Urea (Feed Grade)
Urea (feed grade) is a synthetic nitrogen compound used as a non‑protein nitrogen (NPN) source in ruminant feeds, primarily for beef and dairy cattle. It is a white crystalline or granular material of high purity and defined nitrogen content, which rumen microorganisms convert into microbial protein. This microbial protein then serves as an amino acid source for the animal, allowing urea to partially replace more expensive natural protein ingredients in beef and dairy rations. The product is intended exclusively for use in ruminants, following recommended inclusion levels and formulation rules, and must not be used for monogastric animals.
Source
- Produced by chemical synthesis from ammonia and carbon dioxide under controlled industrial conditions.
- Feed grade urea is specifically controlled and tailored for use in animal feeds (particle size, purity, limitation of undesirable impurities).
- Supplied mainly as low‑moisture granules or powder in packaging that protects against moisture uptake and caking.
Variations
- Standard feed grade urea (approx. 46% N) for use in concentrates and premixes for ruminants.
- Urea incorporated into mineral‑vitamin premixes and protein‑mineral lick blocks for more controlled intake.
- Protected or slow‑release urea formulations (coated urea) providing a more gradual nitrogen release in the rumen, better matching energy supply and reducing risk of toxicity.
Applications In The Industry
Beef
In beef cattle, urea is used as part of concentrates and complementary feeds in rations based on forages (silage, hay, straw) that are relatively low in protein but provide sufficient energy from carbohydrates. In well‑balanced total mixed rations (TMR), urea supplies an economical nitrogen source for rumen microflora, supporting microbial protein synthesis and improved utilization of energy from fibre. Typical applications include:
- inclusion in premixes and concentrates that are mixed with forages on farm,
- incorporation into protein‑mineral supplements for upgrading home‑mixed diets.
- Inclusion rates are adjusted according to age, body weight, performance level and forage quality, always respecting maximum recommended urea levels in ration dry matter.
Dairy cows
In dairy cows, urea is used in TMR diets, concentrates and premixes for high‑producing animals, especially when base rations are built on corn silage and other energy‑rich but protein‑deficient feeds. The objective is to optimize the balance between available nitrogen and fermentable energy in the rumen, supporting microbial protein synthesis, rumen function and stable milk yield. Urea is typically:
- included in premixes for dairy cows with clear recommendations for maximum inclusion in the final diet,
- used in protein‑energy concentrates designed to be mixed with forages.
- Special care is given to even distribution of urea in the mix, gradual introduction to the diet and alignment with levels of soluble protein and sugars, to minimize the risk of fermentation disorders and intoxication.
Benefits Of Use
- Cost‑effective non‑protein nitrogen source that can partially replace expensive protein ingredients (such as soybean meal, sunflower meal) in ruminant diets.
- Enables optimization of rumen fermentation and microbial protein synthesis when correctly balanced with the energy portion of the ration.
- Increases formulation flexibility of TMR, concentrates and premixes under conditions of limited availability or variable quality of natural protein raw materials.
- Can contribute to better utilization of forages and more stable performance (beef growth, dairy milk yield) when used within recommended levels and proper safety practices.
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