This study was conducted to determine the suitability of Biotite "V" for a dietary supplement on growth performance, nitrogen digestibility and serum characteristics in nursery pigs. A total 60 crossed pigs(average 15.09±0.18kg body weight. landrace x Duroc x Yorkshire) were used in this experiment. Pigs were allocated into five treatments. Each treatment had three replicates with four pigs per replicate. This study was carried out for 28 days. The five treatments were control(Con: basal diet), B0.1 (basal diet + Biotite "V" 0.1%), B0.3 (basal diet + Biotite "V" 0.3%), B0.6 (basal diet + Biotite "V" 0.6%), B1.0 (basal diet + Biotite "V" 1.0%). During 0 to 14 days, and gain/ feed were not significantly different among treatments. During 14 to 28 days and overall experimental period. and gain feed were not significantly different among treatments. However, was significantly increased in GB0.6 treatment(P<0.05). DM and N digestibility were not significantly affected by treatments. In total-cholesterol, difference between d 0 and d 14 was decreased in GB 0.3 treatment. However, there was no significant difference among the treatments. HDL-cholesterol was significantly increased in GB0.3 treatment compared to Con(P<0.05). IgG significantly increased to 86.6% in GB0.1 treatment compared to Con(P<0.05). In conclusion, the results obtained from this feeding trial suggest that below 0.6% supplementation for nursery pigs had improved immunostimulation and decreased cholesterol level in serum.

Key word: Pigs, Biotite, Growth