R. Bras. Zootec.21/May/2025;54:e20220158.
Emulsifier in broiler diets containing deactived full-fat soybean
Karine Isabela Tenório
, Cinthia Eyng
, Ricardo Vianna Nunes
, Cristiane Regina do Amaral Duarte
, Cleison de Souza
, Nilton Rohloff Junior
, Tânia Luiza Köhler
, Guilherme Luis Silva Tesser
ABSTRACT
This study aimed to evaluate effects of an emulsifier based on glyceryl polyethyleneglycol ricinoleate in diets containing deactivated full-fat soybean (DFFS) on performance, relative weight of pancreas, pancreatic lipase activity, intestinal morphometry, serum lipid concentration, nutrient digestibility, carcass yield, and meat quality of broiler chickens. Three hundred fifty-two male broilers (one-day-old) were randomly assigned to two dietary treatments including a diet containing DFFS without the emulsifier and a diet containing DFFS with emulsifier (350 g ton−1). Each treatment had eight replicates with 22 birds each. The metabolizable energy level was reduced by 40 kcal kg−1 from 1 to 21 d and 50 kcal kg−1 from 22 to 49 d in diets containing the emulsifier. Birds fed diets without emulsifier showed higher weight gain (P = 0.014) and feed intake (P = 0.048) from 1 to 7 d and greater feed conversion ratio (P = 0.044) from 1 to 35 d. On days 14 and 21, the inclusion of emulsifier in the diet did not affect (P>0.05) the intestinal morphometry, relative weight of pancreas, and pancreatic lipase activity. Serum lipid levels measured at 14, 21, and 29 d were also not affected by the emulsifier (P>0.05). At 49 d, broilers fed diets without emulsifier had decreased energy utilization (P<0.0001) and ileal digestibility of dry matter (P = 0.0001), gross energy (P<0.0001), and crude protein (P = 0.038). A higher breast yield (P = 0.039) was observed for birds fed diets without emulsifier. Meat quality parameters were not altered (P>0.05). The inclusion of the emulsifier in energy-restricted diets containing DFFS does not improve performance of broiler chickens, reduces the ileal digestibility of nutrients, without changes in morphophysiological parameters or meat quality of broilers.