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Effect of natural plant extract on the growth perfor-mance and immune function and serum hormone level in piglets

Yu Huimin Cai Huiyi et al  
The effects of natural plant extract"Liu - Kang - Su"on growth performance,immune responses and serum hormone level in piglets were studied in the trial.96 piglets(weight of 10 kilogram ±STDEVP)were allocated into 4 treatments,4 replicates per treatment,6 piglets per replicate.The basal diet consisted mainly of corn,soybean meal and whey meal(control group)was supplemented by 0.2 % "Liu - Kang - Su"(group one)or 0.1 % "Liu - Kang - Su" + 50 mg/kg olaquindox(group two)or 100 mg/kg olaquindox(group three),respectively,And basal diet as the control group.The results showed that:1)Inclusion of natural plant extract could improve feed intake,average daily gain,and feed conversion efficiency.The average daily gain(ADG)of group one was higher (P 0.05) than that of the control group,and was higher 12.29 % and 8.88 % than that of the control and group three,respectively.There was no significant difference in average daily feed intake(ADFI)among the trials(P 0.05).The ADFI of group one and group two were 5.45 % and 3.87 % higher than that of control group,respectively.The feed/gain of the treatments were higher (P 0.05) than that of the control group.2)Supplementation of natural plant extract enhanced antibody production and alexin synthesis.The serum IgG,IgA and IgM content of the treatments were higher than that of the control group,but there was no difference(P 0.05).The serum alexin C3 and C4 content of the treatments were higher than that of the control group,alexin C4 content of group two was higher (P 0.05) than that of the control group.3)Addition of natural plant extract modulated hormone excretion.The serum growth hormone and T3 of the treatments were higher than that of the control group.The serum growth hormone and T3 of group one and group two were higher than the other treatments.
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