Effect of Supplementation of Lysine and Methionine on Growth Performance, Nutrients Digestibility and Serum Biochemical Indices for Growing Sika Deer (Cervus Nippon) Fed Protein Deficient Diet

This study was conducted to investigate the effect of supplementation of lysine (Lys) and methionine (Met) on growth performance, nutrients digestibility and serum biochemical indices for growing sika deer fed crude protein (CP) deficient diet. Sixteen 5-month-old growing male sika deer were randomly assigned to 4 groups receiving diets (n=4): i) CP-adequate (16.63%) diet; ii) CP-deficient (13.77%) diet with 3 g/kg Lys; iii) CP-deficient with 3 g/kg Lys and 1 g/kg Met; iv) CP-deficient diet with 3 g/kg Lys and 2 g/kg Met. The digestibility of dry matter P