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 Gullickson, T. W. Articles by Olson, F. C. Search for Related Content PubMed Articles by Gullickson, T. W. Articles by Olson, F. C.

Defluorinated Rock Phosphate as a Phosphorus Supplement to the Rations of Dairy Cattle¹

Minnesota Agricultural Experiment Station, St. Paul, Minnesota

ABSTRACT

A defluorinated rock phosphate was compared with steamed bone meal in its ability to serve as a satisfactory supplement to phosphorus-deficient rations of dairy cattle. Four grade Holstein heifers about 21 months of age were used. They were fed similar phosphorus-deficient basal rations during the 17-months period of the experiment. During the last eleven months two of them were fed steamed bone meal as a supplement to their rations; the other two received equivalent additions of phosphorus from a defluorinated rock phosphate product. Total phosphorus intakes were kept slightly below the requirements of each animal.

Under the conditions of the experiment no significant difference was observed between defluorinated rock phosphate and steamed bone meal in availability of their phosphorus to dairy cattle. Animals fed the bone meal made slightly greater gains in weight. No difference was noted in the pala-tability of the two supplements as fed.

¹ Published with the approval of the Director as Paper No. 2271, Scientific Journal Series, Minnesota Agricultural Experiment Station.

² Resigned July 1, 1945.