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 Similar articles in PubMed Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via Google Scholar Google Scholar Articles by Franke, A. A. Articles by Osland, R. B. Search for Related Content PubMed PubMed Citation Articles by Franke, A. A. Articles by Osland, R. B.

Factors Affecting Iodine Concentration of Milk of Individual Cows

Department of Food Science and Technology, University of California at Davis 95616

J. C. Bruhn

Cooperative Extention, University of California at Davis

R. B. Osland

Department of Animal Science, California State University at Fresno 93710

ABSTRACT

Variations were measured of iodine concentrations of milk during complete lactations of 36 Holstein cows from the University of California herd in Davis and 24 Holstein and 12 Guernsey cows from the California State University herd in Fresno. At Davis no iodine was added to the concentrate, whereas at Fresno iodine as ethylene diamine dihydriodide was added to the concentrate at 4 ppm. At Davis, the mean milk iodine concentration was 166 µg/kg; at Fresno, the mean milk iodine concentration was 745 µg/kg. Holstein milk had higher iodine concentrations than Guernsey milk, 839 versus 554 µg/kg. Iodine concentrations of milk increased during lactation for all cows. At Davis, samples taken in the 1st mo of lactation had 105 µg/kg compared with 218 µg/kg in the 9th mo. At Fresno, samples taken in the 2nd wk of lactation had 183 µg/kg, compared with 1017 µg/kg in the 40th wk. Addition of as little as 4 ppm ethylene diamine dihydriodide to the concentrate throughout lactation will lead to greatly increased iodine concentrations in the milk, particularly in late lactation.