Influence of Substituting Two Types of Soybean Protein for Milk Protein on Gain and Utilization of Milk Replacers in Calves

摘要: Abstract Twenty-four male calves (8/treatment) were fed milk replacers containing 19% crude protein from: a) 100% protein; b) 66% modified soybean plus 34% c) heated flour as the only nutrients at 8, 9, 10, 11, 12, and 12% body weight from 1 to 8 wk of age, respectively. Milk resulted in faster gains improved feed efficiencies. Organic matter digestibilities for all protein, 5 age 90.8, 87.2, 85.3%; 82.6, 72.1, 64.1%, Xylose absorption performed on d 50 by oral dosing .5g D-xylose/kg weight, xylose disappearance 44 intravenous injection .25g showed 16% greater than or flour. Calves cleared blood. Two per treatment sacrificed electron microscopic evaluation intestinal tissue. Greater morphological variation size shape villi was observed within animals among treatments. These data suggest that superior performance compared with soy is related a digestibility absorptive capacity digested nutrients.