes fósforo, cálcio, potássio, magnésio e enxofre na matéria seca da planta. A relação cálcio:potássio:sódio influenciou todas as características avaliadas; as soluções contendo cálcio, potássio e sódio nas relações 4:2:1 e 3:3:1 resultaram no desenvolvimento de mudas com maior produção de matéria seca e maior acúmulo de nutrientes.
Aiming to evaluate the effects of different ratios of calcium, potassium and sodium cations on the mineral nutrition of açai seedlings (Euterpe oleracea Mart.), a greenhouse experiment was carried out in the Soil Science Department at the Federal University of Lavras-UFLA. The randomized block design, with nine treatments and four replications, was used. The treatments were nine ratios of calcium, potassium and sodium (4:2:1, 3:3:1, 2:4:1, 1:5:1, 5:1:1, 4:1:2, 6:0:1; 0:6:1, e 4:2:0) in the nutrient solution. The experimental unit was a plastic pot with three liters of solution, containing two plants. The total dry matter and nutrient accumulation were evaluated. The relationship calcium:potassium:sodium influenced all the appraised characteristics, and the solutions containing calcium, potassium and sodium in the ratios 4:2:1 and 3:3:1 resulted in seedlings development with larger production of dry matter and larger accumulation of nutrients.
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sousa2004cincianutrio Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Humberto Umbelino de Sousa, José Darlan Ramos, Janice Guedes de Carvalho, Ester Alice Ferreira
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Journal information and software technology
Year 2004
DOI
10.1590/S1413-70542004000100007
URL
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542004000100007
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