J. Anim Sci.
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J. Anim Sci. 1985. 61:1460-1466.
© 1985 American Society of Animal Science
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Reproductive Performance of Sows Fed Elevated Calcium and Phosphorus Levels During Growth and Development

E. T. Kornegay1, B. G. Diggs2, O. M. Hale3, D. L. Handlin4, J. P. Hitchcock5 and R. A. Barczewski1

S-145 Committee on Nutritional Systems for Swine to Increase Reproductive Efficiency

Abstract

A cooperative regional study (S-145) involving 586 farrowings was conducted at five state experiment stations (Georgia, Mississippi, South Carolina, Tennessee and Virginia) to determine the influence of feeding elevated Ca and P levels during growth and development on general reproductive efficiency and longevity of confined, housed females kept for three consecutive parities. Two dietary Ca and P levels (100 vs 150% of 1979 NRC-recommended amounts) were fed ad libitum from weaning to 100 kg. A diet containing .8% Ca and .6% P was limit-fed to all gilts and to all sows during gestation and lactation. Growth rate and feed efficiency from weaning to 100 kg were similar (P>.10) for gilts fed 100 vs 150% Ca and P levels. A similar total number of litters (292 vs 294) Was farrowed by each previous treatment group. From the previously-fed-100% Ca and P group, 78 and 65% of the sows that completed the first parity completed the second and third farrowing, respectively. Similarly, from the previously-fed-150% Ca and P group, 81 and 57% completed the second and third farrowing, respectively. Across all locations. total pigs bom, live pigs born, stillborns, birth weight, number and weight of pigs at 21 d of age, sow weight at 110 d of gestation and at weaning did not differ (P>.10) between the two previously fed sow groups. There were significant location and farrowing effects, but most two-way interactions with Ca and P levels were not significant. These results suggest that feeding higher-than-NRC-suggested levels of Ca and P to gilts during growth and development does not improve their subsequent reproductive performance and longevity when housed in confinement and limit-fed a gestation-lactation diet containing .8% Ca and .6% P for multiple farrowings.

Footnotes

1 Virginia Polytechnic Institute and State Univ., Blacksburg, 24061.

2 Mississippi State Univ., Starkville, 39762.

3 The Univ. of Georgia, Tifton, 31793,

4 Clemson Univ., Clemson, SC 29631.

5 Univ. of Tennessee, Knoxville, 37916,






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Copyright © 1985 by the American Society of Animal Science.