J. Anim Sci.
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J. Anim Sci. 1975. 40:1063-1069.
© 1975 American Society of Animal Science
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Chemically Preserved High-Moisture Corns in Diets for Growing-Finishing Swine1

P. B. Lynch2, G. E. Hall3, L. D. Hill4, E. E. Hatfield5 and A. H. Jensen5

Illinois Agricultural Experiment Station, Urbana 61801

Abstract

Five trials were conducted to evaluate high-moisture corns treated with chemical preservatives in diets for growing and finishing swine. Propionic: acetic acid mixtures (80:20 or 60:40), propionic acid, isobutyric acid, methylene bis propionate and ammonia were applied to high-moisture corn at time of harvest, and were stored in concrete-floor wooden bins or concrete silos. Nontreated high-moisture corn was stored in sealed silos and portions of the corn were dried at harvest time and stored in grain bins. Propionic acid (.82 or 1.2% by weight), mixtures of propionic-acetic (1.2%), isobutyric acid (1.5%) and methylene bis propionate (.80%) were effective preservatives during the periods studied (October to May). Ammonium hydroxide, applied at a level of .45% ammonia equivalent, was not as effective as the other compounds. However, all corns, whether in mixed diets or fed free-choice with a supplement, were readily consumed by the pigs. Rates of gain and gain/feed (dry matter basis) were similar on all high-moisture diets, which were equal to or better than dry corn diets. Carotene and vitamin E levels of high-moisture corn treated with 1.2% propionic:acetic acids mixture (60:40) were markedly lower after 20 weeks' storage than non-treated samples.

Footnotes

1 This research was supported in part by grants from Celanese Chemical Co., Corpus Christi, Texas; Moorman Mfg. Co., Quincy, Illinois; and Chevron Chemical Co., Norwalk, Iowa.

2 Present address: The Agricultural Institute, Moorepark Fermoy Co. Cork, Ireland.

3 Present address: The Andersons, Maumee, Ohio.

4 Department of Agricultural Economics.

5 Department of Animal Science.






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Copyright © 1975 by the American Society of Animal Science.