Evaluación de tres tipos de sustrato y tres dosis de auxinas en la propagación de estacas de Bursera graveolens (Kunt) Triana & Planch.

Abstract

This research aimed to asexually propagate Bursera graveolens (Kunt) Triana & Planch (palo santo) in the Dos Mangas agroforestry nursery in the province of Santa Elena, Santa Elena city. A Completely Randomized Block Design was applied with two factors: 1) type of substrate (A1: black earth + rice chaff + river sand, A2: black earth + cattle manure, and A3: black earth + river sand) and 2) doses of Auxins (AIB) (B1: 6,000 ppm, B2: 8,000 ppm, B3: 10,000 ppm and B4: distilled water). 12 treatments were generated with 10 experimental subsamples. An analysis of variance (ANOVA) was performed with separation of means (Tukey test at 5%) for the variables that met the assumptions of normality and homoscedasticity; and nonparametric analysis (Friedman). The variables evaluated were percentage of catch, number, height, and diameter of shoots at 15, 30, 45 and 50 days. Based on the analyzes carried out, no effect of the use of auxin doses was found during the test. The average taking of B. graveolens cuttings was 36.9%, showing the highest percentage of taking in the A3 substrate with 51, 88%. Shoot height at 30 and 45 days of 2.06 and 2.04 cm, respectively. It was concluded that there was no effect on the substrate interaction with auxin (AIB) in the variables studied, an effect of the substrate type factor was observed, where the A3 substrate experienced a higher percentage of establishment and shoot height. It was recommended to extend the time of conducting the experiment to 6 months, to try to observe an effect of AIB on the rooting of B. graveolens cuttings.