Efecto de Trichoderma spp. para el desarrollo y crecimiento de cuatro especies forestales. Ubicado en el vivero Los Yaguales cantón Mejía.

Abstract

The objective of the study was to determine the effect of Trichoderma harzianum and T. longibrachiatum on the development and growth of the forest species Alnus acuminata, Acacia melanoxylon, Cupressus macrocarpa and Eucalyptus globulus. The trial covered the phases of species identification, seed collection, substrate preparation, sleeving, preparation of suspensions of Trichoderma Harzianum and T. longibrachiatum, sowing of Alnus acuminata, Acacia melanoxylon, Cupressus macrocarpa, Eucalyptus globulus, inoculation of Trichoderma harzianum and T. longibrachiatum, irrigation and measurement of the variables, plant height, root length, stem length, number of leaves, number of roots and fresh weight during 108 days. Acacia melanoxylon and Cupressus macrocarpa were the forest species that responded best to the application of Trichoderma harzianum, especially in the variables number of leaves, number of roots, plant height, root length, stem length and fresh weight. On the other hand, the application of Trichoderma longibrachiatum did not have a significant effect on any of the evaluated variables nor on the forest species Alnus acuminata, Acacia melanoxylon, Cupressus macrocarpa and Eucalyptus globulus. The present study demonstrates the potential of fungi of the genus Trichoderma as inducers of plant growth promotion, particularly at the forest nursery level.