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Interactive Effects of Diet Complexity, Zinc Source and Feed-grade Antibiotics on Weanling Pig Growth Performance

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Author(s): J.C. Woodworth | M.D. Tokach | J.L. Nelssen | R.D. Goodband | P.R.O. Quinn | T.M. Fakler

Journal: Journal of Animal and Veterinary Advances
ISSN 1680-5593

Volume: 4;
Issue: 7;
Start page: 688;
Date: 2005;
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Keywords: Antibiotic | Early-Weaned Pigs | growth | Zinc

ABSTRACT
Two trials were conducted to determine the effects of diet complexity, feed-grade antibiotic and zinc (Zn) source on weanling pig growth performance. In Exp. 1, 320 pigs (initially 4.42 ? 0.09 kg and 14 d of age) were allotted in a 2?2?2 factorial with main effects of diet complexity (simple or complex); added zinc oxide (ZnO; none or 3,000 ppm Zn from d 0 to 10 then 2,000 ppm from d 10 to 20); and feed-grade antibiotic (none or 55 mg neoterramycin/kg of diet). Experimental diets were fed from d 0 to 20 after weaning and then a common diet that contained no ZnO (other than provided in the trace mineral premix) or antibiotic was fed to all pigs from d 20 to 27. From d 0 to 10, a three-way interaction was observed (p
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