Effect of fibrolytic enzymes from Talaromyces versatilis on the in vivo energy digestibility in cassava meal fed to growing pigs

The study was conducted to evaluate the effect of fibrolytic enzymes from Talaromyces versatilis on the in vivo energy digestibility in cassava meal fed to growing pigs. A total of 8 Large White x Landrace female growing pigs with an average initial body weight of 43.3+-5.2 kg were arranged in a replicated 4 x 3 Youden square design with 4 treatments and 3 periods. Each treatment had 6 replicates. Four experimental diets were formulated. Diet 1 was a corn-soy meal consisting of 69.20% corn and 26.36% soybean meal, diet 2 was formulated with 30% cassava meal, diet 3 was formulated with 60% cassava meal and diet 4 was identical to diet 3 but supplemented with 100 mg/kg of commercial fibrolytic enzyme product containing endo-1,4-xylanase and endo-1,3(4) betha-glucanase (Rovabio Advance, Adisseo, France). Chromic oxide was added at a rate of 0.25% as an indigestible marker in all diets. Body weight was measured at the end of each period. Excreta was collected from each replicate by grab sampling. Total and daily gain, daily feed intake, feed:gain ratio, net energy intake and caloric efficiency were calculated. Apparent total tract digestibility (ATTD) of DM, OM, ash, GE, DE, ME and NE were also calculated. No significant effects were observed for the initial weight, weight gain, ADG, FI, ADFI, F:G, final weight, NE intake and caloric efficiency. Pigs fed diets supplemented with fibrolytic enzymes had similar growth performance and caloric efficiency compared with those fed control diets. The increasing level of CM in the diets did not affect the growth performance and caloric efficiency. The ATTD of DM, ATTD of OM, ATTD of GE, ATTD of DE, ATTD of ME and ATTD of NE improved (P0.0001) with the increasing levels of CM in the diet; however, the supplementation of fibrolytic enzymes did not affect the ATTD of DM, ATTD of OM, ATTD of GE, DE, ME and NE of the diets. The DE, ME and NE of cassava meal (DM basis) determined in the present experiment were 3,553, 3,411 and 2,592 kcal/kg, respectively. In conclusion, supplementation of fibrolytic enzymes from Talaromyces versatilis at 0.01% did not affect growth performance, caloric efficiency and energy digestibility in cassava meal when fed to growing pigs. Feeding cassava meal as the sole carbohydrate source in growing pig diets did not negatively affect the growth performance, caloric efficiency and dietary energy utilization.