Protein Expanded Urea
Overview
Protein-expanded urea is a modified urea product where urea granules are coated or blended with protein sources (e.g., soybean meal, yeast) and processed through extrusion or expansion technologies. This innovation addresses urea's rapid hydrolysis in ruminant digestion, allowing controlled nitrogen release for improved microbial protein synthesis. Widely adopted in intensive livestock farming, it enhances feed efficiency while mitigating environmental ammonia emissions. The expansion process creates a porous structure that slows urea dissolution, synchronizing nitrogen availability with microbial activity in the rumen.
Physical and Chemical Properties
The product combines urea's high nitrogen content (46%) with protein coatings that typically constitute 20-40% of total weight. Its granular form (0.5-3mm particle size) ensures even feed mixing. The expansion process reduces bulk density by 15-30% compared to pure urea. Key chemical behavior includes gradual hydrolysis at rumen pH (6.0-7.0), with protein coatings acting as physical barriers. Thermal stability allows incorporation into pelleted feeds up to 80°C. Unlike conventional urea, it demonstrates reduced hygroscopicity due to protein encapsulation.
Main Applications
Primary use is in ruminant nutrition (dairy cattle, beef cattle, sheep) as a non-protein nitrogen (NPN) source, replacing 20-30% of dietary crude protein. When properly dosed (≤1.5% of total feed), it boosts milk yield and weight gain by optimizing rumen fermentation. Secondary applications include aquaculture feed for microbial floc systems and specialty fertilizers requiring slow nitrogen release. Some formulations integrate probiotics or minerals to create multifunctional additives. In total mixed rations (TMR), it improves ingredient binding and reduces feed sorting.
Safety and Storage
Requires careful handling to prevent protein denaturation or urea crystallization. Store in sealed containers below 30°C with ≤60% humidity. Shelf life typically reaches 12 months with proper storage. Safety protocols mandate PPE (gloves, masks) during handling to avoid respiratory irritation. Maximum inclusion rates vary by animal species: 1% of dry matter for dairy cows, 0.5% for young ruminants. Always mix thoroughly with other feed components to prevent localized high concentrations.
B2B Procurement Guide
Industrial buyers should prioritize suppliers with ISO 22000 or FAMI-QS certification for feed additives. Key specifications to verify include: protein coating percentage (analyzed via Kjeldahl method), expansion ratio (1:1.2-1.5 ideal), and mycotoxin content (<50ppb). Bulk purchases (20+ tons) often qualify for 5-10% discounts. Consider regional logistics—coastal factories may offer better rates for export. Request stability data for specific feed processing conditions (steam, pelleting). Sample testing should confirm uniform particle size distribution and absence of urea hotspots.
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