J. Anim Sci.
HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
QUICK SEARCH:   [advanced]


     

J. Anim Sci. 1975. 40:864-870.
© 1975 American Society of Animal Science
This Article
Right arrow Full Text (PDF)
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Services
Right arrow Similar articles in this journal
Right arrow Similar articles in PubMed
Right arrow Alert me to new issues of the journal
Right arrow Download to citation manager
Right arrow reprints & permissions
Citing Articles
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Bayley, H. S.
Right arrow Articles by Thomson, R. G.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Bayley, H. S.
Right arrow Articles by Thomson, R. G.

Influence of Dietary Phosphorus Level on Growth and Bone Development in Boars and Gilts

H. S. Bayley2, D. Arthur2, G. H. Bowman3, J. Pos4 and R. G. Thomson5

University of Guelph, Guelph, Ontario, Canada

Abstract

The dietary phosphorus level supporting maximum growth rate was not greater than .40% for gilts, but for boars was between .4 and .6%. However, for maximum development of the radius and femur, gilts required more than .4% and boars more than .6%. In the First experiment a corn-soy bean meal diet containing .9% calcium and .32% phosphorus was supplemented with phosphorus to .36, .40 and .44%. Three pens of four boars received each diet from weaning to 90 kilograms. Growth increased from 630 to 822g/day when the phosphorus level was increased from .32 to .40%, but bone development responded to all three increments of phosphorus. In the second experiment a diet containing .8% calcium and .4% phosphorus was supplemented with phosphorus to .6, .8 and 1.0%. Three pens of eight gilts and three pens of eight boars received each diet. Increasing the phosphorus level from .4 to .6% improved the gain of the boars from 798 to 875g/day, but there was no response for the gilts. The force required to break the femurs responded in the same way, increasing for the first dietary phosphorus increment for the boars, but not changing significantly for the gilts.

Analyses of 10 batches of each diet showed the extent of between and within mix variation encountered in nutritional experiments.

Footnotes

1 This research was supported by the Ontario Ministry of Agriculture and Food.

2 Department of Nutrition, College of Biological Science.

3 Department of Animal and Poultry Science, Ontario Agricultural College.

4 School of Agricultural Engineering, Ontario Agricultural College.

5 Department of Pathology, Ontario Veterinary College.






HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
Copyright © 1975 by the American Society of Animal Science.