Reproductive management practices among Tulare, California, dairy herds. II. Analytical studies

P. Cowen, C. W. Schwabe, H. R. Rosenberg, Robert Bondurant, C. E. Franti, W. J. Goodger

Research output: Contribution to journalArticle

9 Scopus citations

Abstract

A series of analytical investigations using multivariate techniques assessed the relative importance of various reproductive management practices in explaining the variation seen among dairies in terms of milk production, days in milk at first service, average days open, services per conception and owner's perception of reproductive problems in their herds. Data were based on a census of all dairy operators in Tulare county, CA with a 93% response rate. Discriminant analysis was used to select an initial pool of management factors that were subsequently used in multiple logistic regression analysis. Use of a combination of signs for estrus detection and large herd sizes had a positive association with some measures of reproductive efficiency. A large number of dry cows, an increased percentage of purebred cows and the herdsman breeding had a negative association with some measures of reproductive efficiency. The use of prostaglandins for cows not showing estrus, veterinary post-partum examinations, maternity pens and an increased percentage of purebred cows were associated with an increased level of milk production. For the group of 10 owner-perceived problems, 27 management variables were found to be significantly associated with one of the owner-perceived problems.

Original languageEnglish (US)
Pages (from-to)101-111
Number of pages11
JournalPreventive Veterinary Medicine
Volume7
Issue number2
DOIs
StatePublished - Jan 1 1989

ASJC Scopus subject areas

  • Food Animals
  • Animal Science and Zoology

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