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Journal of Animal Science, Vol 68, 186-192, Copyright © 1990 by American Society of Animal Science

Evaluation of Condensed Distillers' Solubles as an Energy Source for Finishing Cattle

S. R. Rust 1, J. R. Newbold 1, and K. W. Metz 1

1 Michigan State University, East Lansing 48824

Sixteen individually fed Holstein steers were used to determine the ME value of condensed (7.56% DM) distillers’ solubles (CDS) in a 90% concentrate diet. Treatments included the basal diet plus either: 1) free choice water (control), 2) free choice water and 7.27 kg wet CDSM, 3) free choice water plus 7.27 kg wet CDS/d soaked on the grain portion of the diet or 4) free choice wet CDS (no water). Behavior of cattle was monitored every 5 min for 24 h on d 53 and 123 of the 124-d trial to determine differences in time spent eating, drinking, ruminating and resting. Cattle allowed free choice CDS converted feed to gain more efficiently (P < .05), resulting in a greater calculated ME content of the diet (P < .05) than cattle fed the control diet alone. Calculation by difference provided a ME value of 4.68 McaIAcg of CDS DM when fed as the only source of liquid. Condensed distillers’ solubles given as a liquid in limited quantities or mixed with the diet resulted in diet ME values similar to the control diet. Cattle fed CDS as the only source of liquid had lower (P < .05) total moisture intakes than cattle in other treatments. Cattle fed CDS soaked onto the grain portion of the diet spent 30 min/d less eating, drinking and ruminating. If used as a replacement for water, CDS intakes as high as 20% of the diet DM can be attained without deleterious effects on cattle performance.

Key Words: Beef Cattle • Distillers' Solubles • Feed Conversion Efficiency • Ingestion

Submitted on January 30, 1989
Accepted on May 4, 1989




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Copyright © 1990 by the American Society of Animal Science.