The aim of the experiment is to study the emulsion confecting parameters with heat labile feed additives, such as vitamins and enzymes, and the optimal vacuum infusion parameters of vitamin K_3 and phytase emulsion into hard pellets. The main study contents are: (1) The factors influencing the infiltration depth of the liquid thermo-sensitive feed additives into hard pellets, and the optimization of these parameters. (2) The optimal proportion of the emulsion ingredients including the emulsifiers, a...