Effects Of Compound Immune Promoter (CoIP) On The Growth Performance, Some Biochemical Indictors And The Immunity Of Penaeus Chinensis

A feeding trial was conducted to study the effects of CoIP on the growth performance, some biochemical indictors and the immunity of Penaeus Chinensis. The groups were fed with diets contained Og/kg(C), 1.60g/kg(Ei), 1.75 g/kg(E2), 2.00 g/kg(E3), 2.50 g/kg(E4), respectively.The results showed as follows:(l) AfterPenaeus Chinensis was fed on the feedstufFs of CoEP, the activity of Phenoloxidase (PO) and Surperoxide Dismutase (SOD) in serum was improved. When the quantity of CoIP was more than 1.75g/kg, the activity of Phenoloxidase was increased significantly (PO.05) and the highest activity of it was at 1.75g/kg (PO.01). For Surperoxide Dismutase in serum was changed clearly when the quantity of CoIP was more than 1.60g/kg (p<0.05). (2) Activiy of TG, SDH and AST/GOT was changed with the different amount of CoIP. When CoIP was no less than 1.60g/kg, TG rised significantly (P<0.05).But at 1.75g/kg, it had the maximum activity (PO.01). To SDH, it had no evident change with the quantity of CoIP. At 1.75g/kg, 2.00g/kg and 2.50g/kg, AST/GOT showed significant difference to control group (PO.01,0.05,0.05). (3) As for Phagocytic Ratio (PR), it increased obviously at 2.50g/kg (PO.05), 1.75g/kg and 2.00g/kg (PO.01) respectively. Lysozyme (LSZ) rised significantly when CoIP was no less than 1.75g/kg (PO.05). (4) CoIP could improve performance, survival rate and feed conversion ratio of Penaeus Chinensis. When the quantity of CoIP was no less than 1.75g/kg, feed conversion rate was improved evidently(PO.05); survival ratio and condition factor rised significantly too (PO.05). At the same time, the growth and special growth ratio were changed with the different quantity of CoIP at different level ranged from 1.75g/kg to 2.50g/kg.