Evaluación de cuatro sustratos y dos tratamientos pre-germinativos para la reproducción sexual de Jacaranda mimosifolia (Jacaranda) en el vivero de la ESPOCH..

Abstract

The evaluation of four substrates and two pre-germination treatments for the sexual reproduction of Jacaranda mimosifolia (Jacaranda) was carried out in the nursery of the Escuela Superior Politècnica de Chimborazo. The seed of trees with superior trait characteristics was obtained to know the percentage of germination and seedling growth. For that, an experimental design with a factorial structure with 8 treatments and 4 repetitions was applied. In this work, data were recorded on the percentage of germination at 30 and 45 days after planting and plant development; height, neck diameter, number of leaves, at 30, 45 and 60 days after the appearance of the true leaves. For the analysis of variance, the Tukey test with parametric data and the Friedman test with the non-parametric data with a significance level of 5% was used, the analysis was performed using the InfoStat software, as a result of the percentage of emergency taken at 45 and 60 days it was not different between treatments. For the development of plants for the evaluated variables; height, neck diameter, number of leaves, it was found that the best substrate evaluated at 60 days was conformed T2 (Black earth 50% more Clay 25% more Earthworm Humus 25% more pre-germination treatment in cold water 48 hours) resulting in a neck height diameter (NHD) (1.75 mm), height (5.28 cm), number of leaves (7.9 leaves). The treatments evaluated for the germination variable at 30 and 45 days did not show significance. The T2 treatment showed the best results; height, neck diameter, number of leaves. Studies with different organic fertilizers concerning the forest species Jacaranda mimosifolia are recommended to obtain a more solid scientific base in germination and growth.