Influence of microbial fertilizers from the Microbtima group on the germination of corn hybrid Kneja 310

In recent years, there has been an increase in the world market of plant protection agents of a microbial nature and those that improve the health status of plants. Several biological agents (bacterial and fungal insecticides, plant biostimulators containing mycorrhizae or bacteria and fertilizers with amino acids) from different companies are registered in Bulgaria. All this became possible both because of scientific progress and because of the adopted "European Green Pact" and the inflated prices of mineral fertilizers. Accelerated implementation of the technology is also needed. The aim of the present study was to evaluate the effect of several microbial agents from the Microbtima group on the germination percentage, root and coleoptile length in the test crop maize. The germination rate of hybrid Kneja 310 seeds recorded on the 7th day was 100 % for all variants, but a difference was observed in the vitality index, root length (cm) and coleoptile (cm). It has been confirmed that the rhizosphere soil bacteria in the agents have a beneficial effect on the initial stage of plant development