PSIV-4 Effect of combinations of feed enzymes on growth performance and nutrient digestibility in nursery pigs fed complex diets

摘要

Feed enzymes provide opportunities to enhance nutrient utilization and intestinal health of newly weaned pigs. The objective of this study was to evaluate supplemental effects of multi-enzymes in diets that are 7% deficient in SID Lys and other essential amino acids. Sixty four pigs weaned at 7.22 ± 0.04 kg BW were allotted to 2 dietary treatments with 8 replicates per treatment and 4 pigs per pen based on a completely randomized block design using sex and initial BW as blocks. Dietary treatment was the supplementation of multi-enzymes (4,000 U of xylanase, 150 U of amylase, 150 of β-glucanase, and 3,000 of U protease/kg, DuPont Animal Nutrition, UK). Pigs were fed based on 2 phases (14 and 27 days for each phase). Phase 2 diets included titanium dioxide as an indigestible external marker to calculate nutrient digestibility. Body weight and feed intake were measured at d 0, 14, and 42. From d 40 to 42, fresh fecal samples were collected from each pen and pooled by pen, weighed, freeze dried, and ground. Diet and fecal samples were used to quantify dry matter, titanium dioxide, and gross energy. Data were analyzed using the MIXED procedure of SAS. Initial BW were not different among treatments. Supplementation of multi-enzymes increased (P < 0.05) ADG (69 to 131 g/d), ADFI (134 to 181 g/d), and G:F (0.411 to 0.717) during phase 1. During phase 2, growth performance was not different among pigs. Supplementation of multi-enzyme increased (P < 0.05) apparent total tract digestibility (ATTD) of gross energy (84.5 to 89.3%). From this study, supplementation of 4,000 U of xylanase, 150 U of β-glucanase, 3,000 U of protease/kg, and 150 U amylase enhanced growth performance of pigs during the first 14 days after weaning and energy digestibility at 42 days after weaning.