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Composition of Milk Produced by Red Dane and Red Poll Cattle ¹

Department of Animal Sciences, Purdue University, Lafayette, Indiana

ABSTRACT

Samples of milk were taken from 16 Red Dane, 25 Red Poll, 22 Holstein, and 24 Guernsey cows in University herds in the months of January, March, and May. Each sample was subjected to analysis for milk fat, protein, solids-not-fat, lactose, and ash content. Results of the analyses were subjected to analysis of variance and the Newman-Keuls sequential range test. Mean differences were considered to be significantly different when the difference attained a probability level of 0.01 or less.

Month and month by breed interaction effects were found to be nonsignificant sources of variation. In general, composition of milk from Red Dane cows tended to resemble that of Guernsey cows, while milk from Red Poll cows tended to resemble that from Holstein cows in composition.

¹ Department of Animal Sciences, Journal Paper no. 3137, Purdue University Agricultural Experiment Station, Lafayette, Indiana.

² Present address: Monsanto Company, 800 North Lindbergh Road, St. Louis, Missouri.