Efecto de cuatro tipos de sustrato en la propagación sexual de Myrcianthes hallii bajo condiciones de invernadero en el cantón Riobamba, provincia del Chimborazo.

Abstract

This research aimed to compare the effect of four substrate types on the sexual propagation of Myrcianths hallii under greenhouse conditions in order to find a suitable culture medium. This research was carried out in the greenhouse of the College of Natural Resources of the ESPOCH, in Riobamba City, Chimborazo Province. A completely randomized design was established, consisting of four treatments, three repetitions, and 108 individuals. Four substrates made up of: T1 (40% black soil + 30% rice husk + 30% peat), T2 (20% black soil + 40% rice husk + 40% peat), T3 (50% black soil + 20% rice husk + 30% peat), T4 (Black soil 100%) were used. In the field phase, the adequacy of the nursery, elaboration of the substrates, preparation of the vegetative material, and installation of the trial were carried out. The variables evaluated for vegetative development were germination percentage, height, Diameter of Neck Height (DNH), and the number of leaves. For the statistical analysis, the Tukey test at 5% was used in the Minitab software, obtaining results that T3 presented the highest germination with 55.56%. For the best morphological development, it was observed that T1 obtained significant differences in the variables: height (39.67 mm), DNH (1.7 mm), and the number of leaves (5) surpassing the other treatments. In the cost analysis, the treatments that presented profitability were T1, T2 and T3 with 58%, 82 %, and 74%. It was concluded that T1 is the best option for the sexual propagation of Myrcianths hallii due to the quality of the seedlings obtained in the present investigation. It is recommended to carry out similar studies in other sites varying the time and substrates in order to generate knowledge of this species.