Interação entre densidade específica do milho e aflatoxinas no desempenho de frangos de corte

Abstract

This study aimed to evaluate broiler performance in two diets with different corn densities, with and without aflatoxins (2.8 ppm), until 42 days of age. The experiment was carried out using 1.080 Cobb one-day-old chicks randomly distributed on four treatments designed by corn density with or without aflatoxins: corn of high (T1=formulated ration with corn of high density; T2= formulated ration with corn of high density + 2.8 ppm of aflatoxin; T3= formulated ration with corn of low density; T4= formulated ration with corn of low density+ 2.8 ppm of aflatoxin). Birds were kept into battery until 14 days and transferred to floor pen boxes afterwards. Slaughterings were weekly carried out to evaluate the following parameters: feed consumption, body weight, feed conversion, relative liver weight and biochemistry parameters (total plasmatic protein, albumin, total cholesterol, HDL cholesterol, triglycerides, calcium and phosphorus). Body weight was affected by different corn densities and presence of aflatoxins at 42 days of experiment. Feed consumption was lower on birds intoxicated with aflatoxins, especially on intoxicated with aflatoxins and fed by low corn density. Furthermore, relative liver weight, total plasmatic proteins levels, albumin, total cholesterol, HDL cholesterol, triglycerides and calcium were also affected by presence of aflatoxins on the diet with on interference of corn density used on ration formulation. Based on these results, it can be concluded that corn density interferes on the performance when used in ration formulation and aflatoxins interferes on several productive and biological parameters of broilers. A synergism between aflatoxins and low nutrion quality was pointed out, increasing the damages. Keywords: mycotoxins, nutrition, clinical biochemistry, broilers, performance.