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Plant vs. Animal Protein as a Source of Supplemental Protein for the Gilt¹

Nebraska Agriculture Experiment Station, Lincoln^,3

Abstract

Fifty-four crossbred gilts were fed diets containing 0, 5 and 10% meat and bone scraps (MBS) to determine the value for swine reproduction of replacing part of the supplemental protein in a vitamin-fortified all-plant diet (corn-soybean meal diet with added B₁₂) with protein of animal origin.

The 0 and 5% MBS diets supported more rapid gains (P<.05) during the 16-week gain test than the 10% MBS diet. No treatment differences were observed, however, for any of the reproductive traits measured; age at puberty, ovulation rate at second estrus, embryo survival and litter size at 26 to 28 days of gestation were not improved by substituting animal protein for part of the supplemental protein of plant origin.

¹ Published with the approval of the director of the Nebraska Agriculture Experiment Station as Paper No. 1966, Journal Series.

² Present address: Department of Animal Science, Agriculture Extension Service, Texas A & M University, College Station.

³ Department of Animal Science, University of Nebaska, Lincoln. Acknowledgement is made to P. F. Cunningham et al. for assistance in caring for the animals.