Product Overview
Calcium Cyanamide (CaCN₂, 19-21% N, ~50% CaO) is a unique multifunctional nitrogen fertilizer that simultaneously provides nitrogen nutrition, lime application, soil disinfection, and weed suppression. When incorporated into moist soil, it undergoes a series of chemical transformations — from cyanamide (a temporary biocide) to urea and finally to ammonium and nitrate nitrogen — providing slow-release feeding over 6-12 weeks. Dongkwang Poland supplies granular calcium cyanamide from Europe’s leading producer for specialty applications in vegetables, viticulture, and disease-suppressive soil management.
How Calcium Cyanamide Works
In soil, CaCN₂ hydrates to form calcium hydroxide (liming) and free cyanamide (H₂NCN). Cyanamide is toxic to soil organisms for 7-14 days — killing weed seeds, nematodes, and fungal pathogens in the application zone. It then converts to urea, which hydrolyses to ammonium and eventually nitrifies to nitrate. This 6-12 week transformation cascade provides the longest natural nitrogen release of any conventional fertilizer. The calcium component raises soil pH like agricultural lime.
Key Benefits
Application Guide
Apply 500-1,000 kg/ha and incorporate into the top 10-15cm of soil 2-3 weeks before planting (to allow the biocidal cyanamide phase to pass). For vegetables: 600-800 kg/ha. For vineyards: 400-600 kg/ha in early spring between rows. For mushroom substrate: 30-40 kg/m³. Do NOT apply to growing crops — the cyanamide phase is phytotoxic. Always incorporate into soil; surface application is ineffective.
Ideal For
Storage & Handling
Store in dry conditions away from moisture. Calcium cyanamide reacts with water to release cyanamide gas (irritant). Wear PPE: gloves, dust mask, goggles. Avoid skin contact and inhalation. Do not consume alcohol within 48 hours of handling (cyanamide causes a disulfiram-like reaction). Shelf life: 24 months in sealed packaging.
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