SKB – PSB (Phosphate Solubilizing Bacteria): Advanced Biofertilizer for Enhanced Phosphorus Availability
SKB – PSB (Phosphate Solubilizing Bacteria) is a highly effective microbial biofertilizer designed to improve phosphorus availability in soil. Phosphorus is one of the most essential nutrients for plant growth, but a large portion of soil phosphorus remains locked in insoluble forms that plants cannot absorb. PSB contains beneficial microorganisms that convert insoluble phosphate compounds into soluble forms, making them easily available to plant roots.
Scientific research shows that PSB strains such as Bacillus megaterium, Pseudomonas striata, and other phosphate-solubilizing bacteria release organic acids and enzymes that break down fixed phosphorus compounds in soil. This biological process increases nutrient uptake, promotes stronger root development, and enhances crop productivity. By improving nutrient use efficiency, PSB reduces the dependence on chemical phosphorus fertilizers and supports sustainable agriculture.
SKB – PSB also improves soil health by enhancing microbial activity in the rhizosphere. When applied to seeds, soil, or seedlings, these beneficial bacteria colonize plant roots and continuously supply available phosphorus throughout the crop growth cycle. This results in better flowering, improved fruit setting, and higher yields across multiple crops.
SKB – PSB Product Overview
| Feature | Details |
|---|---|
| Product Name | SKB – PSB |
| Category | Biofertilizer |
| Type | Phosphate Solubilizing Bacteria |
| Microbial Strain | Bacillus spp., Pseudomonas spp. (PSB Culture) |
| Formulation | Liquid / Carrier Based Biofertilizer |
| Mode of Action | Converts insoluble phosphate into soluble forms available to plants |
| Target Use | Improves phosphorus uptake and soil fertility |
| Compatibility | Can be used with most organic manures and biofertilizers |
SKB – PSB Features and Benefits
Improves Phosphorus Availability
PSB microorganisms release organic acids that dissolve fixed phosphates in soil, converting them into forms that plants can easily absorb.
Enhances Root Development
Better phosphorus availability promotes deeper and stronger root systems, improving nutrient and water uptake.
Reduces Chemical Fertilizer Requirement
Regular use of PSB can reduce phosphorus fertilizer usage by 20–30 percent while maintaining crop productivity.
Improves Soil Fertility
The microbial activity increases biological health of the soil and improves long-term soil structure.
Boosts Crop Yield and Quality
Enhanced nutrient uptake supports better plant growth, flowering, and fruit development.
Eco-Friendly and Sustainable
PSB is a natural biofertilizer that supports environmentally sustainable farming practices.
Usage and Crop Recommendations
| Crop | Purpose | Dosage/ha | Method of Application |
|---|---|---|---|
| Cereals (Wheat, Rice, Maize) | Improve phosphorus uptake | 1 – 2 L | Soil application or seed treatment |
| Pulses (Gram, Pigeon Pea, Lentil) | Root development and yield improvement | 1 – 2 L | Seed treatment or soil application |
| Oilseeds (Soybean, Groundnut, Mustard) | Better flowering and pod formation | 1 – 2 L | Soil application |
| Vegetables (Tomato, Brinjal, Chilli, Cucumber) | Strong plant growth | 1 – 2 L | Drip or soil application |
| Fruits (Mango, Banana, Grapes, Pomegranate) | Nutrient efficiency and yield improvement | 2 – 3 L | Soil application near root zone |
Method of Application
Seed Treatment: Mix PSB culture with water and coat seeds evenly before sowing.
Soil Application: Mix PSB with well-decomposed farmyard manure or compost and apply to soil during field preparation.
Drip Irrigation: Liquid PSB can be applied through drip irrigation systems for better root zone colonization.
Research-Based Insights
Agricultural research conducted by institutions such as the Indian Council of Agricultural Research shows that phosphate solubilizing bacteria can increase phosphorus availability in soil by releasing organic acids such as gluconic acid and citric acid. Studies indicate that PSB application can improve crop yield by 10–25 percent depending on soil fertility and crop type.
PSB also enhances microbial diversity in the rhizosphere, helping plants absorb nutrients more efficiently and improving long-term soil productivity.
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