Efeito de emulsificante sintético na qualidade de pellet, na digestibilidade de nutrientes e no desempenho de frangos de corte

Abstract

The present study evaluated the utilization of a fat emulsifier based on glyceryl polyethylene glycol ricinoleate in the diet of chickens on the pellet quality, productive performance and digestibility of nutrients. A total of 980 one-day-old male chickens (Cobb 500) were distributed in a completely randomized block design according to the initial weight, in a 2x2x2 (two physical forms of diets, presence or absence of emulsifier, and two levels of energy) factorial. The experimental period was from 1 to 28 days. The treatments were: T1 – crumbled diet, without emulsifier and with conventional energy (3000 kcal); T2 – mashed diet, without emulsifier and with conventional energy; T3 – crumbled, without emulsifier and with reduced energy (2900 kcal); T4 – mashed, without emulsifier and with reduced energy; T5 – crumbled, with emulsifier and conventional energy; T6 – mashed, with emulsifier and conventional energy; T7 – crumble, with emulsifier and reduced energy; and T8 – mashed, with emulsifier and reduced energy. Data were submitted to analysis of variance (ANOVA) and the means were compared by Tukey test at 5% of significance. Both productive performance and nutrient digestibility were not affected by the addition of the emulsifier to the diets, except for AMEn, which increased in both types of diets. However, the addition of emulsifier increased both the hardness of the crumble diet and the water activity. It is concluded that the use of fat emulsifier based on glyceryl polyethylene glycol ricinoleate in the diet of chickens did not provide beneficial effects on productive performance and digestibility of nutrients under the conditions in which the study was executed.