α-AMILASE DE Bacillus licheniformis EM DIETAS PARA FRANGOS DE CORTE

Abstract

The emergence of the pandemic caused by the Coronavirus (Sars-Covid19), showed great effects on our national economy, walking in short steps during these two years, we have in current validity war between Russia-Ukraine and the recurring climate crisis, which challenges us to find solutions to produce food, specifically quality chicken meat at low cost, in which the prices of important agricultural products in the manufacture of feed, such as corn and soybeans, are high. Therefore, the objective was to evaluate the effect of including α-amylase from Bacillus licheniformis in the feed of broilers at 42 days of age on performance, carcass yield, gastrointestinal tract biometry, locomotor bone biometry, and blood biochemical profile. In the experiment, 100-day-old male Cobb® broiler chicks, uniformed by body weight, were used, distributed in a fully randomized experimental design (DIC), with two treatments (T1-control, T2-inclusion of the enzyme α-amylase) and five repetitions containing 10 birds per galvanized wire cage. Data were subjected to analysis of variance and parameters that showed differences by F-test at 5% probability with tukey test. The inclusion of the enzyme α-amylase from Bacillus licheniformis in diets for broilers in the period from one to 42 days did not harm the carcass yield and showed higher weight gain, better feed conversion, and greater length of the gastrointestinal tract. There were also changes in the biochemical profile of the blood with reduced calcium and triglyceride levels. The locomotor bones were not altered, which may indicate normal development of the chicks until their final stage and the absence of toxicity. Given the various possible scenarios, conflicts, and fluctuations in input prices, the use of the enzyme α-amylase in poultry production is beneficial because it improves the processes of digestion and absorption of nutrients present in food and enhances animal performance.