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- Title
Growth, relative chlorophyll content and concentration of inorganic solutes in sunflowers plants supplemented with marine macroalgae organic residue.
- Authors
de Brito, Paulo Ovídio Batista; Gondim, Franklin Aragão; Martins, Kaio; Barbosa, Rifandreo Monteiro; de Arruda, Julyanne Fonteles; de Macedo Carneiro, Pedro Bastos
- Abstract
One effect of the tidal dynamics is the accumulation during of large volumes of macroalgae the low tide, named "arribadas algae". The objective of this work was to analyze the effects of using arribada alga eorganic residues (AAOR) on the initial growth of sunflower plants, where the following were evaluated: plant growth, relative chlorophyll content and inorganic solids content (Na, K, Cl and NO3). The algae were collected on Praia do Pacheco in Caucaia, state of Ceará, Brazil, washed in running water and placed to dry in the sun for seven days, then dried in a forced circulation oven at 80 °C and crushed. The sunflower seeds were sown in 5 L plastic buckets, containing: 1) 100% (in volume) of sand; 2) sand + 100% of nitrogen recommendation - NR in commercial fertilizer (80 kg of N.ha-1); 3) sand + 50% of the NR in macroalgae; 4) sand + 100% of NR in macroalgae; and 5) sand + 150% of the NR in macroalgae. The use of AAOR improved the growth of the analyzed variables in relation to the plants grown in substrate with sand or sand + fertilizer. The best results were observed at 50% of the NR in AAOR. The addition of increasing concentrations of AAOR allowed a greater accumulation of beneficial ions such as K and NO-3 while no significant differences were observed for toxic ions such as Na and Cl in relation to plants supplemented with fertilizer or sand. The use of AAOR in substrates can be an alternative to fertilizers in plant cultivation since it reduces production costs besides being a sustainable destination.
- Subjects
BRAZIL; CHLOROPHYLL analysis; SUNFLOWERS; MARINE algae; INORGANIC chemistry; PLANT growth; AGRICULTURE
- Publication
Revista Ceres, 2018, Vol 65, Issue 5, p395
- ISSN
0034-737X
- Publication type
Article
- DOI
10.1590/0034-737X201865050003