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


     

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 Weeden, T. L.
Right arrow Articles by Richert, B. T.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Weeden, T. L.
Right arrow Articles by Richert, B. T.

Journal of Animal Science, Vol 71, Issue 10 2683-2692, Copyright © 1993 by American Society of Animal Science

JOURNAL ARTICLE

The interrelationship of porcine somatotropin administration and dietary phosphorus on growth performance and bone properties in developing gilts

T. L. Weeden, J. L. Nelssen, R. D. Goodband, J. A. Hansen, K. G. Friesen and B. T. Richert
Department of Animal Sciences and Industry, Kansas State University, Manhattan 66506-0201.

Seventy-two gilts (initial weight = 57.9 kg) were used to determine the interrelationship of porcine somatotropin (pST) administration and dietary P on growth performance of finishing gilts (58 to 106 kg) and the effect on bone mechanical properties and mineralization for a 35-d postfinishing phase after withdrawal of pST administration. Gilts were injected daily with placebo (control) or 4 mg of pST and fed .4, .6, or .8% P in the finishing phase. Administration of pST increased ADG and G/F (P < .01) and decreased ADFI (P < .01) during the finishing phase. Increasing dietary P resulted in increased (quadratic, P < .04) ADG from d 0 to 28 of the finishing phase; however, dietary P had no effect (P > .18) on ADG, G/F, or ADFI for the overall finishing phase. When each block weight averaged 106 kg, half the gilts were slaughtered and the first rib, femur, and third and fourth metacarpals were collected. Stress, modulus of elasticity, and ash content of rib, femur, and metacarpals were reduced (P < .06) and femur wall thickness was increased (P < .01) in pST-treated gilts. Increasing dietary P increased (linear, P < .05) bending moment, stress, and ash content for all bones collected, with the exception of metacarpal stress, which was not affected (P > .22). The remaining 36 gilts were individually fed 1.8 kg/d of a common diet to assure a P intake of 22.8 g/d for the 35-d postfinishing phase. Gilts that received higher levels of dietary P during the finishing phase had increased (linear, P < .06) bending moment and ash content for the rib and femur; rib stress, and femur wall thickness were also increased after the postfinishing phase. From d 0 to 28 of the finishing phase, pST-treated gilts required a diet with > .4% P (10.3 g/d P) to maximize growth performance. However, a diet with .4% P (12.44 and 10.66 g/d P, control and pST-treated, respectively) was adequate for growth performance during the overall finishing phase (56 to 106 kg).(ABSTRACT TRUNCATED AT 400 WORDS)




HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
Copyright © 1993 by the American Society of Animal Science.