China 60~180days Coated NPK 28-5-14 +Fulvic acid+Amino acid+Humic acid +OM+TE Controlled Release Fertilizer factory and suppliers

60~180days Coated NPK 28-5-14 +Fulvic acid+Amino acid+Humic acid +OM+TE Controlled Release Fertilizer

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Polymer Coated NPK 28-5-14 + Additives – Precision Green Tea Fertilizer

Polymer Coated NPK 28-5-14 with Fulvic Acid, Amino Acid, Humic Acid, Organic Matter (OM), and Trace Elements (TE) delivers targeted nutrition for green tea cultivation. Engineered for 60-180 day controlled release, its polymer coating ensures gradual nutrient delivery synchronized with tea flush cycles. The high-nitrogen formula (28 percent N) promotes vigorous leaf growth and amino acid accumulation, enhancing flavor compounds like theanine. Low phosphorus (5 percent P2O5) minimizes runoff risks in hilly plantations, while potassium (14 percent K2O) strengthens disease resistance. Organic additives (2 percent fulvic acid, 1.5 percent amino acids, 3 percent humic acid, 8 percent OM) improve soil fertility in acidic tea soils and boost nutrient uptake efficiency by 40 percent. TE prevents micronutrient deficiencies in heavily harvested bushes. Ideal for single-application programs, it reduces leaching by 60 percent and labor costs by 50 percent versus conventional fertilizers. Uniform 2.0-3.5 mm granules ensure even broadcasting. Customize release duration (60/90/120/180 days) to match regional harvest frequency. Optimize yield and cup quality sustainably.

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POLYMER COATED NPK 28-5-14 + ADDITIVES – GREEN TEA SPECIALTY GRADE

Controlled-Release Nitrogen-Focused Fertilizer | Duration: 60-180 Days

TECHNICAL SPECIFICATIONS

Total Nitrogen (N): 28 percent (18 percent Ammoniacal N, 10 percent Urea N)
Available Phosphate (P2O5): 5 percent
Soluble Potash (K2O): 14 percent
Organic Additives:
Fulvic Acid 2 percent
Amino Acid 1.5 percent
Humic Acid 3 percent
Organic Matter (OM) 8 percent
Trace Elements (TE):
Magnesium (Mg) 0.3 percent, Zinc (Zn) 0.05 percent, Manganese (Mn) 0.1 percent, Boron (B) 0.02 percent
Granule Size: 2.0-3.5 mm
Release Mechanism: Moisture and temperature dependent
Release Duration Options: 60, 90, 120, 180 days
Bulk Density: 1.10 g/cm³

KEY BENEFITS
1. Leaf Yield and Quality Enhancement
28 percent nitrogen increases shoot growth and theanine content for superior flavor.

2. Soil Acidification Management
Humic acid buffers soil pH between 4.5-5.5 optimal for tea.

3. Nutrient Efficiency
Polymer coating reduces nitrogen leaching by 60 percent in high-rainfall regions.

4. Stress Resistance
Amino acids mitigate drought stress during flush periods.

5. Sustainability
Low phosphorus formula minimizes environmental impact on slopes.

APPLICATION GUIDE

Growth Stage	Ideal Duration	Application Rate
Pruning Recovery	60-90 days	500-600 kg per hectare

Maintenance Phase | 90-120 days | 400-500 kg per hectare |
Peak Harvest Season | 120-180 days | 300-400 kg per hectare |

TEA-SPECIFIC FEATURES

Amino Acid Boost: Increases L-theanine synthesis by 15-20 percent
Low Chloride Formula: Less than 1 percent chloride prevents leaf burn
Acid Soil Adaptation: Maintains solubility below pH 5.0

USAGE INSTRUCTIONS

Apply post-pruning or before monsoon season
Broadcast evenly within tea bush rows
Incorporate lightly into topsoil
Avoid direct contact with tender shoots

COMPATIBILITY

Compatible with organic mulches
Do not mix with alkaline amendments

STORAGE REQUIREMENTS

Shelf Life: 18 months below 30 degrees Celsius
Moisture Control: Maximum 50 percent relative humidity
Bulk Handling: Use covered containers to prevent moisture absorption

ORDERING PARAMETERS
Specify:

Release duration: 60, 90, 120, or 180 days
Packaging: 25 kg Bags or 1000 kg Big Bags
Quantity (Metric Tons)

QUALITY CONTROL

Heavy Metals: Cadmium less than 1 mg/kg, Lead less than 10 mg/kg (compliant with EU tea safety standards)
Nutrient Variance: Plus or minus 0.5 percent
Granule Uniformity: 90 percent within 2.0-3.5 mm size

SAFETY PROTOCOLS