292 Responses of growing-finishing pigs to two levels of a multi-enzyme blend (Natuzyme) as compared to pigs fed a lower energy-higher fiber, or a higher energy-lower fiber diet

Abstract

The objective of this study was to evaluate whether the performance of pigs could be maintained when pigs were fed a lower energy diet (ME = 3423 kcal/kg) with higher fiber from 50% DDGS (NC), compared to a positive control (PC) diet with lower fiber and a maximum of 30% DDGS with an increased energy content from additional added fat (ME = 3476 kcal/kg), when either 193 (NZ1X) or 386 (NZ2X) mg/kg of Natuzyme (a source of xylanase, phytase, cellulase, β-glucanase, α-amylase and protease) was added to the NC diet. A FANCOM feed weighing system measured feed delivered to the individual pens, and weight of pigs (1024 pigs, initial body weight of 50.1 kg) and feed was determined on d 0, 14, 28, 42, 56, 70, and 83. Blood glucose was measured at d 42 on trial. Data were analyzed as a completely randomized design using GLM in Minitab. On d 83 of the trial, NC (107.4 kg) and NZ2X (108.4 kg) weighed less (P = 0.050) than PC (112.4 kg) and NZ1X was intermediate (109.5 kg). In Table 292 is a summary of performance. PC tended to have a 9.4% higher ADFI (P = 0.088) than NC, with NZ1X 5.2% and NZ2X 4.3% intermediate. This difference in ADFI resulted in PC consuming 11.1% more energy per day (9166 vs. 8249 kcal ME/d) than NC. The PC tended to have a 7.8% greater ADG than NC (P = 0.062), with NZ1X and NZ2X intermediate. NZ1X and NZ2X tended to have lower mortality (including pulled pigs) than NC, with PC intermediate. No differences were observed in blood glucose (P = 0.294), but NC had a 7.7% lower blood glucose (72.8 umol/L) as compared to PC (78.8 umol/L), NZ1X (78.8 umol/L) and NZ2X (79.4 umol/L). In conclusion, PC grew faster than NC and Natuzyme partially recovered the performance difference between NC and PC, and tended to improve survivability of pigs on a lower energy, high DDGS diet (NC). Summary of performance of Day 0 to 83 Summary of performance of Day 0 to 83