Bacillus megaterium
Bacillus megaterium
Bacillus megaterium — Phosphorus-Solubilizing Rhizobacteria
Bacillus megaterium is a Gram-positive bacterium widely distributed in soil, known for its large cell size and robust spore tolerance. It colonizes the rhizosphere, solubilizes fixed soil phosphorus, secretes organic acids, phosphatases, and plant growth regulators, promoting root development and nutrient uptake — a versatile biofertilizer strain.
Mechanisms of Action
P Solubilization
Secretes organic acids and phosphatases to release fixed inorganic and some organic phosphorus, improving P availability for crops under reduced fertilizer input.
Rhizosphere Growth Promotion
Produces auxins and related metabolites that stimulate root hairs and lateral roots, expanding the absorption zone and improving establishment.
Extracellular Enzymes
Secretes proteases, amylases, and other enzymes that participate in rhizosphere organic matter turnover and nutrient cycling.
Rhizosphere Improvement
Occupies beneficial niches near roots and secretes polysaccharides that support aggregate stability and nutrient buffering — complementary to AMF and Trichoderma.
Product Specifications
Application Methods
Base dressing: 500g-1kg per mu, mixed with compost or fine soil, then incorporated by plowing, hole, or band application
Root dip/drench: Dilute 300-500x; drench at transplant or dip roots 5-10 seconds before planting
Potting mix: Incorporate at 1:100-200 into seedling or potting media; mix and use promptly
Top-dress: Apply at root zone during growth or via fertigation; avoid mixing with strongly alkaline pesticides in the same batch
Applicable Crops
Vegetables, fruit trees, flowers, field crops (corn, rice, soybean), economic crops, and protected cultivation — especially soils with high P fixation or where root-zone improvement is needed