Uso de Trichoderma spp. para el desarrollo y crecimiento de tres especies forestales en la parroquia Juan Montalvo del cantón Latacunga.

Abstract

The aim of this study was to evaluate the effect of four strains of Trichoderma spp. belonging to the species T. harzianum and T. longibrachiatum as growth promoters in three forest species Aliso (Alnus acuminata), Cypress (Cupressus macrocarpa), Cepillo blanco (Callistemon viminalis), this research was developed in the Juan Montalvo parish of the canton Latacunga. The identification and transplanting of forest seedlings was carried out. The experimental design used was a randomized complete block factorial design consisting of 15 treatments with 4 replications. The following variables were evaluated: height (cm), diameter (mm), root length (cm), fresh weight (g), dry weight of the plants (g) and Dickson's index at 15, 30, 45, 60 and 75 days after transplantation. Three applications of the fungal strains were made at a concentration of 6x106 propagules per mL at 30,45 and 60 days on the forest species under study. The results were ratified by recording data, which were tabulated and represented graphically, obtaining higher values using T. harzianum strain 2 in alder, cypress and white brush species in the variables of height, root length, fresh weight, root and foliar dry weight, on the contrary, T. longibrachiatum strain 1 achieved effects in alder and white brush in root and foliar dry weights, while cypress presented effects in the number of leaves. It is concluded that T. harzianum strain 2 and T. longibranchiatum strain 1 showed promotion of growth and development in the study treatments. It is recommended to carry out similar studies with Trichoderma harzianum and Trichoderma longibrachiatum evaluating the effect on growth promotion of forest species for different variables in a longer period of time.