Trichoderma as a growth promoter in Myracrodruon urundeuva Fr. All.

• DOI: 10.22533/at.ed.9733323290310

• Palavras-chave: Forest seedlings. Biostimulant. Native tree.

• Keywords: Forest seedlings. Biostimulant. Native tree.

• Abstract:

  Fungi of the genus Trichoderma are microorganisms capable of enhancing plant growth. These fungi can positively influence the initial growth of Myracrodruon urundeuva Fr. All. (aroeira do sertão), forest species of great economic value. Thus, the objective of this work was to evaluate the efficiency of the inoculation of five Trichoderma isolates, as plant growth promoters with and without phosphorus fertilization in the mastic culture, in a greenhouse, using Cerrado soil as substrate. Two independent experiments were carried out, one with natural phosphate fertilization and the other without fertilization, both inoculated with Trichoderma. Two evaluations were carried out, the first carried out 50 days after sowing (DAS) and the other at 100 DAS. Morphological characteristics such as height, root length, stem diameter, shoot dry mass, root dry mass and total dry mass were evaluated. Dickson's quality index and relative efficiency were also evaluated. For individuals fertilized with natural phosphate there was variation in growth promotion from 25.4 to 925% in relation to the control. The experiment without fertilization showed variation from 26.5 to 425.4% in growth in relation to the control. The results demonstrate the ability of Trichoderma isolates to promote the initial growth of Myracrodruon urundeuva Fr. All. fertilized or not with natural phosphate.