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

Abstract

This experiment was conducted to evaluate different levels of palm kernel meal with ß-mannanase supplementation 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 were used in feeding trial. Pigs were allotted into each treatment by body weight and sex in 4 replicates with 6 pigs per pen in randomized complete block (RCB) design. The treatments were different levels of palm kernel meal (0, 4, 8, 12 or 16%) in experimental diet. In feeding trial, there were no significant differences in growth performance and BUN concentration among dietary treatments. However, ADFI was increased linearly when pigs were fed high PKM diet during the whole experimental period (P<0.05). The pork pH and proximate analysis of longissimus muscle were not affected by dietary treatments. In pork color, a* and b* values, were not significantly different among dietary treatments. However, L* value was decreased as PKM level increased. In addition, significant differences were not observed on shear force and water holding capacity (WHC) by dietary PKM with β-mannnanase supplementation. Cooking loss was linearly higher when PKM level increased (P<0.05). In fatty acid composition, C16:0, SFA were increased and USFA, USFA/SFA ratio were linearly decreased as pigs were fed higher PKM treatment diets (P<0.05). The value of TBARS tended to decrease when pigs were fed high PKM treatment diets. When pigs were fed diets containing PKM with β-mannanase, days to market weight was reached earlier compared to control diet and cost of feed per weight gain was also decreased by PKM treatments. This experiment demonstrated that supplementation of PKM with β-mannanase did not show negative responses on carcass characteristic as well as growth performance. Also, PKM treatment improved the economical profit by days to market weight and feed cost. Consequently PKM can be included up to 16% in diet for growing-finishing pig without detrimental effects on growth performance and pork quality.