Suplementação da beta-mananase em dietas com restrição energética

Abstract

The present study aims to evaluate the effects on the zootechnical performance traits, in vivo carcass quality, apparent digestibility of nutrients of the food, blood parameters, passage rate and fecal score when the beta-mannanase enzyme is used for the nutrition of growing pigs. We used a total of 40 crossbred male pigs with an initial average weight of 26.09 ± 0.957. They were randomly distributed following a randomized block design, composing 4 treatments with 10 repetitions each. The treatments consist in 1 control (DC0) and 3 experimental diets with the addition of beta-mannanase (300g/t) where there was energy reduction in 30 kcal (DC30), 45 kcal (DC45) or 60 kcal (DC60). The statistical analyzes were performed using the SAS University Edition software and we used ANCOVA or ANOVA, considering a 10.0% probability level, to verify the data. Among dietary treatments with the enzyme supplementation, there was a significant difference (P<0.05) for the variables CDAMS (%), CDAPB (%), CDAMO (%), CDAEB (%), MSD (%) and PD (%). Better EA and CA rates were observed in the DC45 treatment when compared to the others. The use of the enzyme did not affect the in vivo carcass characteristics, passage rate or fecal score of the animals. In conclusion, the use of the beta-mannanase enzyme in association with the xylanase enzyme promoted a better use of the nutrients, which implies a better zootechnical performance, meaning it can be used as a way to reduce the energy input in the formulation of food, hence, allowing a reduction in the production costs.