Effects of increasing dietary lysine on growth performance of pigs fed ractopamine HCl (paylean®)

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dc.contributor.author Neill, C.R.
dc.contributor.author Hastad, C.W.
dc.contributor.author Usry, J.L.
dc.contributor.author Tokach, Michael D.
dc.contributor.author Goodband, Robert D.
dc.contributor.author Nelssen, Jim L.
dc.contributor.author DeRouchey, Joel M.
dc.contributor.author Dritz, Steven S.
dc.date.accessioned 2009-10-29T18:32:17Z
dc.date.available 2009-10-29T18:32:17Z
dc.date.issued 2009-10-29T18:32:17Z
dc.identifier.uri http://hdl.handle.net/2097/1984
dc.description Swine research, 2005 is known as Swine day, 2005 en
dc.description.abstract A total of 919 gilts (PIC L337 × C22) were used in a 21-d trial conducted in a commercial research facility to determine growth and carcass effects of ractopamine HCl (Paylean®; 6.5 g/ton) and different levels of lysine. The diets were formulated to contain 0.75, 0.85, 0.95, 1.05, 1.15, and 1.25% true ileal digestible (TID) lysine to determine the lysine requirement for pigs fed ractopamine. These TID lysine levels correspond to 0.86, 0.97, 1.08, 1.19, 1.29, and 1.40% total lysine. From d 0 to 14, pigs fed 1.05% TID lysine had the greatest improvement in ADG and F/G. In the overall (d 0 to 21) data, however, pigs fed 1.15% TID lysine had the greatest improvement in ADG and F/G. Average daily gain increased (linear, P<0.005), whereas there were no differences in ADFI (P>0.05). Feed efficiency also improved (linear, P<0.005; quadratic P<0.07). Although the ADG and F/G responses were linear, there was very little improvement observed beyond 1.15% TID lysine. Percentage lean increased (linear, P<0.03) and FFLI tended to increase (linear, P<0.07) with increasing levels of TID lysine. The lean premium increased (linear, P<0.05) and backfat tended (linear, P<0.08) to improve, but other carcass criteria were not affected. Therefore, pigs fed ractopamine required between 1.05 and 1.15% TID lysine (1.19 to 1.29% total lysine) to maximize growth performance. en_US
dc.publisher Kansas State University. Agricultural Experiment Station and Cooperative Extension Service en_US
dc.relation.isPartOf Swine day, 2005 en_US
dc.relation.isPartOf Summary Publication of Report of Progress (Kansas State University. Agricultural Experiment Station and Cooperative Extension Service); 964 en_US
dc.relation.isPartOf Kansas Agricultural Experiment Station contribution; no. 06-63-S en_US
dc.subject Carcass parameters en_US
dc.subject Lysine en_US
dc.subject Paylean en_US
dc.subject Swine en_US
dc.title Effects of increasing dietary lysine on growth performance of pigs fed ractopamine HCl (paylean®) en_US
dc.type Conference paper en_US
dc.date.published 2005 en_US
dc.citation.epage 163 en_US
dc.citation.spage 160 en_US
dc.description.conference Swine Day, 2005, Kansas State University, Manhattan, KS, 2005 en_US
dc.contributor.authoreid dritz en_US
dc.contributor.authoreid mtokach en_US
dc.contributor.authoreid goodband en_US
dc.contributor.authoreid jnelssen en_US
dc.contributor.authoreid jderouch en_US


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