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Pigs have a poor utilization of phosphorus (P) from the form of phytate (myo-inositol hexaphosphate, IP6) due to the lack of significant endogenous activity in the digestive tract to efficiently dissociate phosphate radical from organic compounds. In grain, 65-75% of P is in this form. However, adding phytase to the diet with high IP6 content can greatly improve the utilization rate of P. The objective of this study was to evaluate the efficacy of supplementing a corn-wheat-soybean meal-based diet with a multi carbohydrase and phytase complex (MCPC) on growth performance, apparent total tract digestibility (ATTD) of nutrients, carcass traits, and meat quality in growing-finishing pigs. For that purpose, a total of 300 pigs were randomly allotted to three groups with 10 replicates of 10 pigs each. Pigs from three groups were fed positive control (PC) or negative control (NC), without or with MCPC diets, respectively. The MCPC supplied at least 1800, 1244, 6600, and 1000 units of xylanase, β-glucanase, α-arabinofuranosidase, and phytase per kilogram of diet, respectively. The NC diet was the PC diet but reduced in net energy (NE), digestible amino acids (dig. AA), digestible P (dig. P), and Ca by 74 kcal/kg, 7.0%, 0.134, and 0.119 percentage points, respectively. The diets were fed in 4 growth phases based on body weight (BW): phase 1: 25–50 kg, phase 2: 50–75 kg, phase 3: 75–100 kg, and phase 4: 100–135 kg.
Compared to the PC, the NC diet decreased body weight gain, feed intake, and (or) feed to gain ratio during the growing/finishing phases 1, 2, 3, and 4. It also reduced the ATTD of crude protein, crude fat, P, and Ca of pigs. MCPC supplementation improved the body weight gain, feed intake, and (or) feed to gain ratio in phases 2, 3, and 4 and the ATTD of crude protein, crude fat, ash, P, and Ca for the NC diet. Additionally, dietary treatment had no effects on carcass traits and meat quality with the exception that the loin eye area in the NC plus MCPC diet was higher than the NC diet.
In conclusion, the addition of MCPC to a corn-soybean meal-wheat-based diet with reduced energy and nutrients improved the growth performance and nutrient digestibility but had little effect on carcass traits and meat quality in growing-finishing pigs.
Huang YK, Zhao L, Sun H, Xu XM, Maamer J, Preynat A, Sun LH, Qi DS. A Multicarbohydrase and Phytase Complex Is Able to Compensate a Nutrient-Deficiency in Growing-Finishing Pigs. Animals. 2021; 11(4): 1129. https://doi.org/10.3390/ani11041129
