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 Google Scholar Google Scholar Articles by Miller, R. W. Articles by Moore, L. A. Search for Related Content PubMed Articles by Miller, R. W. Articles by Moore, L. A.

Utilization of Corn Silage Carotene as Compared to Pelleted Alfalfa Hay Carotene by Holstein Steers^1,2,

University of Maryland and United States Department of Agriculture

Abstract

Liver biopsies and jugular blood samples were taken from 12 yearling Holstein steers and analyzed for carotene and vitamin A. On the basis of liver vitamin A concentrations, the animals were paired and fed rations consisting of grain and either corn silage or alfalfa hay pellets. Plasma and liver carotene and vitamin A concentrations determined 3 times during the 109-day experiment were adjusted for differences in carotene intake of the steers. Pellet-fed steers had higher adjusted plasma carotene and liver vitamin A concentrations than silage-fed steers. Adjusted plasma vitamin A values were higher for the silage-fed steers.

¹ Scientific. Article No. A1525. Contribution No. 4184 of the Maryland Agricultural Experiment Station. Data from a thesis presented by R. W. Miller in partial fulfillment of the requirements for the Ph.D. Degree, University of Maryland.

² The authors thank Dr. G. V. Richardson, Biometrical Services, ARS, for help with the statistical analyses of this experiment.

³ Dairy Cattle Research Branch, Animal Husbandry Research Division, Agricultural Research Service, Beltsville, Maryland 20705.

⁴ Department of Dairy Science, College Park, Maryland 20742.