Application Methods and Dosage Guide for 25% γ-PGA in Agriculture
Gamma-polyglutamic acid (γ-PGA), a high-efficiency natural water-soluble biopolymer, is widely used in agriculture due to its unique properties such as water retention, slow release, and fertilizer enhancement. Below is a detailed guide for the application methods and dosage of a 25% γ-PGA product.
1. Key Applications and Benefits
- Soil Improvement
- Enhances soil water retention capacity.
- Improves soil aeration and mitigates compaction issues.
- Promotes the decomposition of organic matter.
- Fertilizer Efficiency Enhancement
- Improves the absorption and utilization rate of nitrogen, phosphorus, potassium, and trace elements.
- Reduces nutrient loss and extends fertilizer slow-release time, ensuring stable nutrient supply.
- Stress Resistance
- Enhances crop tolerance to drought, cold, and diseases.
- Improves the root environment and promotes root growth.
- Improved Crop Quality
- Increases photosynthesis efficiency, leading to higher yields, improved taste, and better overall crop quality.
2. Application Methods and Recommended Dosage
1. Fertigation (Drip Irrigation/Soil Application)
- Method: Dilute γ-PGA with water and apply it directly to the soil around the roots.
- Dosage: Use 3-4 liters of 25% γ-PGA per hectare, diluted at a ratio of 1:500-1:1000.
- Frequency: Apply 2-3 times during the growth period, depending on the crop’s nutritional needs.
2. Foliar Spraying
- Method: Dilute with water and spray evenly on crop leaves.
- Dosage: Use 0.75-1.5 liters per hectare, diluted at a ratio of 1:800-1:1200.
- Frequency: Spray every 10-15 days. Apply in the early morning or late afternoon to avoid direct sunlight.
3. Base Application/Mixed Fertilizer
- Method: Mix γ-PGA with conventional fertilizers (e.g., compound fertilizers, urea) and apply to the soil.
- Dosage: Add 15-20 kg of 25% γ-PGA per ton of fertilizer and apply evenly.
- Note: Ensure uniform mixing, especially with granular fertilizers.
4. Seed Treatment
- Method: Soak seeds in a diluted γ-PGA solution to enhance germination rates and seedling resilience.
- Dosage: Dilute at a ratio of 1:1000-1:2000 and soak seeds for 6-12 hours.
- Suitable Crops: Cereal crops, economic crops, and vegetable seeds.
3. Recommended Dosage for Different Crops
| Crop Type | Application Stage | Fertigation Dosage (per hectare) | Foliar Spray Dosage (per hectare) |
|---|---|---|---|
| Cereal Crops | Jointing, Grain-fill | 3-4 liters | 0.75-1.2 liters |
| Fruit Trees | Flowering, Fruit-set | 4.5-6 liters | 1-1.5 liters |
| Vegetables | Post-transplanting, Harvest | 3-4 liters | 1-1.5 liters |
| Economic Crops | Entire Growth Period | 3.5-5 liters | 0.75-1.2 liters |
4. Precautions
- Use Immediately After Dilution: γ-PGA degrades easily; diluted solutions should be used promptly to avoid reduced effectiveness.
- Compatibility Testing: Before mixing with strongly acidic or alkaline pesticides or fertilizers, conduct a small-scale compatibility test.
- Application Conditions: Avoid applying under high temperatures or direct sunlight to minimize the decomposition of active ingredients.
- Storage: Store in a cool, dry, and well-ventilated place, away from direct sunlight.
The proper use of γ-PGA can significantly enhance agricultural productivity, reduce fertilizer usage, and improve crop quality, making it an ideal choice for modern sustainable farming practices.
