J. Anim Sci.
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J. Anim Sci. 1977. 45:469-475.
© 1977 American Society of Animal Science
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Evaluation of a Bacterial SCP for Young Pigs and Rats1

Dean R. Zimmerman and Samuel B. Tegbe2

Iowa Agriculture and Home Economics Experiment Station, Ames, 50011

Abstract

Nitrogen digestibility and retention of a bacterial single cell protein (SCP) made by a batch process was evaluated with baby pigs. Apparent digestibility of SCP nitrogen was comparable to that of a combination of corn, soybean meal and dried whey. But nitrogen retained, as a percentage of apparent nitrogen digested, was less in pigs fed a diet in which all protein was supplied by SCP than in pigs fed either; a diet with corn, soybean meal and dried whey protein or a diet combining SCP with corn, soybean meal and dried whey. There was some feed refusal of the "all SCP" diet. In a second experiment, baby pigs fed either 12 or 20% protein diets containing corn and SCP gained weight at slower rates, consumed less feed and utilized feed less efficiently than pigs fed 12 or 20% protein diets containing corn, soybean meal and dried whey. In a third trial, SCP, or yeast RNA at concentrations equal to or twice that in the SCP diet, did not reduce feed intake or rate of gain of weanling rats. Allantoin levels of blood and urine increased, but did not reach abnormal levels in blood, in response to increases in diet nucleic acid concentration. Results obtained with this SCP product are not necessarily indicative of results to be expected with other SCP products.

Footnotes

1 Journal Paper No. J-8612 of the Iowa Agriculture and Home Economics Experiment Station, Ames. Project No. 2021.

2 Department of Animal Science






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Copyright © 1977 by the American Society of Animal Science.