Effects of feeding copper and feed-grade antimicrobials on the growth performance of weanling pigs

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dc.contributor.author Amachawadi, R.G.
dc.contributor.author Shelton, N.W.
dc.contributor.author Tokach, Michael D.
dc.contributor.author Scott, Harvey Morgan
dc.contributor.author DeRouchey, Joel M.
dc.contributor.author Nagaraja, T. G.
dc.contributor.author Goodband, Robert D.
dc.contributor.author Nelssen, Jim L.
dc.contributor.author Dritz, Steven S.
dc.date.accessioned 2012-02-16T19:40:01Z
dc.date.available 2012-02-16T19:40:01Z
dc.date.issued 2012-02-16
dc.identifier.uri http://hdl.handle.net/2097/13478
dc.description.abstract A total of 240 weanling pigs (34 d of age with an average body weight of 17.1 lb) were used in a 35-d growth trial to compare the growth performance effects of copper (Cu) and feed-grade antimicrobials. The 6 dietary treatments were arranged in a 2 × 3 facto- rial with 2 added Cu levels (basal level of 16.5 ppm or basal + 125 ppm from copper sulfate) and 3 antimicrobial treatments including a control, chlortetracycline (CTC; Alpharma, Fort Lee, NJ) at 500 g/ton (10 mg/kg BW), and tylosin (Tylan; Elanco Animal Health, Greenfield, IN) at 100 g/ton. Each treatment had 8 pens with 5 pigs per pen. Treatments were allotted to pen in a randomized complete block design, with location within the barn serving as the blocking factor. Following the brief acclimatization period prior to starting the experiment (13 d), pigs were fed dietary treatments for 21 d followed by another 14 d on the control diet to examine any carryover effects. No significant copper × antimicrobial interactions were observed (P > 0.07) for any pig performance response. From d 0 to 21, pharmacological Cu tended to increase (P < 0.07) both ADG and ADFI compared with pigs provided basal levels of Cu. Dietary CTC inclusion increased (P < 0.01) ADG and tended to improve (P < 0.09) ADFI and F/G over pigs not fed diets with CTC. Dietary Tylan did not alter (P > 0.19) ADG, ADFI, or F/G compared with pigs provided the control diets. From d 21 to 35, pigs that previously had received pharmacological Cu tended to have lower (P < 0.06) ADG compared with those never receiving pharmacological Cu. Also, pigs previously receiving Tylan had lower (P < 0.01) ADG than those never receiving Tylan. For the overall trial (d 0 to 35), adding Cu for the first 21 d had no impact (P > 0.32) on ADG, ADFI, or F/G. Similarly, Tylan did not influence (P > 0.30) pig performance. The benefits of CTC during the first 21 d led to a tendency for increased (P < 0.06) ADG and ADFI compared with those not receiving CTC. Overall, pharmacological Cu and antimicrobials may offer performance advantages when incorporated in nursery pig diets; however, that advantage will not increase and may be lost after Cu and/or antimicrobials are removed from diet. en_US
dc.publisher Kansas State University. Agricultural Experiment Station and Cooperative Extension Service en_US
dc.relation.isPartOf Swine Day, 2011 en_US
dc.relation.isPartOf Kansas Agricultural Experiment Station contribution; no. 12-064-S en_US
dc.relation.isPartOf Report of progress (Kansas State University. Agricultural Experiment Station and Cooperative Extension Service); 1056 en_US
dc.subject Swine en_US
dc.subject Nursery pig en_US
dc.subject Antimicrobials en_US
dc.subject Copper en_US
dc.subject Growth promoters en_US
dc.title Effects of feeding copper and feed-grade antimicrobials on the growth performance of weanling pigs en_US
dc.type Conference paper en_US
dc.date.published 2011 en_US
dc.citation.epage 61 en_US
dc.citation.spage 57 en_US
dc.description.conference Swine Day, Manhattan, KS, November 17, 2011 en_US
dc.contributor.authoreid mtokach en_US
dc.contributor.authoreid hmscott en_US
dc.contributor.authoreid dritz en_US
dc.contributor.authoreid goodband en_US
dc.contributor.authoreid jderouch en_US
dc.contributor.authoreid jnelssen en_US
dc.contributor.authoreid tnagaraj en_US

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