protein, forage, sheep
Twenty-four crossbred wethers (88 ± .44 Ib) were utilized to determine optimal level of dietary CP when corn gluten meal (CGM) and soybean meal (SBM) based supplements were fed alternate days. Diets were arranged in a 2 x 3 factorial design with SBM and CGM fed at 8, 9 or 10% dietary CP. Supplements were top dressed on ground corn stalks at a rate of two times the daily required amount (19.78% DM basis). The collection term consisted of an 8-day total feces and urine collection. DM1 and DDMl were improved (P<.01) when CGM was fed and as dietary CP was increased by either supplement. Dry matter digestibility (DMD) decreased (P<.05) as dietary CP level increased. Neutral detergent fiber digestibility (NDFD) did not differ (P>.05) for protein source or dietary CP level. Nitrogen digestibility (ND) increased (P<.05) with increasing dietary CP level. Nitrogen retention (NR) was improved by CGM and increasing dietary CP level and an interaction occurred (P< .10) between protein source and dietary CP level. Increased NR on CGM diets suggests providing ruminal escape N sources is beneficial when feeding CP supplements on alternate days.
Number of Pages
South Dakota State University
Copyright © 1991 South Dakota State University.
Collins, R. M. and Pritchard, R. H., "Alternate Day Protein Supplementation of Corn Stalk Based Diets with High and Low Ruminal Escape Protein Sources" (1991). South Dakota Beef Report, 1991. 13.