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Full-Text Articles in Animal Sciences
High-Moisture Ear Corn And Corn Silage In Backgrounding Cattle Diets, M.L. Sip, R.H. Pritchard, M.A. Robbins
High-Moisture Ear Corn And Corn Silage In Backgrounding Cattle Diets, M.L. Sip, R.H. Pritchard, M.A. Robbins
South Dakota Beef Report, 1988
One hundred ninety-two Angus x Limousin steer calves (560 lb) were used in an 85-day backgrounding trial. Dietary crude protein levels of 90, 100, 110 and 120% of the NRC factorial equation recommendation were used within ad libitum-fed corn silage diets (CS) arid limit-fed chopped high-moisture ear corn (HMEC) diets. The objective was to determine if optimum dietary crude protein levels differed between these two basal diets when fed at similar levels of a net energy of gain. By design of the experiment, daily dry matter intake of HMEC diets was lower than CS diets (P<.001). ADG was similar across basal diets and feed conversion was improved (P<.001) with HMEC diets. Dietary crude protein level did not affect ADG. Quadratic decreases in the protein efficiency ratio occurred as dietary crude protein Level increased (P<.01). Plasma urea N (PUN) levels were higher in calves fed HMEC diets (P<.05) arid increased quadratically with increasing dietary crude protein level on day 56 (P<.05). This study suggests the NRC factorial equation estimates the gram daily crude protein requirement and can be used without modification to predict dietary crude protein needs of limit-fed feeder calves.
Optimun Levels Of Dietary Crude Protein And Monensin For Steer Calves On Limit-Fed, High Concentrate Diets, M.L. Sip, R.H. Pritchard, M.A. Robbins
Optimun Levels Of Dietary Crude Protein And Monensin For Steer Calves On Limit-Fed, High Concentrate Diets, M.L. Sip, R.H. Pritchard, M.A. Robbins
South Dakota Beef Report, 1987
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 …