Abstract: Only sereval important parameters are calculated in the majority of home current dairy cattle ration formulation software programs. This is because it is difficult to consider all nutrients parameters in a whole system. Developed by the author, this dairy cattle ration formulation diagnosis system could compute those reached nutrients in cattle ration and diagnose nutrients banlance according to the ingredients composition on a cattle ration. Also, this software could predict some basic production performance after feeding a specific ration. Limit to the space, this article just takes the banlance of metabolize protein in dairy nutrition as an example to calculate and analyze the protein banlance of dairy ration according to the result calculated by this diagnose software.

Key words: ration formulation software; nutritients diagnosis; protein banlance