Fertilizer Grade Acidic Potassium Phosphate (AKP) – Solution for Alkaline Soil & High-Efficiency Fertigation
Alkaline soils and hard irrigation water present significant challenges for modern agriculture – phosphorus availability drops, drip lines clog with mineral deposits, and crop yields suffer.
Through years of collaboration with agronomists and large-scale growers, we have developed fertilizer grade Acidic Potassium Phosphate (AKP) – a high-concentration (0-60-20), fully water-soluble phosphorus-potassium compound with strong acidity (pH 1.1-2.4). This innovative solution not only delivers essential nutrients but also actively conditions irrigation systems and unlocks soil-bound phosphorus, making it the ideal choice for alkaline soil remediation and high-efficiency fertigation.
100% water-soluble, high-analysis P₂O₅ (60%) + K₂O (20%) fertilizer for alkaline soils, hard water conditions, and drip irrigation systems. Lowers pH, prevents scaling, and maximizes nutrient availability.
Why Fertilizer Grade AKP?
| Parameter | Benefit |
| Ultra-high nutrient concentration | P₂O₅ ≥60%, K₂O ≥20% – total nutrients up to 80% – reduces storage, handling, and freight costs |
| Strong acidity (pH 1.1-2.4) | Lowers irrigation water pH; unlocks phosphorus fixed in alkaline soils |
| 100% water solubility | Zero residue – ideal for drip irrigation, sprinklers, and foliar sprays |
| Prevents scaling | Dissolves calcium/magnesium carbonates; eliminates mineral deposits in drip lines |
| Improves soil structure | Reduces surface crusting; enhances water infiltration |
| Safe handling | Replaces corrosive acids in fertigation systems – safer for operators |
Typical Applications
| Application | Function |
| Dairy cattle feed | Supplies NPN for rumen microbes + phosphorus for milk production and bone health |
| Beef cattle finishing rations | Improves feed efficiency and weight gain |
| Sheep & goat feed | Supports growth and reproduction in small ruminants |
| Liquid feed supplements | Fully soluble – ideal for lick tanks and liquid protein supplements |
| Molasses-based blends | Compatible with molasses for free-choice supplementation |
| Drinking water supplementation | Quick-dissolving for direct nutrient delivery |
Typical Applications
| Application | Function | Benefit |
| Alkaline soil remediation | Lowers rhizosphere pH; unlocks fixed phosphorus | Increases P availability by 30-50% |
| Drip irrigation / Fertigation | Prevents line clogging; delivers P+K directly to root zone | Uniform application; reduced maintenance |
| Foliar spray | Fast absorption through leaf surfaces | Rapid correction of P/K deficiencies |
| Hydroponics | Supplies P+K with pH-lowering effect | Precision nutrient control |
| Fruit trees & vines | Promotes flowering, fruit set, and sugar accumulation | Improved quality and yield |
| High-value cash crops | Vegetables, flowers, tobacco, cotton, tea | Enhanced stress resistance |
Product Specification
Fertilizer Grade Acidic Potassium Phosphate (AKP)
| Parameter | Specification |
| CAS No. | 7778-77-0 / 7778-80-5 |
| Molecular Formula | KH₅(PO₄)₂ |
| Main content | ≥98.0% |
| P₂O₅ (Phosphorus pentoxide) | ≥60.0% |
| K₂O (Potassium oxide) | ≥20.0% |
| NPK Ratio | 0-60-20 |
| pH (1% solution) | 1.1 – 2.4 |
| Moisture | ≤0.5% |
| Water insolubles | ≤0.1% |
| Appearance | White crystalline powder or granules |
| Water solubility | 1 |
| Packaging | 25kg woven bag / 1000kg jumbo bag / customized |
✅ Available upon request: Granular form for bulk blending, low-chloride grade, customized packaging
Key Customer Benefits
✅ Highest P₂O₅ concentration on the market (60%) – More phosphorus per kilogram reduces logistics costs and storage footprint
✅ Strong acidity for alkaline soils – 1% solution pH as low as 1.1 – effectively neutralizes bicarbonate in irrigation water and soil
✅ Prevents drip line clogging – Dissolves calcium and magnesium carbonates; can even clean already-plugged lines
✅ Improves water infiltration – Reduces surface sealing and crusting in sodic/alkaline soils
✅ Increases fertilizer efficiency – Unlocks soil-bound nutrients; reduces phosphorus fixation by 30-50%
✅ Safer than mineral acids – Replaces sulfuric/phosphoric acid in fertigation systems – safer handling for farm workers
✅ Enhances crop quality – Promotes flowering, fruit set, sugar accumulation, and color development
✅ Full export documentation – COA, MSDS, non-hazardous certificate, origin certificate, customs clearance support
AKP vs. Other Phosphorus-Potassium Fertilizers
| Parameter | AKP (0-60-20) | MKP (0-52-34) | DKP (0-40-53) | TSP (0-46-0) |
| P₂O₅ content | ≥60% | ≥52% | ≥40% | ≥46% |
| K₂O content | ≥20% | ≥34% | ≥53% | 0 |
| pH (1% solution) | 1.1-2.4 (strongly acidic) | 4.2-4.8 (weakly acidic) | 8.8-9.2 (alkaline) | ~4.5 (acidic) |
| Water solubility | 1 | 1 | 1 | Low |
| Best for | Alkaline soil + hard water | All-purpose P+K | K-rich applications | Soil P only |
| Drip irrigation | ✅ Excellent | ✅ Good | ⚠️ May raise pH | ❌ Not suitable |
| Acidifying effect | ✅ Strong | ⚠️ Weak | ❌ None | ⚠️ Weak |
Recommendation: Choose AKP when you need both high-concentration phosphorus AND strong acidifying action – especially for alkaline soils, hard irrigation water, or to prevent/remediate drip line scaling.
Application Guidelines
| Crop Type | Recommended Method | Typical Dosage | Timing |
| Fruit trees | Drip fertigation / Foliar | 3-8 kg/ha per application | Pre-flowering, fruit set, fruit development |
| Vegetables | Drip irrigation / Foliar | 2-5 kg/ha per application | Growth, flowering, fruiting stages |
| Field crops (cotton, corn) | Drip / Sprinkler fertigation | 3-6 kg/ha per application | Early growth to flowering |
| Hydroponics | Nutrient solution | 100-200 ppm P₂O₅ | Throughout growing cycle |
| Alkaline soil amendment | Soil application (dissolved) | 5-10 kg/ha (pre-plant) | Before planting or early season |
Important: AKP is strongly acidic. Always conduct a jar test before mixing with other fertilizers or pesticides. Avoid mixing with alkaline products (e.g., calcium nitrate, lime) as precipitation may occur.
Technical support available – Contact us for custom fertigation programs based on your soil test and water quality analysis.
Handling & Storage Recommendations
Store in a cool, dry, well-ventilated warehouse
Keep in original sealed packaging – hygroscopic
Avoid moisture, direct sunlight, and contact with alkalis
Use corrosion-resistant equipment for solution preparation (stainless steel or plastic)
Shelf life: 24 months under proper storage conditions
Safety: Wear gloves and goggles when handling concentrated solutions
Quality & Compliance
| Item | Details |
| Third-party testing | SGS / BV / Intertek available upon request |
| Documents provided | COA, MSDS, packing list, B/L, origin certificate, non-hazardous declaration |
| Certifications (if available) | ISO 9001 |
Call to Action
Need fertilizer grade AKP samples or technical support for alkaline soil management?
Need TSP samples or technical data sheet?
Contact us for COA and quotation
yifriendship@sino-phosphate.com
Submit your inquiry online – reply within 24 hours
FAQ
Q: What is the difference between AKP and MKP?
A: AKP (0-60-20) has a higher P₂O₅ content (60% vs. 52%) and is much more acidic (pH 1.1-2.4 vs. 4.2-4.8). AKP is specifically designed for alkaline soils and hard water conditions, while MKP is a general-purpose P-K fertilizer.
Q: Can AKP clean already-plugged drip lines?
A: Yes. AKP’s strong acidity dissolves calcium and magnesium carbonate deposits. Inject AKP solution at 0.5-1.0% concentration into plugged lines and let sit for 30-60 minutes before flushing.
Q: Is AKP suitable for foliar application?
A: Yes, but dilute adequately (0.2-0.5% solution) to avoid leaf burn due to its low pH. Always conduct a small-area test first. Best applied during cooler hours (early morning or evening).
Q: Can AKP be mixed with other fertilizers?
A: AKP is compatible with most acidic and neutral fertilizers. Do not mix with alkaline products such as calcium nitrate, potassium carbonate, lime, or copper-based fungicides – precipitation may occur. Always perform a jar test before large-scale mixing.
Q: What crops benefit most from AKP?
A: AKP is ideal for crops grown in alkaline or calcareous soils, including fruit trees (citrus, apple, grape), vegetables (tomato, pepper, cucumber), field crops (cotton, corn, soybean), and flowers. It is particularly valuable in regions with hard irrigation water.
Q: How does AKP improve water infiltration in alkaline soils?
A: AKP lowers soil pH around the root zone, dispersing sodium and reducing surface crusting. This allows water to penetrate more easily, reducing runoff and improving root zone moisture.