Evaluación de enraizamiento de esquejes de hojas de Caesalpinia spinosa (guarango) con tres dosis de ácido naftalenacético en el vivero de la ESPOCH.

Abstract

The purpose of this research was to evaluate the rooting of Caesalpinia spinosa leaf cuttings with doses of naphthaleneacetic acid (NAA). Two trials were conducted, the first one used leaf cuttings from 6-year-old trees and the second trial used leaf cuttings from 9 month old seedlings, in both trials hormone doses were applied and planted in substrate (45% peat, 45% humus and 10% husk). A randomized complete block design was used with 3 replications, where 3 treatments plus a control were evaluated. Results obtained in trial one: None of the cuttings evaluated showed rooting. The results for trial two: An average temperature of 19.91°C and a relative average humidity of 85.1% were recorded. The best percentage of rooting was the treatment T1 (NAA 15 g/250 ml of distilled water), with a value of 92.60%. For the variable number of shoots, treatment T1 (NAA 15 g/250 ml of distilled water) and treatment T3 (NAA 1 milligram powder) registered the highest value of 0.93 root shoots. In the variable number of roots per cuttings the treatment T1 (NAA 15 gr/250 ml of distilled water), obtained a value of 2.81 roots. For the variable root length there was no significance. It was concluded that in trial one, the cuttings of 6- year-old trees treated with NAA did not show results; on the other hand, trial two with seedling cuttings showed that the dose of NAA 15 g/250 ml of distilled water produced the best results in the evaluated variables. It is recommended in future propagation studies of Caesalpinia spinosa to use doses equal to or less than 15 grams of NAA in 250 milliliters of distilled water since it presented good results.