Effect Of Lipase And Emulsifier On Performance And Nutrient Utilization Of Broilers

The paper is composed two tests, under the same diet type and oil addition level, thebasal diet consisiing of corn-soybean-mixed meal, the objective of this study was to evaluatethe effects of lipase and emulsifiers in broiler diet and in order to provide the theory basis forits reasonable application in broiler production.Trial1Effects of Different Type Oil and Lipase on Growth Performance and NutrientsUtilization of the Broiler DietThis study was conducted to evaluate the effect of different type oils and lipase ongrowth performance and nutrient utilization of broilers. Six hundred fourty1-d-old A×Abroiler chicks were randomly allocated into8dietary treatments (4different oils x2levels ofadded lipase). Four oils consisted of rapeseed oil, tallow, blend oil and no oil which is thecontrol group. There is5%base diets replaced with oils.The experiment duration is3weeks.Each treatment has8replicate pens with10birds per pen. Results of the experiment showedthat addition lipase in brolier's diet have not significantly difference on the average dailygain(ADFI),average daily gain(ADG) and feed conversion ratio(FCR)(P>0.05). Additiveslipase in brolier's diet have significantly improve the apparent metabolism energy (AME)concentration(1-3w), and significantly improve the three-week-old broiler's apparentdigestibility of crude protein (CP) and ether extract (EE) and ileal digestibility(P<0.05).Rapeseed oil groups significantly improved the ADG comparing with the broilersfed on diet containing tallow and control group (P<0.05). and have not significantlydifference on blend group(P>0.05).The control group significantly improved FCR comparingwith the broilers fed on diet containing oils group (P<0.05). Rapeseed and blend oil groupssignificantly improved the apparent digestibility of Dry mateer(DM), CP, EE,and grossenergy(GE) and AME concentration comparing with the broilers fed on diet containingtallow and control group(P<0.05). The results showed that the effect of rapeseed oil wasbetter than that blend oil and tallow oil, and lipase improved feed digestion and nutritionutilization and AME concentration on broilers.Trial2Effects of Different of Emulsifiers On Growth Performance and Nutrients Utilization of the Broiler DietThis study was conducted to evaluate the effect of different emulsifiers on growthperformance and nutrient utilization of broilers. Six hundred seventy-two1-d-old A×Abroiler chicks were randomly allocated into6dietary treatments (2different fats x3differentemulsifiers) and no emulsifier which is the control group.The experiment duration is6weeks.Each treatment has8replicate pens with14birds per pen. Results of the experiment showedthat addition emulsifier B2in brolier's diet(22-42d and1-42d) have significantly improveADG comparing with the emulsifier B3and control group(P<0.05). Additives emulsifier B2in brolier's diet have significantly improve the ADFI comparing with the controlgroup(P<0.05). Additives emulsifier B2and B3in brolier's diet tended to descreased FCR.Additives emulsifier in brolier's diet have significantly improve the broiler's (1-21d)apparent digestibility of DM, EE and AME concentration comparing with the controlgroup(P<0.05).Tallow oil significantly improved the ADFI, FCR comparing with the broilersfed on diet containing Rapeseed oil (P<0.05),and the broiler's ADG have not significantlydifference between two group(P>0.05). Rapeseed oil groups significantly improved theapparent digestibility of EE, GE and AME concentration comparing with the broilers(1-42d)fed on diet containing tallow oil(P<0.05). The test showed that emulsifier improvedon growth performance and nutrients utilization of the broiler diet.