Uso de emulsificante em dietas para frangos de corte

Abstract

Two experiments were carried out to evaluate the effects of an emulsifieradditive on nutrient digestibility and apparent metabolizable energy corrected for nitrogen (AMEn) to broilers chickens receiving diets with different levels of soybean oil in the starter (14-21d) and finisher (35-42d) phase of bird’s age. The experiments 1 and 2 were conducted using mash corn/soybean and/or meat bone meal-based diets with or without inclusion of emulsifier (0.35g/kg of feed) and five levels of soybean oil (0; 15; 30; 45; 60g/kg). A total of 600 male broilers Cobb 500 in the starter and 360 broilers in the finisher phase were allocated (metabolic cages) in a complete randomized design (CRD) with 10 treatments and 6 reps each. Total excreta method was carried out to determine AMEn and coefficient of total tract apparent digestibility for dry matter, crude protein and ether extract. Data were submitted to ANOVA and contraste test among treatments. Experiments 1 and 2, the emulsifier had no effect (P>0.05) on crude protein in the different ages evaluated. Overall, in the all-metabolic trials, when all treatments with and without emulsifier were compared, there were significant (P<0.05) improvements on EMAn, ether extract and dry matter digestibility in the treatments supplemented with emulsifier. In the experiment 2, using diets based on meat bone meal, the emulsifier had a better effect (P<0.05) on ether extract in diets formulated 30, 45 and 60g/kg of soybean oil in the finisher phase. The emulsifier had significant effect (P<0.05) on AMEn in diets with 30, 45 and 60g/kg of soybean oil inclusion in the experiment 1 and 2. In conclusion, the emulsifier-additive can improve nutrient digestibility and AMEn in diets formulated with 30, 45 and 60g/kg of soybean oil.TEIXEIRA, L. do V. Uso de emulsificante em dietas para frangos de corte. 2017. 84 p. Tese (Doutorado em Zootecnia)-Universidade Federal de Lavra,s Lavras, 2017.