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Complete Rations for Dairy Cattle. IX. Effects of Percent Ground Corrugated Boxes and Citrus Molasses Solubles-Soybean Millfeed Product on Milk Production and Ration Digestibility¹

Dairy Science Department, University of Florida, Gainesville 32611

ABSTRACT

Thirty-six lactating Holstein cows were allotted to complete rations of either 30% cottonseed hulls or 10, 20, and 30% ground corrugated boxes as sources of roughage. Within each roughage treatment a citrus molasses solubles-soybean millfeed product (SuperFerm) was compared with citrus pulp at either 0, 15, or 30%. Least squares means for dry matter intake as a percent of body weight, daily milk yield, and milk fat percent for cows consuming 30% cottonseed hulls and 10, 20, and 30% ground corrugated boxes were 4.50, 3.68, 3.78, 3.53 %; 23.0, 23.3, 23.1, 21.0 kg; and 3.8, 3.1, 3.5, and 3.6 %. Ground corrugated boxes were a satisfactory roughage replacement for cottonseed hulls at 20%. Milk fat percent for the 10% ground corrugated box ration and milk production for the 30% ground corrugated box ration were less than for other rations. Rations containing a mixture of 15% citrus pulp and 15% SuperFerm were consumed in greater amounts than the 0 and 30% SuperFerm rations. Rations containing SuperFerm produced no significant responses for milk yield, milk fat, or change in body weight.

Means for digestibility of organic matter (74.9 to 79.1%) with chromic oxide as an indicator did not differ; means for organic matter digestibility with the lignin ratio method were lower on cottonseed hulls (59.2%) than the intermediate 72.4 on the 30% ground corrugated box rations whereas those on the 10 and 20% ground corrugated box rations (81.9 and 80.4%) were highest.

¹ Florida Agricultural Experiment Station Journal Series No. 1817.

² Farmers Cooperative Exchange, Orlando, FL 32802.