| Product Name | Nitrogen Fertilizer |
| Definition | Fertilizer with specified nitrogen (N) content that provides nitrogen nutrition to crops. Nitrogen is a component of amino acids and proteins in plants, as well as a key part of chlorophyll, playing a decisive role in photosynthesis and growth. |
| Main Forms | Ammonium nitrogen, Nitrate nitrogen, Amide nitrogen, Slow-release nitrogen |
| Main Types & Nitrogen Content | Urea: 46% (amide, highest N content); Ammonium Sulfate: 20-21% (ammonium, contains sulfur); Ammonium Chloride: 24-25% (ammonium, contains chlorine); Ammonium Bicarbonate: 17% (ammonium, quick-acting); Ammonium Nitrate: 34-35% (nitrate, fast action, regulated); Calcium Nitrate: 15.5% (nitrate, contains calcium); Sulfur-Coated Urea (SCU): 34-37% (slow-release, yellow granules) |
| Ammonium Nitrogen Features | Directly absorbed by plants as NH₄⁺; easily adsorbed by soil colloids, slow mobility; suitable for both paddy and dry land; best applied as base fertilizer with deep placement to reduce volatilization |
| Nitrate Nitrogen Features | Directly absorbed by plants as NO₃⁻; not easily adsorbed, high mobility, prone to leaching; suitable for dry land topdressing, not for waterlogged areas; fast fertilizer response |
| Amide Nitrogen Features | Urea as representative; requires conversion to ammonium nitrogen in soil before absorption; highest nitrogen content; neutral fertilizer; suitable for all soil types; deep placement recommended |
| Slow-release Nitrogen Features | Sulfur-Coated Urea (SCU) as representative; urea granules coated with sulfur; nutrient release controlled by sulfur membrane thickness; also provides sulfur nutrition; improves nitrogen use efficiency by 10-20%; reduces topdressing frequency; yellow or light yellow appearance |
| Main Applications | Agricultural crops: rice, corn, wheat, cotton, soybean, sugarcane, vegetables, fruit trees as base or top dressing; Fertigation: calcium nitrate and other soluble nitrogen fertilizers for drip and sprinkler irrigation; Compound fertilizer raw material |
| Packaging | 25kg/50kg woven bags (PE liner), 1000kg jumbo bags; liquid nitrogen (ammonia water) by tank trucks or IBC totes |
| Storage Conditions | Store in cool, dry, well-ventilated area, protect from moisture and rain; ammonium nitrogen fertilizers avoid mixing with alkaline substances; urea avoid high temperature and humidity to prevent caking |
| Shipping Requirements | Most solid nitrogen fertilizers are non-hazardous, shipped as general cargo; liquid ammonia is hazardous (Class 2.3 toxic gas); protect from moisture and rain, handle with care |
| Quality Standards | Urea: GB/T 2440-2017; Ammonium Sulfate: GB/T 535-2020; Ammonium Chloride: GB/T 2946-2018; Ammonium Nitrate: GB 44022-2024 (regulated); Sulfur-Coated Urea: GB/T 29401-2020 |
| Minimum Order Quantity | Standard 20-25 tons (1×20'FCL); trial order 5-10 tons (bags) negotiable |
| Delivery Time | Standard 7-15 working days; custom packaging 15-25 working days |
| Payment Terms | T/T (30% deposit, 70% against B/L copy); FOB/CFR/CIF supported |
