4. Nitrogen mass-balance
Table 3 shows the N mass-balances (kg/kg) for the different dietary treatment groups of the plant-protein based diets in the three experiments as derived from the total duration of each experiment (17–19 days). There was no difference between the dietary treatments in any of the plant-protein based diets except that solid N waste was reduced in the SOY diet supplemented with either β-glucanase or protease (P0.05).