The contents of OM and CF tended to decrease, but the contents of NFE, EE and ash tended to increase in diets contained SPVS and SPVH compared with commercial diet.
Although, there were no significant differences in digestibility coefficients and TDN and DE values among the different levels of SPVS and SPVH, the 40% SPVS diet showed the highest digestibility coefficients of all nutrients and subsequently nutritive values, however, control diet had the lowest values (P < 0.05).
The daily weight gain of rabbits fed 20% BH + 20% SPVS, 40% SPVS, 20% BH + 20% SPVH and 40% SPVH diets increased by 3.80, 10.61, 1.79 and 8.40% compared with 40% BH diet, respectively.
Rabbits fed commercial diet showed significantly (P < 0.05) the highest feed cost and feed cost/kg gain, however, those fed 40% SPVS and SPVH diets showed significantly (P < 0.05) the highest total and net revenue and improvement (Table 5).