The optimal true-ileal-digestible lysine and total sulfur amino acid requirement for finishing pigs fed paylean®

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Show simple item record Frantz, N.Z. Tokach, Michael D. Goodband, Robert D. Nelssen, Jim L. DeRouchey, Joel M. Dritz, Steven S. 2009-10-29T18:28:59Z 2009-10-29T18:28:59Z 2009-10-29T18:28:59Z
dc.description.abstract A total of 1887 pigs (PIC 337 × C22; 213 lb initial BW) were used in a 28-d growth assay to simultaneously examine both the true-ileal-digestible (TID) lysine and TID total sulfur amino acid (TSAA) requirements. The objective was to determine the appropriate TID TSAA-to-lysine ratio in finishing pigs fed Paylean® (4.5 g/ton) to maximize growth performance and carcass composition. Four TID lysine (0.66. 0.79, 0.92, and 1.05%) and four TID TSAA (0.47, 0.52, 0.57, and 0.63%) concentrations were evaluated. The highest lysine and TSAA concentrations were combined in the same diet, and there were eleven or twelve replicate pens per treatment. The lysine treatments were formulated with a minimum TID TSAA to lysine ratio of 60%, and the TSAA diets were formulated with 1.05% TID lysine. No gender × treatment or treatment × week interactions were observed (P>0.13). Increasing TID lysine increased ADG (linear, P<0.01), with the greatest response at 0.92% TID lysine, but ADG (P>0.76) was not affected by increasing TID TSAA. This resulted in a TID TSAA-to-lysine ratio of not more than 51% for optimum ADG. Increasing TID lysine did not affect ADFI (P>0.60), but ADFI decreased (linear, P<0.04) with increasing TID TSAA. Increasing dietary TID lysine improved feed efficiency (F/G) (linear, P<0.01), and increasing TID TSAA tended to improve F/G (linear, P<0.09). Although the response was linear, the greatest improvement in F/G was observed as the TID TSAA increased from 0.47% to 0.52%, resulting in an optimum TID TSAA-to-lysine ratio of 57%. Regression analysis indicates that the maximum F/G response was obtained with a TID TSAA-to-lysine ratio of 58%. Increasing TID lysine had no effect on any carcass criteria (P>0.11), but increasing TID TSAA from 0.47 to 0.52% tended to improve fat-free lean (quadratic, P<0.10). No other carcass criteria were affected by increasing TID TSAA (P>0.10). In summary, a TID TSAA-to-lysine ratio of 58% optimizes growth performance of finishing pigs fed Paylean. en_US
dc.publisher Kansas State University. Agricultural Experiment Station and Cooperative Extension Service en_US
dc.relation.isPartOf Swine day, 2004 en_US
dc.relation.isPartOf Report of progress (Kansas State University. Agricultural Experiment Station and Cooperative Extension Service); 940 en_US
dc.relation.isPartOf Kansas Agricultural Experiment Station contribution ; no. 05-113-S en_US
dc.subject Finishing pigs en_US
dc.subject Lysine en_US
dc.subject Methionine en_US
dc.subject Paylean en_US
dc.subject Pigs en_US
dc.subject Sulfur amino acids en_US
dc.subject Swine en_US
dc.title The optimal true-ileal-digestible lysine and total sulfur amino acid requirement for finishing pigs fed paylean® en_US
dc.type Conference paper en_US 2004 en_US
dc.citation.epage 107 en_US
dc.citation.spage 101 en_US
dc.description.conference Swine Day, 2004, Kansas State University, Manhattan, KS, 2004 en_US
dc.contributor.authoreid mtokach en_US
dc.contributor.authoreid goodband en_US
dc.contributor.authoreid jnelssen en_US
dc.contributor.authoreid dritz en_US
dc.contributor.authoreid jderouch en_US

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