Is the total sulfur amino acid:lysine ratio for lactating sows greater than 50%?

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dc.contributor.author Schneider, J.D.
dc.contributor.author Nelssen, Jim L.
dc.contributor.author Tokach, Michael D.
dc.contributor.author Goodband, Robert D.
dc.contributor.author DeRouchey, Joel M.
dc.contributor.author Dritz, Steven S.
dc.date.accessioned 2009-11-10T14:38:07Z
dc.date.available 2009-11-10T14:38:07Z
dc.date.issued 2009-11-10T14:38:07Z
dc.identifier.uri http://hdl.handle.net/2097/2121
dc.description Swine research, 2005 is known as Swine day, 2005 en
dc.description.abstract A total of 75 lactating sows were used in a study to determine whether the ratio of total sulfur amino acid (TSAA) to lysine calculated from the NRC (1998) is adequate for lactating sows. Low and high sulfur amino acid diets were formulated to contain a (true ileal digestible (TID) TSAA content of 0.44 or 0.57%, respectively. Both experimental diets were based on corn and soybean meal and were formulated to contain 0.88% TID lysine (0.97% total lysine). Thus, the TID TSAA:lysine ratios were 50 and 65% for the two experimental diets, respectively. Both experimental diets contained 0.37% L-lysine HCl, with other amino acids (isoleucine, threonine, tryptophan, and valine) added to ensure that TSAA were the first limiting amino acids. Sows were farrowed in three farrowing groups and were randomly allotted to the dietary treatments on the basis of parity. The lactating sows fed the 0.57% T had greater ADFI than did sows fed the 0.44% TSAA diet (P<0.05). Sow weight loss was not affected by lactation treatment, but sows fed the diet with more TSAA had greater (P<0.02) litter weight gain, heavier (P<0.01) litter weaning weights, and heavier (P<0.06) individual pig weaning weight than did sows fed the 0.44% TSAA diet. These data indicate that the basal diet can be used in future experiments to titrate the TSAA requirement of the sow. Results also indicate that the TID TSAA requirement is greater than 0.44% and the TSAA:lysine ratio is greater than 50% for lactating sows. Because amino acid recommendations from the NRC (1998) suggest that the TID TSAA:lysine ratio is approximately 48%, more research is warranted to more adequately determine the TID TSAA:lysine ratio for lactating sows. 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 TSAA en_US
dc.subject Lysine en_US
dc.subject Lactating sow en_US
dc.subject Swine en_US
dc.title Is the total sulfur amino acid:lysine ratio for lactating sows greater than 50%? en_US
dc.type Conference paper en_US
dc.date.published 2005 en_US
dc.citation.epage 33 en_US
dc.citation.spage 30 en_US
dc.contributor.authoreid jnelssen en_US
dc.contributor.authoreid mtokach en_US
dc.contributor.authoreid dritz en_US
dc.contributor.authoreid goodband en_US
dc.contributor.authoreid jderouch en_US

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