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Abstract
The starch in waxy corn hybrids is 100% amylopectin which is more digestible than that of normal corn hybrids; the production response to feeding silage produced from these hybrids has been inconsistent. Brown midrib corn varieties have lower lignin concentrations and have been shown to support higher DMI and milk yield. The objective of this study was to evaluate the nutrient intake and milk production response of lactating dairy cows fed diets based on corn silage from a normal, brown midrib, or waxy corn hybrid. No difference was observed in DMI among treatments. Milk yield was highest for cows fed BMR compared with WAXY but similar to CONTROL. Milk fat percentage tended to be lower for cows fed CONTROL compared with BMR or WAXY. Milk protein percentage tended to be lower for cows fed CONTROL compared with WAXY but similar to BMR.