Selenium-rich compound microbial agent and preparation method thereof

The invention belongs to the technical field of microbial fertilizers, and discloses a selenium-rich compound microbial agent which is prepared from the following raw materials: a compound microbial agent, peptone, yeast powder, a sodium selenite solution, a porous dispersion gel matrix, a porous coating carrier and water. The efficient selenium-rich compound microbial agent is researched and developed by precisely proportioning and fusing the compound microbial agent, the porous dispersion gel matrix, the porous coating carrier and the specific nutrient substances. The microbial inoculum has strong selenium enrichment capability, and can significantly improve the selenium element absorption and utilization efficiency of crops; meanwhile, the soil microbial environment can be effectively improved, and the reproduction and activity of beneficial microorganisms in the soil are promoted. In addition, the selenium-rich compound microbial agent can also generate a synergistic effect with other fertilizers in soil,