Evaluación de tres dosis de ácido giberélico como promotor de la ruptura de dormancia en semillas de durazno (Prunus persica) var. Diamante, cantón Riobamba, provincia Chimborazo.

Abstract

The objective of this research work was to determine the most adequate dose of gibberellic acid to promote dormancy breaking in peach (Prunus pérsica) var. Diamante seeds. It used a completely randomized experimental design (CWD) with a factorial arrangement (a x b) with 16 treatments and four replications. Factor A was the doses of gibberellic acid, AG1 0 ppm of gibberellic acid, AG2 150 ppm of gibberellic acid, AG3 300 ppm of gibberellic acid, and AG4 450 ppm of gibberellic acid. While factor B was the lunar phases F1 New moon, F2 Crescent quarter; F3 Full moon; F4 Waning quarter. The Tukey test was used at 5% significance. For the execution of the trial, the seeds were submerged for 6 hours in the solutions prepared with each of the doses of gibberellic acid, and sowing was carried out in each of the lunar phases according to the experimental design. The results of the application of 450 ppm of gibberellic acid obtained a higher germination percentage (68.75%), with the application of 150 ppm of gibberellic acid + crescent quarter, the time it took to germinate was different from the other treatments, when using 450 ppm and 300 ppm of gibberellic acid and sown between the new moon and crescent quarter a higher percentage of emergence was also obtained, with the application of 450 ppm of gibberellic acid a greater height of 8.8 cm. was obtained, with the same application and the influence of the waning fourth lunar phase, a greater root length (21.63 cm) was obtained concerning the other treatments. It was concluded that the application of 450 ppm of Gibberellic Acid gives better results. It is recommended to consider the lunar phases at the time of planting.