ABSTRACT : The aim of this study was to assess the effects of dietary complex probiotic (Lactobacillus acidophilus, 1.0×107 CFU/g;Saccharomyces cerevisae, 4.3×106 CFU/g; Bacillus subtilis 2.0×106 CFU/g) on growth performance, nutrients digestibility, bloodcharacteristics and fecal noxious gas content in growing pigs. Ninety [(Duroc×Yorkshire)×Landrace] pigs with the average initial BW of39.75±1.97 kg were allocated into three treatments by a randomized complete block design. There were five pens per treatment with sixpigs per pen. Dietary treatments include: 1) CON (basal diet); 2) CP1 (basal diet+complex probiotic 0.1%) and 3) CP2 (basal diet+complex probiotic 0.2%). During the entire experimental period of 6 weeks, results showed that addition of complex probiotic at thelevel of 0.2% to diet increased ADG significantly (p<0.05). Also, digestibilities of DM and N tended to increase, however, no significantdifferences were observed (p>0.05). Blood characteristics (IgG, Albumin, total protein, RBC, WBC and lymphocyte) of pigs were notaffected (p>0.05) by complex probiotic supplementation. Fecal NH3-N was decreased (11.8%) significantly by the addition of complexprobiotic (p<0.05), but no effects were observed on fecal acetic acid, propionic acid and butyric acid concentrations (p>0.05). Inconclusion, results in this experiment indicated that dietary complex probiotic supplementation had a positive effect on growing pigsperformance and could decrease fecal NH3-N concentration. (Asian-Aust. J. Anim. Sci. 2005. Vol 18, No. 10 : 1464-1468)
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