On the Negative Impact of Mycorrhiza Application on Maize Plants (Zea mays) Amended with Mineral and Organic Fertilizer

Many studies describe the positive effect of mycorrhiza, but few report on negative effects. Furthermore, there is a research gap mechanisms under which conditions symbiotic mycorrhizal plant interaction or parasitic one predominates. The study was conducted as field experiment over three years to investigate mycorrhiza (Rhizoglomus intraradices) and soil bacteria applications fertile soil. A standard fertilizer (diammonium phosphate) two microgranular fertilizers (mineral organomineral) were applied alone in combination with biostimulants and/or (Bacillus velezensis). application only biostimulant resulted lower yields compared all variants without dry 2015 (p = 0.0241) 2016 0.0003). usage alone, fertilizer, occasional significant differences. raised yield mycorrhiza-treated extent 0.0007) 0.0019). effects this alleviated by simultaneous use bacteria. Treatments organomineral expected promote naturally occurring microbiome more than mineral variants, most negatively affected mycorrhiza. We hypothesize that site already optimal for maize plants, thus successful introduction other microorganisms through tended not be beneficial. present first influence arbuscular gained alleviation impact combined conclude used may have impacts if rich nutrients water limiting factor.