Effects Of Emulsified Oil On Feed Quality, Nutirents Utilization, And Growth Performance In Broilers

Three experiments were conducted in vitro and vivo to investigate the optimal conditionsof emulsification and the effects of emulsified oil on feed quality, nutrients utilization, andgrowth performance in broilers.A experiment was conducted to determine the optimal conditions of emulsification byinvestigating the effects of emulsifier amount, temperature, and ratio (vol/vol) of water andsoybean oil on the emulsification in vitro. A3×3×3factorial arrangement was designedwith three emulsifier amounts (0.4,0.5, and0.6g), three temperatures (10,20, and30°C),and three ratios (10%,20%, and30%). Six batches of each treatment were prepared by addingsoybean oil (100ml) directly to emulsifier aqueous solution. Subsamples were taken todetermine the demulsification time, particle diameter of droplet, PV, and AV.The result of this experiment indicated: the emulsifier amount, temperature, and ratio ofwater and oil all significantly affected the demulsification time (P <0.05) and PV (P <0.001),had no effects (P>0.05) on the particle diameter of droplet and AV. Increasing of emulsifieramount, temperature, and ratio of water and oil increased (P <0.05) demulsification time anddecreased (P <0.001) PV. Therefore, high levels of emulsifier amount, temperature, and ratioof water and oil were the optimal condition in this experiment.A experiment was conducted to compare the effects of emulsified oil with soybean oil onthe quality of broiler feed differing in type (mash and pellet) and feeding stage (starter, grower,and finisher) in vitro. The treatments were supplemented with different levels of soybean oil(Control) and emulsified oil. Four batches of each treatment were made at the beginning ofthe experiment and stored at20°C. Subsamples were taken at15-d intervals to determine themoisture content, weight loss percentage, PV, AV and total fungal counts over a45-d period(mixing uniformity of lipid and fines percentage were only determined at d0).The result of this experiment indicated: replacing soybean oil with emulsified oil inbroiler feeds had no effects (P>0.05) on the mixing uniformity of lipid, AV, and totalfungal counts, reduced (P <0.05) the fines percentage in grower and finisher pellets,increased (P <0.05) the moisture content, decreased (P <0.05) the weight loss percentageand PV of both pellet and mash feeds. Supplementation of emulsified oil decreased weightloss, increased pelletability, moisture content, and oxidation stability without affectingmixing uniformity of lipid and fungal growth in broiler feeds. A metabolism experiment was conducted to study the effects of emulsifier andemulsified oil replacing different ratio of oil on nutrient digestibility in broilers. Thirty-six36-day-old Ross308broilers were divided into8treatments with4replicates. Treatment1was fed basal diet and Treatments2to4were fed diets supplemented with100,120, and140mg/kg emulsifier replacing10%,20%, and30%soybean oil. Treatments5to7were fed dietsupplemented with emulsified oil (the soybean oil content in emulsified oil were equal toTreatments2to4). Treatment8were used to determent the “Endogenous” nutrient production.A growth experiment was conducted to study the effects of emulsifier and emulsified oilreplacing different ratio of oil on growth performance of broilers. A total of840one-day-oldRoss308chicks were randomly divided into7treatments with4replicates. Treatments werethe same as the Treatments1to7in the metabolism experiment.The result of this experiment indicated: replacing20%and30%soybean oil with120and140mg/kg emulsifier significantly increased (P <0.05) apparent digestibility and truedigestibility of CF, AME, and TME. Replacing30%soybean oil with140mg/kg emulsifieralso increased (P <0.05) apparent digestibility and true digestibility of DM; The apparentdigestibility and true digestibility of CF, GE, DM, AME, and TME were significantlyincreased (P <0.05) by supplementation of emulsified oil containing90%,80%, and70%soybean oil in Control. Replacing10%soybean oil with100mg/kg emulsifier increased (P <0.05) ADG; supplementation of emulsified oil containing90%and80%soybean oil inControl significantly (P <0.05) increased ADG and reduced the ratio of feed intake andweight gain (F:G).In conclusion, high levels of emulsifier amount, temperature, and ratio of water and oilwere the optimal condition in this experiment; supplementation of emulsified oil instead ofsoybean oil slightly improved the broiler feed quality; nutrient digestibility and growthperformance in broilers were improved by supplementation of emulsifier and emulsified oilreplacing an acceptable ratio of soybean oil.