Effect Of Lipase On Growth Performance And Nutrient Digestibility In Weanling Pigs

This study was conducted to evaluate the effect of different energy density and lipase supplementation on growth performance,nutrient digestibility and serum profiles in weanling pigs,and to provide theoretical and scientific basis for the application of lipase in feed industry.A total of 200 weanling pigs [(Yorkshire × Landrace)× Duroc)] with the average BW of 7.30±0.15 kg were used in a 28-day trial.Pigs were randomly allocated into one of the following dietary treatments based on the BW and sex: 1)T1,High Energy Treatment;2)T2,T1 with 500 g/t lipase;3)T3,Low Energy Treatment;4)T4,T3 with 300 g/t lipase.There were 5 replications per treatment with ten pigs per pen(five barrows and five gilts).The results indicated:(1)ADG and ADFI was improved(P<0.05)while F/G was decreased(P<0.05)by decreasing feed digestive energy level;(2)the supplementation of lipase increased ADG,ADFI,and F/G(P<0.05);(3)apparent digestibility of DM and GE was reduced with the decreasing energy density(P<0.05);(4)administration of lipase improved the apparent digestibility of EE(P<0.05),while tended(0.05<P<0.1)to increase DM,CP and GE;(5)lipase reduced serum BUN,TG,TC,HDL-C and LDL-C(P<0.05);(6)there was no interaction between energy and lipase(P>0.05).These findings suggested supplementation of lipase(300g/T)improved ADG,ADFI and the apparent digestibility of EE with the decrease of feed digestive energy 100 Mcal/T in the weanling piglets.