ANÁLISE VEGETATIVA DA SOJA EM RESPOSTA A INOCULAÇÃO DE BACTÉRIAS HIDROCAPACITADORES SOB DÉFICIT HÍDRICO

Abstract

Soybeans, with the scientific name Glycine max L., are a legume of great economic importance for Brazil, which is the world's main producer and exporter of this cereal. The 2022/2023 soybean harvest reached a record production of 322.8 million tons, while the 2023/2024 harvest is expected to fall to 306.4 million tons, a reduction of 5.08 percent, due to the climate phenomenon “El Niño ”, which caused a delay and decrease in rainfall. Water scarcity has become a growing concern for soybean producers, especially in areas susceptible to extreme weather conditions. To mitigate these effects, a low-cost alternative that has proven to be effective is the association of growth-promoting and water-capacitating microorganisms, such as bacteria of the genus Bacillus spp. Therefore, the objective was to evaluate the effect of inoculation with water-capacitating bacteria on the vegetative development of soybean crops under water deficit. The experiment had four treatments: Inoculated Irrigated Seed, Non-inoculated Irrigated Seed, Inoculated Seed Without Irrigation and Non-inoculated Seed Without Irrigation. The experimental design was in Randomized Blocks with six replications. Root length, number of nodes, number of leaves, number of flowers/knives and plant height were evaluated. The commercial formula containing bacteria (Bacillus aryabhathai, Bacillus circulans and Bacillus haynesii) positively increased the vegetative development of plants by increasing root length, number of nodes, number of flowers/knives, plant height and dry mass of cultivar CZ37B31I2X.