This invention discloses a high-humicity microbial
fertilizer and its preparation method, belonging to the field of microbial
fertilizer technology. The method involves adding a mixed carrier, a protective agent, and
fermentation broth to a stirred tank in a specific ratio, followed by shaking and adsorption,
filtration, and
drying with
forced air until the
moisture content of the absorbent resin
powder reaches 30-35%. The
powder is then continuously granulated using a granulator and sieved to obtain
microbial agent granules with a particle size of 2-5 mm. The
microbial agent granules and
sodium humate are mixed at a
mass ratio of 1-2:10 to obtain the high-humicity microbial
fertilizer. The aggregated short fibers, under the
adhesive and physical entanglement effects of the protective agent, increase the internal space of the
microbial agent granules while improving
structural stability, providing a stable growth and
reproduction environment for microorganisms, and improving the long-term storage of the fertilizer and the
survival rate of microorganisms after application. The enlarged microbial agent granules provide support, increasing soil looseness and providing a good respiratory environment for
crop roots.