Effects of ratio of total sulfur amino acid to lysine on finishing-pig growth performance

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dc.contributor.author Lawrence, K.R.
dc.contributor.author Goesbeck, C.N.
dc.contributor.author Neill, C.R.
dc.contributor.author Goodband, Robert D.
dc.contributor.author Tokach, Michael D.
dc.contributor.author Nelssen, Jim L.
dc.contributor.author Dritz, Steven S.
dc.date.accessioned 2009-10-20T20:13:35Z
dc.date.available 2009-10-20T20:13:35Z
dc.date.issued 2009-10-20T20:13:35Z
dc.identifier.uri http://hdl.handle.net/2097/1914
dc.description.abstract The objective of this study was to characterize the growth response to total sulfur amino acids (TSAA) and lysine simultaneously to estimate the true-ileal-digestible (TID) TSAA-to-lysine ratio in early finishing pigs. One hundred and twenty-six pigs were used in a 27-d growth study. Pigs (73 to 134 lb) were blocked by sex and weight and were allotted to one of nine dietary treatments with five TID lysine (0.79, 0.87, 0.94, 1.02 and 1.10%) and five TID TSAA (0.53, 0.57, 0.61, 0.66 and 0.70%) concentrations. The highest lysine (1.10%) and TSAA (0.70%) concentrations were combined to form one treatment used in both the lysine and TSAA titrations. In diets evaluating increasing TID lysine, methionine & cysteine ratios were 64 to 66% of lysine; and in diets evaluating increasing TSAA, diets were formulated to 1.10% TID lysine. Increasing TID lysine increased ADG (linear, P<0.01) and improved F/G (quadratic, P<0.10) from d 0 to 14 and from d 0 to 27. No differences (P>0.05) were observed in ADFI. Increasing TSAA had no effect (P<0.05) on ADG or F/G, but pigs fed the diet containing 0.70% TSAA had numerically greater ADG than did pigs fed lower rates. As TSAA concentration increased to 0.61%, feed efficiency numerically improved (P = 0.16). Using a TID lysine requirement of 1.02% and TID TSAA requirement of 0.61% suggests a TSAA-to-lysine ratio of 60%. The surface response analysis suggests a similar TSAA-tolysine ratio of 59% for overall F/G. 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 Swine en_US
dc.subject TSAA en_US
dc.subject Lysine en_US
dc.subject Pigs en_US
dc.subject Finishing pigs en_US
dc.title Effects of ratio of total sulfur amino acid to lysine on finishing-pig growth performance en_US
dc.type Conference paper en_US
dc.date.published 2004 en_US
dc.citation.epage 93 en_US
dc.citation.spage 90 en_US
dc.description.conference Swine Day, 2004, Kansas State University, Manhattan, KS, 2004 en_US
dc.contributor.authoreid goodband en_US
dc.contributor.authoreid mtokach en_US
dc.contributor.authoreid dritz en_US
dc.contributor.authoreid jnelssen en_US

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