HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Similar articles in this journal Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via Google Scholar Google Scholar Articles by Ludwin, I. Search for Related Content PubMed Articles by Ludwin, I.

The Effect of Number of Daily Milkings upon Persistency of Milk Production

Washington, D. C.

Abstract

The effect of frequency of milking upon persistency of milk production was studied by selecting 364 Holstein-Friesian A.R. cows, each having 2 records meeting certain conditions. These cows were then paired so that the effect of age, individuality, and herd environment were balanced so far as possible. The prime variable affecting milk production remaining in this type of analysis is frequency of milking. It is concluded that:

1. Persistency measured by actual rate of decline (slope) is not affected by frequency of milking. If a proportional measure of persistency is used then persistency is increased by more frequent milking.
   
2. The decline in milk yield from the third to the ninth month is best considered a straight line relationship.
   

¹ The advice of Drs. G. E. Dickerson and L. J. Cole is greatly appreciated and counsel by Drs. J. Torrie and C. Eisenhart of the University of Wisconsin with regard to the statistical techniques used is also acknowledged.

These data were made available for study through the courtesy of the Holstein-Friesian Association of America. Every assistance possible was extended by Mr. H. W. Norton, Jr., Superintendent of the Advanced Registry.

The author is Statistical Analyst, Navy Department, Washington, D. C. (now on leave for military duty) and was formerly a graduate student at the University of Wisconsin.

This article has been cited by other articles:

				E. H. Wall and T. B. McFadden Use it or lose it: Enhancing milk production efficiency by frequent milking of dairy cows J Anim Sci, March 1, 2008; 86(13_suppl): 27 - 36. [Abstract] [Full Text] [PDF]

				E. H. Wall, H. M. Crawford, S. E. Ellis, G. E. Dahl, and T. B. McFadden Mammary Response to Exogenous Prolactin or Frequent Milking During Early Lactation in Dairy Cows J Dairy Sci, December 1, 2006; 89(12): 4640 - 4648. [Abstract] [Full Text] [PDF]