limit feeding, crude protein. Monensin, ADG, feed efficiency
One hundred ninety-two Angus and Angus x Limousin calves (611 lb) were randomly allotted to one of four Levels of crude protein intake and three dosages of monensin in an 80% concentrate diet. Intake of the complete diet was restricted to allow 2.2 lb average daily gain over an 86-day period. Crude protein was fed at 90, 100, 110 or 120% of the gram daily requirement described by NRC. Monensin was fed at 120, 180 or 240 mg/head/day. Each 10% increase in dietary crude protein caused a .13 lb increase in ADG, a .34 unit improvement in feed efficiency and .90 mg/dl increase in plasma urea nitrogen (P< .001). Increasing monensin from 120 to 180 mg/head/day improved ADG .19 lb per day and feed/gain .56 units (P<.01). There was no additional response to feeding monensin at 240 mg/head/day.
Number of Pages
South Dakota State University
Copyright © 1987 South Dakota State University
Sip, M.L.; Pritchard, R.H.; and Robbins, M.A., "Optimun Levels of Dietary Crude Protein and Monensin for Steer Calves on Limit-Fed, High Concentrate Diets" (1987). South Dakota Beef Report, 1987. 7.