The purpose of this study was to evaluate the Lys and Thr responses of TP-16 male broilers. Experiment 1 (14-28 d of age) showed no significant live performance effects. In Experiment 2, Lys and Thr (P=0.021) interacted to affect 28 to 42 d body weight gain and (P=0.004) feed intake. Lys main effects improved body weight gain (P=0.002), and feed conversion (P=0.009). Thr fed at the 0.68% level improved body weight gain and feed conversion. Mortality did not differ among treatments and averaged 0.09% across all treatments. The study indicated the sensitivity of the Thr:Lys ratio when broilers are fed diets containing marginal Lys. Although Thr X Lys interactions occurred in this study, the Lys levels in the test diets may have been too high for determining a ratio to an amino acid in a factorial study. Interaction results indicate that the Thr:Lys ratio in broilers from 28 to 42 days of age is between 0.57 to 0.68.
| Identifer | oai:union.ndltd.org:MSSTATE/oai:scholarsjunction.msstate.edu:td-3982 |
| Date | 02 May 2009 |
| Creators | Everett, Derrick Lashawn |
| Publisher | Scholars Junction |
| Source Sets | Mississippi State University |
| Detected Language | English |
| Type | text |
| Format | application/pdf |
| Source | Theses and Dissertations |
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