0
In phase 1 there was a significant effect of treatment on ADG (0.177 vs. 0.156, 0.150, 0.144 Kg; +10 vs. IS, +30, +20 respectively; P < 0.05) and feed to gain efficiency (F:G; 1.31 vs. 1.19, 1.18, 1.11; +20, +30, IS, +10 respectively; P < 0.05). In period 2 there was an effect of treatment on ADFD (0.367 vs. 0.412, 0.418, 0.448 Kg; +30, +20, +10, +IS respectively; P < 0.05) and PUN levels (13.23 vs. 8.55, 8.28, 7.741; IS, +20, +30, +10 respectively; P < 0.05). Also, PUN levels were affected by weight (10.83 vs. 8.07; Heavy vs. Medium respectively; P < 0.05). In phase 3 there was no significant effect of treatment on performance or PUN levels. Over the entire trial, there was a significant effect of treatment on F:G (1.38 vs. 1.42, 1.43, 1.464; +10, +30, +20, IS; respectively; P < 0.05) and PUN was effected by weight (12.707 vs. 10.328; heavy vs. medium; P < 0.05).
These results indicate that there may be benefit to feeding higher levels of amino acids to nursery pigs and that medium weight pigs may benefit from increased amino acid levels compared with heavy weight pigs.
JL Pietig and CE Hostetler, 2010. Journal of Animal Science, 88 (E-Suppl. 2):489.
