Trichoderma efficiency in the maintenance and productivity of soybean plants in producing savanna regions, Tocantins, Brazil

Abstract

Trichoderma is a natural soil fungus that has been extensively studied and used in agricultural production as a biofertilizer and soil inoculant. Thus, the objective of this work was to evaluate the efficiency of Trichoderma in maintenance and productivity of soybean plants in producing savanna regions, Tocantins, Brazil. Experiments were carried out in three regions in the state of Tocantins, Gurupi, Alvorada and Crixas. The experimental design was performed in a randomized block with four replicates. The treatments were composed by the control without inoculation and inoculation of Trichoderma (Trichoderma asperellum) at the dose of 2 kg ha-1. The inoculation of Trichoderma asperellum, strain UFT 201, promoted the initial and final maintenance of plants in all the experiments in the different regions and increased also the productivity in the experiments in Gurupi and Crixas regions. For the experiment in Gurupi, the treatment with Trichoderma inoculation was also higher in relation to control, with production of 2514 kg ha-1, which represented an increase above 34.5%. In Crixas the treatments with the inoculation of Trichoderma presented a production of 3840 kg ha-1, 33% higher than the control that was of 2880 kg ha-1.