J. Anim Sci.
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J. Anim Sci. 1965. 24:203-208.
© 1965 American Society of Animal Science
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Effect of Level and Source of Protein on Reproductive Performance of Swine

R. H. Rippel1, O. G. Rasmussen2, A. H. Jensen, H. W. Norton and D. E. Becker

Illinois Agricultural Experiment Station, Urbana

Abstract

A study of 155 animals was made to evaluate the influence of various levels and sources of protein fed during the last half of pregnancy on reproductive performance of female swine.

Neither the level nor the source of protein influenced litter size, number of live pigs farrowed, birth weight of live pigs or pig livability. Gilt, but not sow, gestation gain was inferior at 5% protein compared to gain at 16% protein. Litter weight at 2 weeks post-partum was satisfactory when the sows were fed a 16% protein diet during gestation and lactation. Litters from gilts fed 5% protein during gestation and 16% protein during lactation gained faster than litters from gilts fed 5% protein diets during both phases.

A 97% corn diet supported parturition performance equivalent to that of a 16% protein, corn-soybean meal diet. However, the corn diet did not support gestation gain during the winter months or litter gain the first 2 weeks of lactation equal to that of gilts fed 16% protein.

Footnotes

1 Present address: Abbott Laboratories, North Chicago, Illinois.

2 Present address: Armour and Company, Grocery Products Division, Bellwood, Illinois.




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