Floral stems longevity of Oncidium baueri kept in preservative solutions
Orchids have been gaining prominence in the cut flower market due to the exoticism and the singular beauty of its flowers. However, techniques which help to keep the floral quality are needed, since the commercial success is tied to the flowers longevity after cut. Thus, the aim of this study was to evaluate preservative solutions on postharvest longevity of Oncidium baueri floral stems. Floral stems, with 60 cm of length and 90% of open flowers were submitted to pretreatment in a pulsing solution, sucrose-based, for 12 and 24 hours, and placed in maintenance solutions containing sucrose and/or Flower®; keeping the control treatment, with distilled water only. These solutions were added with 0.5% of sodium hypochlorite. The evaluation to verify the quality of the flowers was performed daily using a criterion of notes, ranging from 4 to 0. From third day of evaluation, the floral stems submitted to pretreatment with pulsing solution presented statistically lower averages and at the fourth day of evaluation were considered inadequate for marketing. Increased longevity and quality of the flowers can be obtained by keeping the floral stems in distilled water or in maintenance solutions, which are 1% sucrose-based.
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