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Pelleted and Nonpelleted Cottonseed Hulls for Lactating Dairy Cows^{1 ,2,}

Animal Sciences Department, The University of Arizona, Tucson 85721

ABSTRACT

In two double switchback trials with 12 cows each, pelleted or nonpelleted cottonseed hulls were substituted for 10, 30, or 50% of the alfalfa hay cubes in a ration containing 50% alfalfa hay cubes and 50% high-energy concentrate. No differences due to diet were detected in total milk production, percents fat, protein, solids-not-fat, or fatty acids in milk. Digestibilities of protein, acid detergent fiber, and combustible energy but not fat were depressed progressively as cottonseed hulls increased in the diet.

¹ Journal paper 2648 of the Arizona Agriculture Experiment Station.

² Supported in part by a gift from Ranchers Cotton Oil, Fresno, CA.

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