Table 1 Composition of the experimental diets used in this experiment

Nutrition Content
Crude protein 40.0
Crude fat 4.0
Crude fiber 5.0
Ash 15.0
Calcium 1.0
Phosphorus 1.0
Mineral premix*2 1.0
Vitamin premix*3 1.0
*1 Ehwa Feed Coporation (Busan, Korea).
*2 Vitamin premix contained the following amount which were diluted in cellulose (g kg-1 mix): L-ascorbic acid, 121.2; DL-α-tocopheryl acetate, 18.8; thiamin hydrochloride, 2.7; riboflavin, 9.1; pyridoxine hydrochloride, 1.8; niacin, 36.4; Ca-D-pantothenate, 12.7; myo-inositol, 181.8; D-biotin, 0.27; folic acid, 0.68; p-aminobenzoic acid, 18.2; menadione, 1.8; retinyl acetate, 0.73; cholecalciferol, 0.003; cyanocobalamin, 0.003.
*3 Mineral premix contained the following ingredients (g kg-1 premix): NaCl, 43.3; MgSO4·7H2O, 136.5; NaH2PO4· 2H2O, 86.9; KH2PO4, 239.0; CaH4(PO4) ·2H2O, 135.3; ferric citrate, 29.6; ZnSO4·7H2O, 21.9; Ca-lactate, 304.0; CuCl2, 0.2; AlCl3·6H2O, 0.15; KI, 0.15; Na2Se2O3, 0.01; MnSO4·H2O, 2.0; CoCl2·6H2O, 1.0.