Corn Distillers Dried Grains Versus Soybean Meal in Lactation Diets

The responses to distillers dried grains were compared with soybean meal using 86 Holstein cows. Diet DM contained 50% ammoniated corn silage and 50% concentrate: negative control (urea), 14.5% C P soybean meal test diet, 14.5% CP, distillers dried grains with solubles test diet;14.5% CP; soybean meal positive control, 18% C P and distillers dried grains with solubles positive control, 18% CP. Daily intake was higher (25.1 vs.