J. Anim Sci.
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J. Anim Sci. 1978. 46:161-166.
© 1978 American Society of Animal Science
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Replacing Soy Protein in Swine Diets with High-Protein Barley and Amino Acids1

C. W. Newman, A. M. El-Negoumy and R. F. Eslick2 ,3,

Montana State University, Bozeman 59715

Abstract

The feasibility of replacing soybean meal in barley-soy swine diets with high-protein barley cultivars and amino acids was tested in two feeding experiments. Diets were prepared with low-protein Unitan (experiment 1) and Glacier (experiment 2) barleys blended with high-protein Hiproly and Hiproly Normal barleys plus L-lysine and DL-methionine. Control diets were formulated with the low-protein barleys and soybean meal. In experiment 1, the barley and amino acid mixtures produced faster gains (P<.05) than the control diet in growing pigs from 25 to 50 kg and for the total feeding period of 25 to 95 kilograms. In experiment 2, no difference was noted in gains due to diet treatment. Feed efficiency was not altered (P>.05) by diet in either experiment. Small differences (P<.05) were observed in the carcass percentages of ham and lean cuts in experiment 1 in favor of pigs fed the control diet. Other carcass measurements were not altered (P>.05) in experiments 1 or 2. Considerable saving of soybean meal was accomplished with the use of high-protein barleys in diet mixtures for growing-finishing pigs.

Footnotes

1 Published with the approval of the Director of the Agricultural Experiment Station Journal Series No. 761.

2 The authors wish to thank Dr. E. P. Smith for statistical analysis; Shirley Gerhardt, Dana Leininger and Nancy Roth for laboratory analysis; and Frankie Larson for manuscript preparation.

3 This research was made possible in part by U.S. AID contract ta-C-1094.






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Copyright © 1978 by the American Society of Animal Science.