The digestibility of nutrients in rabbits is presented in Table 2. The rabbits in our experiment showed that
in EG2 with 20g Yucca extract in 100 kg of diet lowered the coefficients of digestibility for crude fibre, nitrogen-free extract and organic matter compared to other evaluated breeds of rabbits, but the differences were not statistically significant. The digestibility of crude fibre and fat were higher in a population of rabbits that consumed diet with 5g yucca extract additive. There were no significant differences (P≥0.05) for starch digestibility between the control and both treated groups.
The chemical composition of feed gives an indication of the potential nutrient supply, but determination of digestibility provides an estimate
of the nutrients available to the animal. Digestibility
of nutrients in different rabbit genotypes was studied by several authors. Kustos and Hullár (1992) followed
the heritability of digestibility in New Zealand White (NZW) rabbits. In their experiment the authors determined low (h2 = 0.19) heritability values for
the coefficients of digestibility. Lebas (1973) in the NZW breed determined 4 % better coefficients of digestibility for dry matter and organic matter than in the Californian