PRODUCTS

Urea 46%: Product Introduction, Composition & Efficacy

Urea 46% is a high-concentration solid nitrogen fertilizer widely recognized as the "gold standard" in agricultural nitrogen inputs, favored globally for its ultra-high nitrogen content, excellent solubility, and broad applicability. With a nitrogen (N) content of exactly 46%—the highest among common granular nitrogen fertilizers—it is suitable for almost all crops (including wheat, rice, corn, cotton, fruits, and vegetables) and various soil types (neutral, slightly acidic, and slightly alkaline). Its fine granular form ensures uniform spreading, while low hygroscopicity minimizes caking during storage and transportation, making it a preferred choice for both large-scale agricultural plantations and smallholder farms. Beyond agriculture, it also serves as a raw material in livestock feed additives (providing non-protein nitrogen) and light industry (for urea-formaldehyde resins).

1.Composition

1.1. Core Active Component

Urea (CO(NH₂)₂): Purity ≥ 99.2%, the sole source of nitrogen in the product. This high-purity urea is synthesized via the ammonia carbonation process, ensuring stable nitrogen release and no harmful by-products. The 46% nitrogen content is achieved through precise control of synthesis parameters, making it the most nitrogen-dense solid fertilizer available—1 ton of Urea 46% provides the same nitrogen as 2.2 tons of ammonium sulfate (21% N) or 1.8 tons of ammonium nitrate (26% N), reducing transportation and application costs significantly.

1.2. Trace Impurities (Within Industry Standards)

Moisture: ≤ 0.4%. Strict moisture control prevents granular caking and ensures the product remains free-flowing, even in humid environments. Excess moisture is avoided to prevent urea hydrolysis before application, which would reduce nitrogen availability.

Biuret (C₂H₅N₃O₂): ≤ 0.8%. Biuret is a natural by-product of urea production, but its content is strictly limited here—well below the 1.0% threshold set by global agricultural standards (e.g., China’s GB/T 2440-2020, EU’s EN 15705). This low biuret level eliminates the risk of "leaf burning" or root damage, even when applied directly to seedling-stage crops.

Ash Content: ≤ 0.08%. Composed of trace inorganic salts (e.g., sodium chloride, potassium sulfate), the minimal ash content ensures no soil salinization or nutrient imbalance, even with long-term application.

2.Efficacy

2.1. Rapid & Efficient Nitrogen Supply

Urea 46% dissolves quickly in water (solubility: 108 g/100 mL at 20°C) and is hydrolyzed into ammonium ions (NH₄⁺) by urease (a natural enzyme in soil) within 3–7 days. These ammonium ions are directly absorbed by crop roots, providing rapid nutrient support for key growth stages:

Seedling Stage: Promotes the growth of new leaves and roots, enhancing crop resistance to drought and pests.

Tillering/Flowering Stage: Boosts tillering in grain crops (e.g., wheat, rice) and flower bud differentiation in fruit crops, increasing the number of effective ears or fruits.

Filling/Maturing Stage: Improves photosynthate accumulation, increasing grain plumpness and fruit sugar content—field tests show a 10–15% yield increase for staple crops when applied correctly.

2.2. Soil-Friendly & Versatile Application

Soil Adaptability: Unlike ammonium sulfate (which acidifies soil), Urea 46% has a near-neutral pH (6.0–7.0 in aqueous solution), making it safe for long-term use in all soil types. It can even help buffer slightly acidic or alkaline soils when combined with organic fertilizers.

Flexible Application Methods: Suitable for broadcast spreading, side-dressing, and foliar spraying (when diluted to 0.5–1.0% concentration). For drip irrigation systems, it dissolves completely without clogging pipes, reducing water and fertilizer waste by 20–30% compared to traditional fertilizers.

2.3. Cost-Effective & Sustainable

With its high nitrogen density, Urea 46% reduces transportation, storage, and labor costs—farmers need to handle less product to achieve the same nutrient effect. Additionally, its low biuret and impurity content means no excess residues in soil or crops, complying with global food safety standards (e.g., EU’s Maximum Residue Limits, MRLs) and supporting sustainable agricultural practices.