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Soybean Meal Versus Starea at Two Concentrations for Young Calves¹

Department of Dairy and Poultry Science, Kansas State University, Manhattan 66506

ABSTRACT

Starea, an expansion-processed mixture of grain and urea, was compared with soybean meal as a source of protein for young calves. Four rations, compared in growth and nitrogen balance trials, contained Starea or soybean meal at 15% (low) or 25% (high). From 7 to 12 wk of age average daily gains and feed consumed by 64 Holstein calves were (kg) 1.05 and 3.22 for soybean meal-low, .86 and 2.76 for Starea-low, 1.15 and 3.39 for soybean meal-high, and .85 and 2.91 for Starea-high. Nitrogen digestibilities and nitrogen balances were not significantly affected by protein source or amount.

¹ Contribution 871, Department of Dairy and Poultry Sciences, and 194, Department of Statistics, Kansas Agricultural Experiment Station, Manhattan.