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The Effect of Prepartum Milking upon the Quantity of Milk Produced during the Subsequent Lactation¹

Department of Dairy Industry, Montana Agricultural Experiment Station, Bozeman

ABSTRACT

Of 47 Holstein and Jersey cows and heifers used in a prepartum milking experiment 33 completed 305 days of lactation following the experiment. The average amount of fat-correeted milk produced by 13 prepartum milked Holsteins was 13,960 ± 2,111 lb., compared with an average of 14,362 ± 3,754 lb. produced by five Holsteins that were not milked prepartum. The average amount of fat-corrected milk produced by 10 prepartum milked Jerseys was 9,529 ± 1,840 lb., compared to the average of 11,111 ± 814 lb. produced by five Jerseys that were not milked prepartum. When the data were analyzed by analysis of variance, the differences were not found to be significant. It was concluded that, under the conditions of this experiment, prepartum milking did not result in an increased quantity of milk produced in the lactation which followed prepartum milking.

¹ Contribution from Montana State College, Agricultural Experiment Station. Paper No. 302 Journal Series.