Estado oxidativo hepático y comportamiento productivo en pollos de engorda, alimentados con dos fuentes de selenio y niveles altos de vitaminas E y C

Abstract

THE EFFECT OF SUPPLEMENTING HIGH DOSES OF VITAMINS E, C, AND TWO SOURCES OF SELENIUM (SELENOMETHIONINE AND SODIUM SELENITE) IN DIETS ON BROILER CHICKS"" PERFORMANCE AND LIVER OXIDATIVE INJURY WERE EVALUATED LOOKING FOR A RELATIONSHIP BETWEEN BOTH EVENTS. SEVEN HUNDRED AND TWENTY ONE DAY OLD UNSEXED ARBOR ACRES BROILERS, HOUSED IN PENS WITH WOOD SHAVING LITTER AND STANDARD EQUIPMENT, WERE USED IN A COMPLETELY RANDOMIZED DESIGN AND DIVIDED IN THREE TREATMENTS: 1. CONVENTIONAL DIET; 2. CONVENTIONAL DIET PLUS 75 IU OF VITAMIN E PER KILOGRAM AND 400 PPM OF VITAMIN C; AND 3. DIET AS NUMBER 2, BUT INCLUDING SELENOMETHIONINE AS A SUPPLEMENTARY SOURCE OF SELENIUM. RESULTS OBTAINED FOR WEIGHT GAIN, FEED CONSUMPTION, FEED CONVERSION AND MORTALITY DUE TO ASCITES WERE SIMILAR AMONG TREATMENTS (P>0.05). HEPATIC LEVELS OF TOTAL GLUTATHIONE (TG) SHOWED A SIGNIFICANT VARIATION IN RELATION TO THE AGE OF THE BIRDS, AND WERE NOT AFFECTED BY THE EXPERIMENTAL DIETS. THE HEPATIC LIPID PEROXIDATION (LP) WAS REDUCED IN THE TREATMENTS WITH HIGH VITAMIN E AND C LEVELS, REGARDLESS OF THE SELENIUM SOURCE. AN INVERSE RELATIONSHIP BETWEEN TG AND LP HEPATIC LEVELS WAS FOUND. IT WAS NOT POSSIBLE TO FIND A CORRELATION BETWEEN THE HEPATIC OXIDATIVE STATUS NOR REGARDING THE BROILER PERFORMANCE.