PSXIII-14 Effect of non-Starch Polysaccharide Enzyme Supplementation with low Energy Diet on Growth Performance, Lean Meat Percentage, Back fat Thickness, and Nutrient Digestibility of Growing Pigs

Abstract This study was conducted with the objective of evaluating a way to reduce feed costs with better meat characteristics of growing pigs by supplementing non-starch polysaccharide enzyme (NSPE) in energy reduced diets. A total of 200 growing pigs [(Landrace Yorkshire) Duroc] weighing 22.94 ± 0.22 kg were divided into five dietary treatments, each with eight replication pens (3 barrows and two gilts). The pigs were allotted in a completely randomized block design according to body weight and sex. The dietary treatments were: CON, basal diet (NE 2500 Kcal); NSPE1, basal diet + 0.04% NSPE; NSPE2, (basal diet-20 Kcal) + 0.04% NSPE; NSPE3, (basal diet-30 Kcal) + 0.04% NSPE; NSPE4, (basal diet-50 Kcal) + 0.04% NSPE. We assessed growth performance, lean meat percentage (LMP) and backfat thickness at initial, week 4 and week 8. Apparent nutrient digestibility was assessed in weeks 4 and 8. There was no significant difference (P >0.05) among the groups on growth performance. In week 8, gradual reduction of energy caused a linear reduction (P=0.028) of backfat thickness and a linear increase (P=0.016) of LMP. In addition, at week 8, supplementation of NSPE enzyme showed improved digestibility of nitrogen (P=0.046) and energy (P=0.037) in the NSPE1 group than the CON group. In short, gradual reduction of dietary energy supplemented with NSP enzyme showed consistent growth performance with positive changes in backfat thickness and LMP of growing pigs.