This experiment was conducted to evaluate the effects of δ-aminolevulinic acid (ALA) when added to sows’ diet on their reproductive performance and growth performance and on the hematology parameters of the sows and their piglets. Sixteen multiparous sows (Yorkshire × Landrace) were allotted into two treatment groups and fed basal diets (CON, piglets were injected with iron dextran) or the basal diet containing 0.1% ALA (ALA, piglets were not injected with iron dextran) from day 100 of gestation to day 28 of lactation. Supplementation of ALA had no effect on the body weight (BW), backfat thickness (BFT), or litter sizes of sows in the present experiment. However, the average daily feed intake (ADFI) of the sows was significantly improved (p < 0.05) in the ALA group. Supplementation of ALA had no effect on the growth performance or survival of suckling piglets but had a significant effect on the birth weight (p < 0.05). With regard to the blood profiles, serum concentrations of iron were unaffected in sows and piglets as compared to the control group. Red blood cell (RBC) counts were significantly improved (p < 0.05) in sows during late gestation to the time before farrowing period and in piglets at weaning. In summary, these results suggest that dietary supplementation of ALA can have positive effects by improving growth performance and blood RBC in sows and suckling piglets.
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