The role of silica in fertilizer anti caking agents

The role of silica in fertilizer anti caking agents mainly includes preventing clumping, improving fertilizer utilization efficiency, and enhancing soil quality. ‌

Firstly, the main function of silica as an anti caking agent in fertilizers is to prevent fertilizer clumping. Fertilizers are prone to clumping due to moisture absorption during storage and transportation, which affects their fluidity and effectiveness. Silicon dioxide has strong adsorption properties and dispersibility, which can adsorb moisture from the air, keep fertilizers dry, and prevent clumping. In addition, the tiny particles of silica can form physical isolation between fertilizer particles, further preventing fertilizer from getting wet and clumping.

Secondly, silicon dioxide can also improve the utilization rate of fertilizers. Gas phase silica has strong physical adsorption function, which can bring a certain slow-release effect, improve the utilization rate of fertilizers, and make the soil have a certain fertilizer retention capacity. Adding gas-phase silica to liquid water-soluble fertilizers can not only act as a suspension agent and anti settling agent, but also improve soil compaction, loosen soil, and thus improve soil quality.

Finally, silica also has a positive impact on plant growth. Research has shown that adding a small amount of nano silica to plant seeds can increase the germination rate of plants and promote their growth. In addition, the primary particle size of fumed silica is around 7-22 nanometers, and adding it to soil can increase the silicon content in the soil, which may be beneficial for plant growth.

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