Reproductive performance of female breeder turkeys fed on maize‐soyabean diets supplemented with methionine

Supplemental methionine (MET) did not improve the reproductive performance of Medium White female breeder turkeys fed on maize‐soyabean diets of equal energy content, containing 100, 120 or 140 g crude protein (CP)/kg. 2. Egg production was significantly improved by feeding diets containing 120 or 140 g GP/kg compared with 100 g/kg, and egg weight was significantly improved by feeding 140 g CP/kg compared with 120 g/kg. 3. These results indicate that an amino acid(s) other than MET was limiting in diets from which hens obtained 16 g CP, 0.3 g MET and 0.6 g total sulphur amino acids (TSAA)/bird d, and that MET was not limiting at 24 g CP, 0.4 g MET and 0.8 g TSAA/bird d.