Germination and initial development of Handroanthus chrysotrichus (Mart. ex DC.) Mattos inoculated with Trichoderma harzianum L.

Resumo

The use of bioproducts in agriculture is a reality, and the practice has gained prominence recently for various crops in agriculture and forestry. The goal is to reduce environmental impacts and mitigate restrictive and adverse conditions (biotic and abiotic stresses). This study evaluated the impact of Trichoderma harzianum L. concentrations on the germination and initial development of Handroanthus chrysotrichus (Mart. ex DC.) Mattos. Four concentrations of T. harzianum were used: 2, 4, 8 and 16 x 10⁹ CFU mL-1, with distilled water serving as the control treatment. Four replicates of 50 seeds were used for each treatment. Parameters such as the first germination (%), germination (%), length (cm) of the shoot and root and dry mass (mg) of the shoot and root were evaluated. The results revealed that Trichoderma harzianum, when used at low concentrations (up to 4 x 10⁹ CFU mL-1), are efficient for the germination and initial development of this species. The isolate at 2 x 10⁹ CFU mL-1 showed the best performance in the evaluated variables. Information related to the action of microorganisms in the forestry sector is scarce and requires greater attention, especially regarding dosages.