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Comparisons of Pastures and Supplements for Growing-Fattening Pigs

University of Illinois^,2

Abstract

1. Growing-fattening pigs self-fed to 200 pounds required 5.5% more concentrates per 100 pounds of gain on bromegrass than on alfalfa pasture. The pigs on alfalfa pasture consumed 33 % less protein supplement and 13% less minerals per unit of gain and reached the final weight one week earlier.
   
2. Bromegrass-alfalfa pasture was fully equal to alfalfa pasture for self-fed pigs.
   
3. In comparisons within experiments on similar pastures, the rates of gain between groups of pigs differed slightly but not significantly when the following supplemental mixtures were self-fed free-choice with shelled yellow corn and minerals (parts by weight): (a) 100 tankage (60% crude protein) plus 100 expeller soybean oil meal; (b) 200 expeller soybean oil meal plus 100 alfalfa meal; (c) 100 expeller soybean oil meal plus 200 ground oats; (d) 100 meat and bone scraps plus 100
   

¹ Acknowledgment is made for the assistance of D. M. Baird, Assistant in Animal Science and of D. E. Becker, R. F. Van Poucke, H. D. Wallace and G. W. Sherritt, formerly Assistants in Animal Science, and of R. H. McDade, Chief Swine Herdsman, and his associates. Acknowledgment is also made to F. M. Crawford, Agricultural Engineering Department, for help in conducting the night light test.

² Animal Science Department, Urbana, Illinois. These investigations were supported, in part, by the donation of funds and products to the University of Illinois by the A. E. Staley Manufacturing Company, Dacatur, Illinois, Central Soya Company, Fort Wayne, Indiana, and Hiram Walker and Sons, Inc., Peoria, Illinois.