Uso de Trichoderma spp. como bioestimulante de crecimiento de arrayán, eucalipto, higuerón en el vivero de la Espoch.

Abstract

The aim of this research was to study the effect of Trichoderma spp. as a biostimulant for the growth of Myrtle (Myrcianthes halli), Eucalyptus (Eucalyptus globulus) and Higuerón (Aegiphila ferruginea) in the ESPOCH nursery. The study included the identification, description and transplanting of forest species. The nursery phase was carried out under an experimental design of Randomized Complete Blocks Factorial (DBCA) with fifteen treatments and four replicates, factor A, corresponded to the forest species, factor B, to two species of Trichoderma harzianum and Trichoderma longibrachiatum and factor C, to the strains. Three inoculations of the different species of Trichoderma spp. were carried out with a concentration of 1 x 106 cfu/mL. The following variables were evaluated: height (cm), diameter at collar height (mm) at 15, 30, 45, 60 and 75 days after transplanting (dt), number of leaves, root length, fresh mass (g), leaf dry mass and root dry mass (g), the latter were evaluated at 75 days, and finally the Dickson Index (DCI) was calculated. The treatment that presented better results were the Myrtle and Higueron plants inoculated with Trichoderma longibrachiatum strain 1 and 2 respectively, while the Eucalyptus plants presented greater effect with the 2 species of Trichoderma longibrachiatum and harzianum strain 1,2, finding significant differences in the different variables. It is concluded that the inoculation of Trichoderma longibrachiatum presented greater positive effect on the studied variables, in the forest species Eucalyptus, Higueron and Arrayan. It is recommended to carry out other studies of Trichoderma longibrachiatum and Trichoderma harzianum as biostimulant of growth in forest species, where the different variables are measured during 6 months.