Microbial Fertilizers

Microbial fertilizers, commonly known as “bacterial fertilizers,” are microbial preparations made from beneficial microorganisms isolated from soil and subjected to artificial selection and propagation. They serve as a supplementary fertilizer.
Through the metabolic activities of the microorganisms they contain, these fertilizers increase the supply of plant nutrients in the soil and the growing environment. They also produce plant growth hormones, promote plant growth and development, inhibit the activity of harmful microorganisms, and enhance plants' disease resistance, thereby achieving the goals of increasing crop yields and improving product quality.
The efficacy of microbial fertilizers primarily depends on the quantity and activity of the microorganisms in the formulation. When applied, their effectiveness is also influenced by external environmental factors such as light, temperature, moisture, pH, and organic matter content.
Microbial fertilizers primarily provide beneficial microbial colonies rather than mineral nutrients. They are used in small quantities; typically, 500–1,000 grams of microbial inoculant per mu is sufficient.
Due to limitations in microbial activity, the shelf life of microbial fertilizers is generally 3 months to 1 year. Furthermore, since microorganisms cannot be observed with the naked eye, the quality of microbial fertilizers can only be determined through instrumental analysis.