The optimal true ileal digestible lysine and threonine requirement for nursery pigs between 25 and 55 lb
dc.citation.epage | 66 | en_US |
dc.citation.spage | 61 | en_US |
dc.contributor.author | Lenehan, N.A. | |
dc.contributor.author | Usry, J.L. | |
dc.contributor.author | Hastad, C.W. | |
dc.contributor.author | Barker, M.R. | |
dc.contributor.author | Frantz, N.Z. | |
dc.contributor.author | Groesbeck, C.N. | |
dc.contributor.author | James, B.W. | |
dc.contributor.author | Keegan, T.P. | |
dc.contributor.author | Lawrence, K.R. | |
dc.contributor.author | Young, M.G. | |
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.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 |
dc.date.accessioned | 2009-11-09T22:32:56Z | |
dc.date.available | 2009-11-09T22:32:56Z | |
dc.date.issued | 2009-11-09T22:32:56Z | |
dc.date.published | 2003 | en_US |
dc.description.abstract | A total of 360 pigs (initially 22.2 lb and 31 d of age) was used in a 21-d growth assay. This trial was conducted as a combination of two separate trials in order to simultaneously examine both the true ileal digestible lysine and true ileal digestible threonine requirement and determine the appropriate threonine:lysine ratio. The first part of the trial consisted of five treatments with increasing dietary lysine (1.0. 1.1, 1.2, 1.3 and 1.4% true digestible lysine). The second part consisted of five treatments with increasing dietary threonine (0.66, 0.72, 0.78, 0.84 and 0.91% true ileal digestible threonine). The highest level of both lysine and threonine (1.4% and 0.91% respectively) served as a positive control, and this diet was combined as one treatment to give a total of nine treatments. Average daily gain increased to 1.3% true ileal digestible lysine, and then plateaued, while ADG increased to 0.78% true ileal digestible threonine, suggesting a threonine:lysine ratio of 60% for ADG. Increasing dietary lysine improved F/G linearly through 1.4% true ileal digestible lysine, while F/G improved up to a level of 0.84% true ileal digestible threonine. Using a level of 1.4% true ileal digestible lysine, a threonine:lysine ratio of approximately 60% is implicated for F/G. Amino acid and plasma urea N values were measured on d 10 of the trial. Plasma lysine concentrations were maintained steadily as the true ileal digestible lysine level increased, with a slight increase in plasma lysine concentration observed as the true ileal digestible lysine level increased from 1.3% to 1.4%. A linear increase (P<.0001) in plasma threonine concentration was observed as true ileal digestible threonine increased from 0.66% to 0.91%. Plasma urea N decreased linearly (P<0.0003) with increasing true ileal digestible lysine. As true ileal digestible threonine increased, there was no difference seen in plasma urea N concentration. Following analysis of the data, a true ileal digestible threonine to lysine ratio of 60% is suggested. A second study is in progress where the higher true digestible lysine level of 1.5% is used to verify trial results. | en_US |
dc.description.conference | Swine Day, 2003, Kansas State University, Manhattan, KS, 2003 | en_US |
dc.identifier.uri | http://hdl.handle.net/2097/2086 | |
dc.publisher | Kansas State University. Agricultural Experiment Station and Cooperative Extension Service | en_US |
dc.relation.isPartOf | Swine day, 2003 | en_US |
dc.relation.isPartOf | Kansas Agricultural Experiment Station contribution; no. 04-120-S | en_US |
dc.relation.isPartOf | Report of progress (Kansas State University. Agricultural Experiment Station and Cooperative Extension Service); 920 | en_US |
dc.subject | Threonine | en_US |
dc.subject | Lysine | en_US |
dc.subject | Nursery pigs | en_US |
dc.subject | Swine | en_US |
dc.title | The optimal true ileal digestible lysine and threonine requirement for nursery pigs between 25 and 55 lb | en_US |
dc.type | Conference paper | en_US |
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