Abstract
The objective of this study was to evaluate whether the addition of a blend based on α-monolaurin mono-, di- and triglycerides of butyric acid, and lysolecithin on the performance even on diets containing reduced inclusion of oil in the diet and without the use of growth-promoting antibiotics of broilers considering the effect on health, performance, and meat. Three treatments were defined: positive control (TP: with enramycin), negative control (TN: no enramycin), and blend (T-FRA: with monolaurin and glycerides of acid butyric minus 0.8% soybean oil). At 21 days, broilers treated with TP and T-FRA obtained the lower feed conversion ratio (FC); at 35 days, T-FRA broilers obtained lower FC than TN broilers. Cholesterol levels were higher in the blood of T-FRA broilers. On day 42, levels of ROS and TBARS were lower in the intestine, muscles, and liver of T-FRA broilers. Moreover, glutathione S-transferase and total non-enzymatic antioxidants were greater at the intestinal and muscular levels. The T-FRA broilers had a lower percentage of lipids in the meat. The MIC indicated that 111mg of the blend/mL inhibited the growth of E. coli; however, the counts of total coliforms and E. coli in the feces and the broilers' litter did not differ between treatments. In conclusion, the addition of the blend T-FRA in broiler diets was able to improve the feed conversion and maintain the other performance parameters even considering a reduction of 0.8% in the inclusion of oil.
Highlights
Brazil is currently the second-largest exporter of chicken meat after the US, and it is expected that by 2029, Brazil will have taken the lead
There have been a public call for restricting antimicrobials in animal feed, and several antibiotics have already been banned in various countries
The objective of this study was to determine whether the inclusion of a blend based on mono, di- and triglycerides of butyric acid, α-monolaurin, glycerol, and an emulsifier would substitute for a conventional antibiotic as a performance enhancer
Summary
Brazil is currently the second-largest exporter of chicken meat after the US, and it is expected that by 2029, Brazil will have taken the lead. The country is in third place in global production of chicken meat up to 13.6 million tons according to Sindorações in 2019. The technology used in the poultry industry has been exploited to optimize production, improve financial results and produce safer and healthier food. There have been a public call for restricting antimicrobials in animal feed, and several antibiotics have already been banned in various countries. Due to this need for alternatives, the industry has produced natural additives and used them in poultry production, providing favorable conditions for the growth of beneficial microorganisms in the
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