Influência do período de aplicação pré colheita de ácido salicílico na qualidade pós-colheita de alface

Abstract

Lettuce is a very consumed vegetable in Brazil and in the world, always present in daily meals and quick snacks. Based on this, some elicitors and products are being used to preserve quality, such as salicylic acid, which can be considered an alternative with good potential for controlling post-harvest losses. In this sense, the objective of this work is to evaluate the effect of different concentrations of salicylic acid applied in different pre-harvest periods on the post-harvest quality of lettuce post-harvest. The experiment will be carried out in the field, in the experimental didactic area of the UFFS campus Chapecó. The experimental design to be used is Completely Randomized, with a salicylic acid concentration of 90 mM, which will be applied at 15, 7, 3,1 and 0 (control, no application) days before harvesting. They are soluble solids, total acidity, pH and mass loss.The results will be excluded from the analysis of variance and regression in the Sisvar program. The application of AS, at a concentration of 90mM, from 0 to 15 days before harvest, in lettuce plants of the Veneranda cultivar, under the conditions in which this research was carried out, does not alter the pH of the leaves and the loss of fresh mass, however, increases the titratable acidity and soluble solids content, when applied 15 and 3 days before harvesting, respectively.