Effects Of Emulsifier On Nutrients Utilization, Growth Performance, And Meat Quality In Broilers

A metabolism experiment was conducted to study the effects of emulsifier on nutrient digestibility in broiler fed different diets. Night-six 36-day-old Arbor Acres broilers were divided into 12 treatments with 4 replicates. Treatmentâ… was fed basal diet only and Treatmentsâ…¡toâ…¤were fed basal diet supplemented with one of 4 levels of exogenous emulsifier (350, 500, 650 and 800 mg/kg of diet); Treatmentâ…¥toâ…§were fed diets contained ME levels of 2900, 3000, 3100kcal/kg, involving 650mg/kg emulsifier; Treatmentâ…¨toâ…ªwere fed diets contained soybean oil, fish oil and blended oil as fat source, respectively;Treatmentâ…«were used to determent the"Endogenous"nutrient production. A growth experiment was conducted to study the effects of emulsifier on growth performance, gastrointestinal tract and meat quality in broilers. A total of six hundred day-old Arbor Acres broiler chicks were randomly divided into 5 treatments with 4 replicates. One of the treatment was fed basal diet only (Control) and others were fed basal diet supplemented with one of 4 levels of exogenous emulsifier (200, 350, 500, and 650 mg/kg of diet).AME, TME, and apparent digestibility and true digestibility of GE and CF were significantly increased with the levels of emulsifier increase. As compared to the control group, AME, TME, and apparent digestibility and true digestibility of GE and CF was significantly increased (P <0.05) by supplementation of 650 to 800 mg/kg of emulsifier. However, there was no significant difference in DM digestibility (P >0.05) among all experiment diets. The apparent digestibility of GE and CF and the true digestibility of GE of the emulsifier treatments, which reduced 100 kcal/kg or 200 kcal/kg ME value of diet from the control diet, had no significant (P <0.05) different with the control while the true digestibility of CF was significant higher than the control (P <0.05).Broilers supplemented with 500 and 650 mg/kg emulsifiers significant improved (P <0.05) average daily gain, and reduced (P <0.05) the feed conversion ratio compared to the control in either phases or during the whole experimental period. There was no significant different (P>0.05) in average daily feed intake (ADFI) among treatments during the fist 3 wks of age or the whole experimental period. However, ADFI during the 21-42 d of age decreased significantly (P <0.05) in the diet with 500 and 650 mg/kg emulsifiers addition. Compare with the control, supplemented with 350, 500, and 650 mg/kg emulsifiers significant reduced the percentage of abdominal fat (P <0.05) and hepatic fat (P <0.05) at 21 and 42 days of age. There was no significant effect on the ratio of breast muscle.Supplemented with 500 and 650 mg/kg emulsifier significantly increased (P <0.05) the activity of amylase and lipase in gastrointestinal segments of broilers and HDL-CHOL in blood, and significant reduced the LDL-CHOL (P<0.05) and CHOL (P<0.05). There was a significant response to emulsifier at all levels of emulsifier supplementation in DM (P <0.05) of meat at 21 days and 42 days. At 42 days, 500 mg/kg and 650 mg/kg emulsifier supplementation had significant effect (P<0.05) on water holding capacity, a* value, and pH value of breast muscle.These results showed that: Supplementation of hydrophilic multi-emulsifier with HLB=12.2 in broilers diets could increase the ME of diet and nutrient utilization, and improved the average daily gain, and reduced average feed gain and feed conversion ratio. Emulsifier could increase the cycle of lipids in the body, and improve the deposition of fat while reduced the abdominal fat, and helping improve the muscle quality. Emulsifier can reduce serum cholesterol and LDL-CHOL, and increase the amylase and lipase activity in intestinal, and improve the absorption and development.