Inhaltszusammenfassung

Information about the relative bioavailability (RBV) of L-Methionine (L-Met) compared with DL-Methionine (DL-Met) for pigs is limited. Therefore, 2 experiments were conducted to compare the RBV of L-Met and DL-Met for weaned pigs. In Exp. 1, 252 PIC pigs (initial BW of 7.9 kg) were assigned to 7 treatments with 6 pen replicates for 21 d. Diets included a basal diet (BD; 72% of the NRC recommendation for Met), the BD + 0.05% DL-Met or L-Met (84% of the NRC recommendation), the BD + 0.10% DL-Me...Information about the relative bioavailability (RBV) of L-Methionine (L-Met) compared with DL-Methionine (DL-Met) for pigs is limited. Therefore, 2 experiments were conducted to compare the RBV of L-Met and DL-Met for weaned pigs. In Exp. 1, 252 PIC pigs (initial BW of 7.9 kg) were assigned to 7 treatments with 6 pen replicates for 21 d. Diets included a basal diet (BD; 72% of the NRC recommendation for Met), the BD + 0.05% DL-Met or L-Met (84% of the NRC recommendation), the BD + 0.10% DL-Met or L-Met (97% of the NRC recommendation), and the BD + 0.15% DL-Met or L-Met (110% of the NRC recommendation). In Exp. 2, 3 diets (the BD, and the BD + 0.15% DL-Met or L-Met), which were used in Exp. 1, were fed to 144 PIC pigs (initial BW of 7.8 kg) for 21 d to confirm the effects of the same quantities of DL-Met or L-Met to a Met-deficient diet on performance of 8 to 15 kg pigs. In Exp. 1, the overall ADG and G:F increased linearly (P < 0.01) by adding DL-Met or L-Met. Performance of pigs fed diets supplemented with the same inclusion levels of DL-Met and L-Met were not different (P > 0.60). Using a slope-ratio regression, the RBV of L-Met relative to DL-Met was 99.6% (95% confidence intervals: 65–134%) based on ADG as a response of supplemented Met intake. In Exp. 2, 0.15% supplementation with DL-Met or L-Met increased ADG (P < 0.05) and tended to improve G:F (P = 0.065), but there was no effect on Met source (P > 0.05). Overall, these data indicated that L-Met and DL-Met are equally bioavailable as Met sources for weaned pigs.» weiterlesen» einklappen

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DDC Sachgruppe:
Landwirtschaft, Veterinärmedizin