Effects of Dietary Palm Kernel Meal with ß-mannanase on Growth Performance, Blood Profile, Pork Quality and Economic Analysis in Growing-finishing Pig

International price of swine feed ingredients such as corn and soybean meal has increased continually due to soaring oil price and increasing bio-fuel production. Palm kernel meal (PKM) can be one of alternative ingredients in swine feeds because of its extensive availability, adequate nutrients, comparable price and large amount of production. Therefore, this experiment was conducted to evaluate different levels of dietary PKM 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 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 PKM in experimental diet (0, 4, 8, 12 or 16%). Blood profiles, pork quality and economic analysis were evaluated. Data were analyzed by analysis of variance using the general linear model procedure of SAS.

In feeding trial, there was no significant difference in growth performance among treatments. However, ADFI was increased (linear, P< 0.05) when pigs were fed high PKM diet during the whole experimental period. In BUN concentration, no difference was observed among treatments. The pork pH and proximate analysis of longissimus muscle (LM) were not affected by dietary treatments. In pork color, a* and b* values, were not significant differences among dietary treatments. However, L* value was decreased as dietary PKM level increased. In addition, significant differences were not observed in shear force and water holding capacity (WHC) by dietary PKM with β-mannnanase. Cooking loss was linearly higher when PKM level increased (P < 0.05). In fatty acid composition, C16:0, SFA were increased (linear, P< 0.05) and USFA, USFA/SFA ratio were linearly decreased as pigs were fed higher PKM treatment diets. The value of TBARS tended to decrease when pigs were fed high PKM treatment diets. When pigs were fed diets containing PKM with βmannanase, days to market weight was reached earlier compared to basal diet and feed cost was also decreased by supplementation of PKM.

This experiment demonstrated that supplementation of PKM with ß-mannanase in diets of growing-finishing pigs did not show negative responses in growth performance and pork quality. And the highest economical profit was obtained when dietary PKM was supplemented at 8%.

Disclosure of Interest: None Declared.