The effects of two true-ileal-digestible lysine concentrations, Optipak®, ractopamine hcl (paylean®), and their combinations, on the growth performance and carcass characteristics of finishing pigs reared in commercial facility

K-REx Repository

Show simple item record

dc.contributor.author Bergstrom, J.R.
dc.contributor.author Nelssen, Jim L.
dc.contributor.author Tokach, Michael D.
dc.contributor.author DeRouchey, Joel M.
dc.contributor.author Goodband, Robert D.
dc.contributor.author Dritz, Steven S.
dc.date.accessioned 2009-10-20T13:42:16Z
dc.date.available 2009-10-20T13:42:16Z
dc.date.issued 2009-10-20T13:42:16Z
dc.identifier.uri http://hdl.handle.net/2097/1855
dc.description.abstract A total of 1,207 pigs (PIC, 337 × 1050) were used in a 28-d experiment in a commercial research barn to evaluate the effects of two true ileal digestible (TID) lysine concentrations, Optipak®, ractopamine HCl, and their combinations, on the growth performance and carcass characteristics of finishing pigs. There were 6 replicates per treatment (with the exception of one treatment that had 5), and 19 to 26 pigs per pen. Pigs were weighed at approximately 220 lb and allotted to six, corn-soybean meal-based dietary treatments. Four diets were formulated to 0.80% TID lysine: a control diet, the control diet with 5 lb/ton of Optipak®, the control diet with 4.5 g/ton of ractopamine HCl, or the control diet with both Optipak® and ractopamine HCl. The two remaining diets were formulated to 0.94% TID lysine and contained 4.5 g/ton of ractopamine HCl, with or without 5 lb/ton of Optipak®. The treatment structure provided for two 2 × 2 factorial arrangements of treatments. The first factorial utilized the four 0.80% TID lysine diets to evaluate the effects of Optipak® and ractopamine HCl. The second factorial utilized the four diets containing ractopamine HCl to evaluate the effects of TID lysine and Optipak®. Pigs fed diets containing ractopamine HCl had improved (P<0.04) ADG, F/G, and final weight. In the diets containing ractopamine HCl, ADFI tended (P<0.07) to be lower for pigs fed 0.94% TID lysine. There were no other differences in growth performance among the treatments. For carcass characteristics, plant live weight, hot carcass weight, and dressing percentage were improved (P<0.04) for pigs fed ractopamine HCl. Additionally, loin depth increased (P<0.03) when Optipak® was included in the diet. This experiment provides further evidence that ractopamine HCl improves late-finishing growth performance, hot carcass weight, and dressing percentage. Although Optipak® did not improve growth performance, it increased loin depth. The different responses to ractopamine HCl and Optipak® suggest that the incentives for justifying their use need to be evaluated independently. en_US
dc.publisher Kansas State University. Agricultural Experiment Station and Cooperative Extension Service en_US
dc.relation.isPartOf Kansas Agricultural Experiment Station contribution; no. 08-121-S en_US
dc.relation.isPartOf Swine day, 2007 en_US
dc.relation.isPartOf Report of progress (Kansas State University. Agricultural Experiment Station and Cooperative Extension Service); 985 en_US
dc.subject Swine en_US
dc.subject Amino acids en_US
dc.subject Feed ingredient en_US
dc.subject Lysine en_US
dc.subject ractopamine HCl en_US
dc.title The effects of two true-ileal-digestible lysine concentrations, Optipak®, ractopamine hcl (paylean®), and their combinations, on the growth performance and carcass characteristics of finishing pigs reared in commercial facility en_US
dc.type Conference paper en_US
dc.date.published 2007 en_US
dc.citation.epage 186 en_US
dc.citation.spage 181 en_US
dc.description.conference Swine Day, 2007, Kansas State University, Manhattan, KS, 2007 en_US
dc.contributor.authoreid mtokach en_US
dc.contributor.authoreid dritz en_US
dc.contributor.authoreid jnelssen en_US
dc.contributor.authoreid jderouch en_US
dc.contributor.authoreid goodband en_US


Files in this item

This item appears in the following Collection(s)

Show simple item record

Search K-REx


Advanced Search

Browse

My Account

Statistics








Center for the

Advancement of Digital

Scholarship

118 Hale Library

Manhattan KS 66506


(785) 532-7444

cads@k-state.edu