Bacillus subtilis forms a probiotic environment in the soil, promotes the formation of agglomerates, improves soil fertility and water retention, increases soil porosity, and promotes root growth. Specifically, it accelerates the mineralization of nutrients and changes nutrients from ineffective and slow-acting states to effective and fast-acting states. At the same time, it accelerates the humification of nutrients, secretes phytase, degrades most of the phytate in the soil; produces auxin, stimulates the growth of crops, and improves the survival rate and emergence rate of seeds.
Bacillus subtilis is widely used in biological fertilizers. When applied to crops or soil, it can colonize in the rhizosphere or in vivo of crops, and has a specific fertilizer effect.