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 HighWire Citing Articles via Google Scholar Google Scholar Articles by Maxson, P. F. Articles by Mahan, D. C. Search for Related Content PubMed PubMed Citation Articles by Maxson, P. F. Articles by Mahan, D. C.

Dietary Calcium and Phosphorus Levels for Growing Swine from 18 to 57 Kilograms Body Weight^1,2,

The Ohio Agricultural Research and Development Center and and The Ohio State University, Wooster 44691

Abstract

A randomized complete block design experiment was conducted using 408 crossbred pigs to evaluate the effects of six dietary Ca/P levels for growing swine (18 to 57 kg). Total dietary P levels ranged from .40 to .90% in .1% intervals with Ca concurrently increased at a 1.3:1 ratio in a 16% protein corn-soybean meal diet. Dicalcium phosphate and limestone were the source of inorganic Ca and P. For the overall trial, daily gain and feed intake improved as dietary Ca/P increased to an approximate level of .65/.50%. An inverse relationship occurred between serum Ca and P, with serum Ca declining and P increasing at the lower mineral levels. Femur, humerus, rib, metatarsal and metacarpal ash content increased quadratically (P<.01) as dietary Ca/P increased with suggested dietary breakpoint inflections of .90% Ca and .70% P at 40 kg, and at .72/.55% levels at 57 kg body weight. Percentage ash of the head portion of the bone was lower than the shaft section. Bone shaft thickness and bending moments for metatarsals and metacarpals increased as dietary Ca/P levels increased, with higher values and higher dietary inflection points at 57 than at 40 kg body weight. Bone length was not influenced by dietary Ca/P level, but fat-free dried bone weight was, resulting in higher total bone ash and organic weight as Ca/P level increased.

¹ Approved for publication as Journal Article 27-82 from The Ohio Agr. Res. and Develop. Center and The Ohio State Univ., Wooster.

² Appreciation is expressed to Dr. F. L. Herum for his help with the collection of breaking strength data and to D. Hickman and M. Roof for technical assistance with laboratory analyses.

³ Dept. of Anim. Sci., The Ohio Agr. Res. and Develop. Center, Wooster, OH 44691.

This article has been cited by other articles:

				D. T. Shaw, D. W. Rozeboom, G. M. Hill, M. W. Orth, D. S. Rosenstein, and J. E. Link Impact of supplement withdrawal and wheat middling inclusion on bone metabolism, bone strength, and the incidence of bone fractures occurring at slaughter in pigs J Anim Sci, May 1, 2006; 84(5): 1138 - 1146. [Abstract] [Full Text] [PDF]