179 Efficacy and safety of amino acids with biomass for growth and health of newly-weaned pigs

Abstract

Abstract The objective was to test the efficacy of L-Thr or L-Val with biomass (ThrPro or ValPro; CJ BIO, Fort Dodge, IA) on growth performance and health compared with L-Thr or L-Val (purified) in newly-weaned pigs. There were 9 dietary treatments based on NRC (2012) requirements: NC (basal diet meeting 70% of requirements for SID Thr and Val); 4 treatments based on basal diet meeting 95% of requirements: LT (with L-Thr), LV (with L-Val), PT (with ThrPro), and PV (with ValPro); HLT (fivefold L-Thr in LT), HLV (fivefold L-Val in LV), HPT (fivefold ThrPro in PT), and HPV (fivefold ValPro in PV). Pigs were fed for 26 d in 2 phases. Feed intake and BW were measured at d 0, 5, 10, 17, and 26. Blood was collected on d 21 for liver function analysis. Pigs were euthanized on d 26 to collect jejunal mucosa for gut health parameters. Data were analyzed by SAS using MIXED procedure. Pigs fed LT and LV or PT and PV had higher (P < 0.05) ADG than pigs fed NC during phase 2. Pigs fed LT, LV, PT, and PV had higher ADFI and G:F than pigs fed NC during d 17 to 26. Pigs fed PT and PV had lower (P < 0.05) G:F than pigs fed HPT and HPV during phase 2. Pigs fed LT and LV or PT and PV had lower (P < 0.05) BUN than pigs fed NC. Overall, pigs fed PT and PV had no differences in any analyzed measurements from pigs fed LT and LV and pigs fed HPT and HPV. In conclusion, PT and PV were equally efficient to LT and LV for growth performance and health. HPT and HPV did not impair liver and gut health compared with PT and PV.