ISSUE FOCUS FEED & ADDITIVE MAGAZINE February 2024 31 complementary activities aiming at increasing the overall digestibility of feed, by targeting the indigestible fraction of raw materials and anti-nutritional factors in degrading indigestible substrates and releasing nutrients. To strengthen the FEEDASE concept, Adisseo has developed Rovabio® Advance, a multi-carbohydrases enzyme which revolutionizes feed digestibility in any type of diet. INCREASE OVERALL FEED DIGESTIBILITY WITH A MULTI-CARBOHYDRASE ENZYME To demonstrate the efficacy of a mutli-carbohydrases (Rovabio® Advance), a digestibility trial was performed with Ross male broilers between 13 and 22 days of age, using the European Reference Method with ad libitum feeding and 3 days of total excreta collection (Bourdillon et al., 1990), at the experimental farm of Adisseo in Commentry, France. Birds were fed a common starter feed in crumbles based on wheat and soybean from 0 to 12 days, followed by a grower feed with either a simple composition (wheat and soybean meal) or a more complex composition (wheat, barley, rye, wheat DDGS, soybean meal, sunflower meal, rapeseed meal). Regardless ingredient composition of the diet, the addition of the enzyme significantly improved the energy utilization and the digestibility of several nutrients (Table 1). This improvement was more important for the complex in terms of ingredient and dietary fiber composition than for the simple diet. The improvement observed on energy utilization and digestibility of nutrients was related with arabinose xylose content 69.2 vs. 59.5 g/kg for complex and simple diets, respectively. To further validate the concept of global feed digestibility, the effect of Rovabio® Advance was evaluated in a typical wheat-based diet diluted with 3% of sand (Cozannet et al. 2018, Journal of Poultry Science). This study investigated the effect of Rovabio® Advance on energy and ileal amino acid (AA) digestibility of a complete wheat/ soybean-based diet in broilers. The commercial control diet was compared with a 3% nutrient-diluted version using silica as inert diluent. Digestibility of dry matter (DM), AA and gross energy (GE) were determined by analysis of feed, excreta and digesta. Ross broiler chicks were studied during the grower period and diet dilution did not increase feed intake. Apparent metabolizable energy (AME) content was significantly lower in the diluted versus control diet. Rovabio® Advance improved energy utilization (P < 0.001), leading to an increase of AME content for both the diluted and typical diets. AME Type of feed Simple Complex Body weight gain, g Feed intake, g Feed conversion Ash, % Calcium, % Phosphorus +10.3%* +1.0% +2.4% +13.4%* +7.2%* +5.9%* Dry matter, % Soluble Org. matter, % AME, kcal/kg AME, MJ/kg Protein, % Fat, % Starch, % +4.0%* +3.4%* +3.5%* +4.2% +2.5% +3.7%* +7.8%* +10.9%* +8.2%* +11.2%* +17.4%* +3.8%* (+107 kcal/kg) (+0.45 MJ/kg) (+228 kcal/kg) (+0.95 MJ/kg) -2.4% -3.5% -1.4% +2.0% -4.3% -6.0% Table 1. Differential effects obtained with Rovabio® Advance: simple and complex feed, improvements vs negative control diets *P<0.05 Ref: Cozannet et al. 2017, Poultry Science Nutrient digestibility and energy utilization Mineral retention
RkJQdWJsaXNoZXIy MTUxNjkxNQ==