Product Information
- Product Name: Polyglutamic Acid Granules
- Description: A biodegradable granular biostimulant, soil conditioner, and fertilizer synergist derived from microbial fermentation of γ-polyglutamic acid (γ-PGA), a homo-polymer of glutamic acid units. This product typically contains a minimum of 8% γ-PGA combined with plant-based proteins, free amino acids, fulvic acid, and trace elements. It enhances water retention, nutrient chelation, and soil structure while acting as a synergist to improve fertilizer efficiency and plant stress resistance. Ideal for sustainable and organic agriculture.
- Form: Light brown to dark brown granules
- Odor: Mild characteristic organic scent
- Source: Produced via fermentation by Bacillus species (e.g., Bacillus subtilis), followed by granulation for controlled release.
- CAS No.: 25513-46-6 (for γ-polyglutamic acid)
Key Specifications
| Parameter | Value/Range |
|---|---|
| Polyglutamic Acid (γ-PGA) Content | ≥ 8% (dry basis) |
| Free Amino Acids | ≥ 6–14% (dry basis) |
| Plant-Based Protein | ≥ 60–70% (dry basis) |
| Fulvic Acid | ≥ 10% (dry basis) |
| Total Nitrogen (N) | ≥ 6% (dry basis) |
| Phosphorus (P₂O₅) | ≥ 0% (trace) |
| Potassium (K₂O) | ≥ 1.68–3% (dry basis) |
| Total NPK | ≥ 10–12% (dry basis) |
| Trace Elements | ≥ 1–2% (dry basis) |
| Moisture Content | ≤ 1–5% |
| pH | 3.0–5.0 |
| Solubility | Partially to fully water-soluble (depending on application) |
| Molecular Weight | 100–2000 kDa (typical) |
Benefits and Functions
- Superior water retention: Absorbs and holds multiple times its weight in water, reducing irrigation needs and alleviating drought stress.
- Nutrient chelation and retention: Prevents leaching of N, P, K, and micronutrients, improving fertilizer utilization by 10–30%.
- Soil structure improvement: Promotes aggregation, enhances porosity, and balances pH to mitigate acidification or salinization.
- Plant growth promotion: Stimulates root development, enhances stress tolerance (drought, salinity, temperature extremes), and increases yield by 10–25%.
- Biostimulant effects: Induces beneficial microbial activity and endogenous hormones for improved crop quality and resistance.
- Environmentally friendly: Fully biodegradable, non-toxic, and reduces chemical fertilizer dependency.
Recommended Application
- Methods: Soil incorporation (base application), broadcasting, fertigation, or mixing with compound fertilizers.
- Dosage Rates:
- Soil Application: 10–70 kg/ha (optimal around 65 kg/ha for maximum efficiency).
- As Fertilizer Synergist: Add 0.05–0.08% to urea/NPK during granulation, or 5–8% in compound fertilizers.
- Alone or Mixed: 2–10 kg/ha for direct use.
- Frequency: 1–2 applications per season, ideally at planting or early growth stages.
- Crops: Suitable for cereals, vegetables, fruits, cotton, alfalfa, and crops in arid/sandy soils.
Storage and Handling
- Store in a cool, dry place away from direct sunlight and moisture.
- Shelf Life: 2–3 years under proper conditions.
- Precautions: Non-toxic and non-hazardous; use standard protective equipment to avoid dust inhalation.
Safety and Environmental Notes
- Classified as non-hazardous; fully biodegradable with no residual pollution.
- Supports sustainable agriculture by enhancing resource efficiency and reducing environmental impact from nutrient runoff.