Nutritional Studies In Some Feed Additives As Growth Enhancers In Broiler Chick Diets

The use of antibiotics as growth promoters in animal nutrition is facing reduced social acceptance due to the appearance of residues and resistant strains of bacteria; antibiotic use has been banned in the European Union since January 2006. Bans on the usThe present study was conducted in two experiments.Experiment I: was conducted to study the effect of dietary supplementation of 2 commercial products of probiotics (Biogreen-E and CloSTAT) and two types of phytobiotic (1% dried rosemary and 1% dried peppermint) as alternative growth promoters to antibiotExperiment II: was conducted to study the effect of substitution of inorganic chelates of zinc and manganese (oxide and sulphate respectively) with their organic sources (zinc and manganese glycine).Both experiments were conducted to study their effects on:(1) Growth performance of broiler chickens (body weight, body weight gain, feed intake, feed conversion ratio, RGR and PER). (2) Carcass quality traits. (3) Some serum biochemical parameters as cholesterol, triglyceride, HDL, LDL, glucose, total protein,