crescimento e nutrição mineral de mudas de umbuzeiro (spondias tuberosa arr. cam.) submetidas a níveis de salinidade em solução nutritiva growth and mineral nutrition of umbuzeiro seedlings (spondias tuberosa arr. cam.) under salt stress in nutrient solution

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ID: 260536
2004
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Abstract
Para avaliar o crescimento e a nutrição mineral de mudas de umbuzeiro em solução nutritiva com diferentes níveis de NaCl, conduziu-se este experimento em casa-de-vegetação do Departamento de Ciência do Solo da Universidade Federal de Lavras. Adotou-se o delineamento em blocos casualizados com quatro repetições e seis doses de NaCl (0, 20, 40, 60, 80 e 100 mmol L-1). As mudas foram adaptadas na solução de Hoagland a 25%, 33% e 50% da sua força iônica, permanecendo durante 15 dias em cada concentração. Após esse período, conduziram-se as plantas por 60 dias em solução com 100% da força iônica e os tratamentos com NaCl. A troca das soluções foi feita quinzenalmente. O NaCl na solução nutritiva afetou negativamente o crescimento das mudas de umbuzeiro. O umbuzeiro foi classificado como moderadamente tolerante à salinidade quando cultivado em até 31 mmol L-1 de NaCl na solução nutritiva, sendo a compartimentalização nas raízes o possível mecanismo de tolerância à salinidade. A ordem de acumulação dos macronutrientes foi: N > K > Ca > P > S > Mg e N > Ca > K > P > S > Mg, na ausência e com 100 mmol L-1, respectivamente, e a dos micronutrientes, exceto o Cl, foi: Fe > B > Mn > Zn > Cu, independente da concentração de NaCl no meio.
To evaluate the growth and the mineral nutrition of umbuzeiro seedlings, under salt stress, an experiment in nutrient solution was conducted, under greenhouse conditions in the Soil Science Department of the Federal University of Lavras, Brazil. The experimental design was randomized blocs, with four replications and six doses of NaCl (0, 20, 40, 60, 80, and 100 mmol L-1). The seedlings were adapted in the Hoagland solution to 25, 33 and 50% of ionic forces, staying for fifteen days in each concentration. After this period the seedlings were conduced for 60 days in nutrient solution with 100% of the ionic force and the treatments with NaCl. The change of the solutions was made biweekly. The NaCl in the nutrient solution affected negatively the growth of the umbuzeiro seedlings. The umbuzeiro was classified as moderately tolerant to salinity when cultivated below 31 mmol L-1 of NaCl. The roots compartmentalization is the possible mechanism of tolerance to salt in umbuzeiro seedlings. The order of macronutrient accumulation was: N > K > Ca > P > S > Mg and N > Ca > K > P > S > Mg, in the absence and with 100 mmol L-1, respectively and the micronutrient accumulation, except Cl, was: Fe > B > Mn > Zn > Cu, independent of the concentration of NaCl in the solution.
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neves2004cinciacrescimento Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors ;Orlando Sílvio Caires Neves;Janice Guedes de Carvalho;Carlos Ribeiro Rodrigues
Journal information and software technology
Year 2004
DOI
10.1590/S1413-70542004000500005
URL
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542004000500005
Keywords
salinity translocation accumulation sodium chlorineagriculture (general)

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