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Journal of Dairy Science Vol. 50 No. 11 1787-1791
© 1967 by American Dairy Science Association ®
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Effect of Eliminating Machine Stripping of Dairy Cows on Milk Production, Residual Milk, and Mastitis1

K. R. Goff and G. H. Schmidt

Department of Animal Science, Cornell University, Ithaca, New York

ABSTRACT

Eighteen cows of three breeds were divided into pairs according to breed and previous milk production. One member of each pair was milked and machine-stripped in the usual manner. The udder of the second member was not handled after machine application, nor was pressure exerted on the teat cups. The machine was removed when milk flow stopped, as observed through a plastic sight glass attached to the milker pail lid. The treatments were reversed at the end of four weeks and again at the end of eight weeks.

No significant differences were found in the daily milk production or the milk fat percentage (P > 0.05) between the two treatments. A negative regression coefficient (P < 0.10) of treatment differences (daily milk yield during stripping minus that during nonstripping) on daily milk production was found for individual cows, indicating that lower producing cows had a greater reduction in production due to the elimination of stripping than higher producers. The percentage residual milk was significantly higher (P < 0.05) for cows not stripped than those stripped (14.0% vs. 12.8%). No differences in leucocyte or California Mastitis Test scores were noted between treatments.

FOOTNOTES

1 This paper is part of a thesis submitted by the senior author in partial fulfillment of the requirements for the M.S. degree at Cornell University.






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Copyright © 1967 by the American Dairy Science Association ®.