Rovabio® contains 19 different enzyme activities that degrade a variety of non-starch polysaccharides (NSPs).
Through an extensive R&D program, Adisseo has demonstrated that the addition of Rovabio® increases the apparent metabolizable energy of soybean meal (SBM) by 4.5% (i.e. 105 kcal ME/kg; 47.6 kcal/lb) and AA digestibility by 1.5%.
In poultry nutrition, SBM is a very important source of protein, digestible amino acids (dAA) and energy (AME). In typical broiler diets, approximately 70% of digestible lysine and 25% of the ME can come from SBM. Rovabio®, with its multiple enzyme activities, increases the ME and dAA contribution from SBM in these diets.The significant increases just mentioned are directly related to the high NSP content in SBM: pectin, cellulose and hemicellulose. The non-starch polysaccharides, pectin, cellulose and hemicellulose are complex polymers and oligomers that represent 22% of the NSP content of SBM.
The multiple enzyme activities in Rovabio® break apart plant cell walls, protein-NSP complexes and starch-NSP complexes in SBM, as demonstrated in Figure 1 and numerous broiler growth assays.In a recent validation study at CERN(2), broilers were fed wheat and barley based diets, with SBM inclusion rates ranging from 20 to 40 %, with and without Rovabio®. When assigning energy improvement to each raw material, results show that nitrogen-corrected metabolizable energy of SBM was improved by 127 kcal/kg with Rovabio® (2,256 vs. 2, 129 kcal/kg DM, respectively).
These data were confirmed in a follow up broiler trial(3) where broilers were fed reduced-energy, corn-based growing and finishing diets that contained 30.4% and 25.2% SBM in the respective phases. In this trial, the inclusion of Rovabio® improved 35 day body weight by +3.9 % and feed conversion by -2.5%.
Figure 1: The dissolution of cell wall components in SBM that are in contact with Rovabio.
These in vitro data support the improvements in ileal metabolizable energy (IME) that were determined using caecectomized cockerels. An average of two IME tests(1) demonstrated that Rovabio® increased SBM IME from SBM by + 4.5 % (2,397 kcal/kg DM in Rovabio®-supplemented SBM vs. 2,292 kcal/kg DM in Rovabio®-free SBM).
« In addition to its already well known activity in cereal grains and byproduct meals, Rovabio® possesses an ideal complement of enzymes that are required for the breakdown of NSPs in soybean meal. These combined enzyme activities allow broilers to extract and utilize the full nutrient value of a diet that contains soybean meal.» concludes Aurélie Preynat (Reasearch Manager Nutrition and Enzyme at Adisseo).
(1) Benefit of a multi-enzyme product on corn- and soybean meal based diet in poultry Grenier, S et al., 2005
(2) Adisseo internal trial C11-112
(3) Adisseo internal trial E13-226