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Crude Casein and Meat Solubles in Milk Replacers^{1 ,2,}

Department of Animal Science, University of Minnesota, St. Paul 55108

ABSTRACT

Two groups of six calves each were used in a 3-wk trial to determine the digestibility and nitrogen retention of milk replacers containing 8% casein or 8% meat solubles. Each calf was fed 227 g milk replacer reconstituted with 1.8 kg water twice daily. Dry matter digestibilities (%), nitrogen digestibilities (%), and nitrogen retentions (%) for wk 1, 2, and 3 were: (casein) 89.8, 78.0, 33.0; 93.3, 85.7, 40.4; 94.2, 87.2, 42.0; and (meat solubles) 80.3, 54.8, —10.4; 87.0, 65.5, 7.4; 91.5, 72.0, 23.2. Milk replacer that contained casein was higher in essential amino acids with the exception of arginine and contained approximately 35% more total essential amino acids than replacer with meat solubles.

¹ Scientific Journal Series Paper No. 9562, Minnesota Agricultural Experiment Station, St. Paul 55108.

² Supported in part by Milk Specialties, Inc., Dundee, IL 60118.

³ Milk Specialties Company, Box 278, Dundee, IL 60118.