Effect of Different Supplementation Levels of Palm Kernel Meal with ß-Mannanase on Growth Performance, Blood Profiles, Pork Quality and Economic Analysis in Growing-Finishing Pigs.

This experiment was conducted to evaluate different levels of palm kernel meal supplementation with ß-mannanase on growth performance, blood profiles, pork quality and economic analysis in growing-finishing pigs. A total of 120 growing pigs ([Yorkshire × Landrace] × Duroc), average 30.50 ± 3.039 kg body weight (BW), were used in feeding trial. Pigs were allotted to one of five treatments in 4 replicates with 6 pigs per pen by body weight and sex in a randomized complete block design. Pigs were fed experimental diet with different levels of palm kernel meal (0, 4, 8, 12 or 16%) for 12 weeks (growingⅠ: 0-3 week, growingⅡ: 4-6 week, finishingⅠ: 7-9 week, finishingⅡ: 10-12 week). In feeding trial, there was no significant difference in BW and ADG among the treatments. However, ADFI was increased (linear, P<0.05) when pigs were fed diet with high level of PKM supplementation during the whole experimental period (0-12 weeks). In serum BUN concentration, no difference was observed among treatments. The pork pH after slaughter and proximate analysis of longissimus muscle were not affected by dietary PKM level. In meat color, a* and b* values, there was no significant difference among dietary treatments but in L* value, there was significant difference at 3, 12 h after slaughter. As dietary PKM supplementation level increased, L* value was increased at 3, 12h after slaughter (linear, P<0.05). In addition, significant difference was not observed on shear force and water holding capacity by dietary PKM level. Cooking loss was increased linearly when dietary PKM level increased (linear, P<0.05). Interestingly, TBARS value tended to decrease when pigs were fed diet with high level of PKM supplementation (linear, P<0.05). When pigs were fed diets containing PKM with β-mannanase, days to market weight reached earlier compared to PKM 0% treatment and the cost of total feed was also decreased as dietary PKM level increased. PKM supplementation improved the economical profit by days to market weight and total feed cost with no detrimental effect on growth performance, so that PKM can be supplemented up to 16% in growing-finishing pig diet.