Table 1: Effects of slow-release urea products on dry matter intake and nutrient digestibility
Source Type of SRU Suppl., % diet Animal DMI kg/d Digestibility, %
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DM CP NDF OM
Puga et al. (2001) Urea 0 Sheep 5.9 58.6 - 67.8 57.6
Control release 30* 8.2 64.8 - 74.0 63.2
Galina et al. (2003) SRU 0 Beef 5.8 58.8 - 57.1 48.4
SRU 1.8 8.2 68.7 75.1 59.7
Highstreet et al. (2010) Urea 1.8 Cows 28.2 - 70.9 50.9 -
Encapsulated urea 1.7 28.6 - 70.8 50.0 -
Xin et al. (2010) Urea 0.6 Cows 20.2 46.3 43.5 13.9 46.7
Polyurethane coated urea 0.6 22.8 51.0 44.6 18.5 51.2
*Supplementation of 30% control release in forages