Teste de compatibilidade do bradyrhizobium com 24 linhagens de trichoderma na soja (Glycine max)

Abstract

On the global stage, Brazil has assumed the position of leader in soybean production, driven by the use of advanced technologies, such as bioinputs, which have boosted cultivation efficiency. Trichoderma, a group of fungi, demonstrates the ability to contain the growth of harmful agents in the soil, presenting itself as a safe and environmentally friendly alternative. Soybeans play a vital role as a primary source of plant protein, and the symbiotic relationship between Bradyrhizobium and soybeans plays a key role in nitrogen fixation, which significantly contributes to the sustainability and continuity of this crop. The main objective of the study is to investigate the compatibility between Bradyrhizobium japonicum and 24 Trichoderma strains in soybeans, verifying their influence on the formation of nodules and the dry mass of the plants. The experiment was conducted at Embrapa Arroz e Feijão, in Santo Antônio de Goiás-GO, where a test was carried out with soybeans treated with Bradyrhizobium and different Trichoderma strains in cups. Strain 452 stood out by increasing the weight and number of nodules per plant, as well as dry mass. Strain 659 had more nodules, while strain 58 was less effective, with a lower number and weight of nodules per plant. Superior performance of the strains was expected, but the results may be related to inadequate prior sterilization of the soil. This suggests the need to continue studies, improving the sterilization technique to avoid competition between native species and inoculants.