The objective of this experiment was to evaluate the effect of mixed organic acids (MOAs) and levan type fructan (LYF) supplementation on the growth performance and fecal gas emission of weaned pigs. A total of 72 weaned pigs (Duroc × [Yorkshire × Landrace], average weight of 21.00 ± 0.78 kg) were randomly allotted to one of three dietary treatments with six replicate pens per treatment two barrows and two gilts per pen. The dietary treatments were as follows: (1) corn-soybean basal diet (CON); (2) CON + 0.1% MOAs (MOAs); (3) CON + 0.05% LYF (LYF). The experiment period lasted for 14 days. Dietary inclusion of MOAs and LYF increased (p = 0.036) body weight (BW) at day 14, (p = 0.001, p = 0.030) as well as average daily gain (ADG) and gain: feed (G : F) at day 14. However, dietary supplementation of MOAs and LYF reduced (p = 0.018) the fecal score at day 14. In addition, dietary inclusion of MOAs and LYF to the basal diet significantly reduced (p = 0.016) fecal NH3 emission on day 14 compared with pigs fed the control. Thus, MOAs and LYF supplementation positively affected growth performance and fecal NH3 emission in weaning pigs.
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