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Effects of 1,3-Butanediol in Alleviating and Preventing Milk Fat Depression in Cows¹

Department of Animal Science, Iowa State University, Ames 50011

ABSTRACT

In Trial I of two trials to study long-term effects of adding 1,3-butanedi-ol to diets that cause milk fat depression in cows, 4% 1,3-butanediol was fed to three cows that were compared with four cows fed a fat-depressing diet for 6 mo. Trial II compared six cows fed 6% 1,3-butanediol for 3 mo with six cows fed a fat-depressing diet. The cows fed 1,3-butanediol did not show significant advantages in milk fat production for either trial. Milk protein tended to increase with high grain feeding, either with or without 1,3-butanediol. A third trial involved 12 cows in a 3-mo double reversal experiment to observe whether suddenly adding or deleting 6% 1,3-butanediol would cause rapid changes in milk fat production. Milk production and composition were similar in both dietary groups. Body weight gains were less in all three trials for cows fed 1,3-butanediol.

¹ Journal Paper No. J-793 3 of the Iowa Agriculture and Home Economics Experiment Station, Ames. Project No. 1812. 1,3-Butanediol was provided through the courtesy of the Celanese Chemical Co. The research was supported pardy by funds from Celanese and from the Iowa State University Research Foundation.

² International Minerals and Chemical Corp., Terre Haute, IN 47808.