Inoculação e coinoculação com diferentes bactérias promotoras do crescimento na cultura de soja

Abstract

Soybean (Glycine max) is of great economic interest worldwide, as it is used in several areas, such as animal feed and products intended for human consumption. The use of plant rowth promoting bacteria (, in addition to being a sustainable and economical technique, has shownpotential to improve nutrient availability, stimulate plant growth and consequently increase soybean productivity. Therefore, the present study aimed to identify which bacteria alone or in association (co-inoculation) bring better results for soybean. The treatments evaluated were: T1 Control; T2 B. japonicum; T3 B. japonicum + Azospirillum brasilense; T4 B. japonicum + Bacillus aryabhatai; T5 B. japonicum + Bacillus subtilis; T6 B. japonicum + Pseudomonas fluorescens; T7 B. japonicum + Azospirillum brasilense + Bacillus aryabhatai; T8 B. japonicum+ Azospirillum brasilense + Bacillus subtilis; T9 B. japonicum + Azospirillum brasilense + Pseudomonas fluorescens. The treatments were based on inoculation and co-inoculation via seeds, in a randomized block design with 9 treatments and 4 replications. Agronomic traits were evaluated for: average plant height; number of pods; number of grains per pod and per soybean plant, and data related to yield: thousand grain weight and production in kg/ha. In conclusion, inoculation of soybean seeds with microorganisms stimulated important agronomic components in the management, with greater efficiency in some analyzed variables, however, there was no significant gain in productivity.