Análise de compatibilidade entre inoculantes e micronutrientes

Abstract

The present study aimed to evaluate the compatibility between inoculants and micronutrients used in soybean cultivation, seeking alternatives to improve agricultural management and promote sustainability. The research was motivated by the increasing adoption of technologies such as in-furrow directed spray application, which combines biological inoculants and micronutrients in the same application tank, despite potential incompatibility issues between chemical and biological inputs. The methodology included compatibility tests between inoculants based on Bradyrhizobium japonicum and Azospirillum brasilense mixed with micronutrients such as cobalt (Co), molybdenum (Mo), nickel (Ni), and boron (B), in addition to determining the pH of the products used. The tests were conducted in vitro at the Biological Control Laboratory of the Federal University of Technology – Paraná (UTFPR), Dois Vizinhos Campus, using serial dilution and Colony Forming Unit (CFU) counting techniques. The results showed no significant reduction in the cellular viability of the microorganisms after exposure to the micronutrients, indicating no negative effect on bacterial survival. The observed pH values remained, for the most part, within the range considered favorable for the development of the evaluated bacteria. Therefore, compatibility between the inoculants and micronutrients in the tested commercial formulations was demonstrated, suggesting their potential for joint application in soybean crop management.