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Effect Of Supplement Crude Protein Source And Dietary Crude Protein Levels On Feedlot Performance Of Yearling Steers, R. H. Pritchard
Effect Of Supplement Crude Protein Source And Dietary Crude Protein Levels On Feedlot Performance Of Yearling Steers, R. H. Pritchard
South Dakota Beef Report, 1994
The effect of crude protein level and source on production rates of yearling steers was evaluated during an 88-day finishing period. The overall average daily gain of 240 steers implanted with Revalor was 4.35 Ib. Diets were formulated to contain 1 1.25 and 13.5% crude protein. Protein sources included urea, soybean meal, an isonitrogenous blend of blood mealcorn gluten meal (BM-CGM) and dried distillers grains with solubles (DDGS). Increasing dietary crude protein from 11.5 to 13.3% with all urea supplements depressed (P<.05) dry matter intake without compromising average daily gain or feed efficiency. Feeding soybean meal in 1 1 .I % crude protein diets improved the energetic efficiency of steers. The BM-CGM supplement depressed (P<.051 dry matter intake and average daily gain when compared to the 11.5% crude protein soybean meal diet. The 13.6% crude protein diet containing 11 % DDGS and urea supported performance comparable to the 11.1 % soybean meal diet at a lower cost.