J. Anim Sci.
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J. Anim Sci. 1973. 36:516-521.
© 1973 American Society of Animal Science
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Influence of Pelleting Swine Diets on Metabolizable Energy, Growth and Carcass Characteristics1

D. M. Baird

Georgia Station, Experiment 30212

Abstract

TWO feeding trials were conducted using a corn-soybean base diet fed as meal or as pellets to 120 Yorkshire pigs from weaning to market weight of about 100 kilograms. Digestion and metabolism studies were conducted to determine the effect of physical form of diet on its apparent utilization.

Pelleting significantly (P<.05) improved feedlot gains by 4.6%, reduced daily feed intake by an average of 3.6%, and significantly (P<.01) improved feed conversion by 7.8%.

Carcasses tended to have a lower percent of lean cuts when the pelleted diet was fed, however, this difference was not statistically significant.

Pelleting had no significant effect upon apparent digestibility of dry matter, crude protein, crude fiber or gross energy. The meal diet averaged slightly higher than the pelleted diet in nitrogen retention. Apparent digestion of ether extract was significantly (P<.01) higher for the pelleted diet while the apparent digestion of NFE was significantly (P<.05) higher for the meal diet.

Digestible and metabolizable energy values, uncorrected and corrected for nitrogen retention, were significantly higher for pigs receiving the meal vs. pelleted diet. There was no significant difference in the metabolism of the gross or digestible energy content as affected by diet form.

Sex and season had larger effects on performance and carcass characteristics than the physical form of the diet.

Footnotes

1 This research supported in part by a grant from Con Agra, Omaha, Nebraska 68131.






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Copyright © 1973 by the American Society of Animal Science.