Some Nutritional Studies on Feedstuffs and Concentrates in Poultry

The present study was conducted in two experimentsExperiment I: was conducted to study the effects of substituting corn by25 or 50% wheat, barley or rice meal.Experiment 11: was conducted to evaluate the effects of enzyme additionafter subsititution corn by 25 or 50% wheat and barley, 25% wheat bran or 25%rice bran.Both experiments were conducted to study their effects on, growthperformance of broiler chickens, histopathological changes, carcass qualitytraits, some serum parameters as total cholesterol, HDL, LDL and triglyceride., mineral content of bone (bone ashing), meat (mineral tissue content) andviscosity of the intesinal content and pH of the digesta were also measured. Thenutritive values of experimental diets used in expo I and II were determinedthrough digestibility trials.SummarySUMMARYThe present study was conducted in two experimentsExperiment (I)A total of 147 broiler chicks were used to study the effects of substitutingcorn by 25 or 50% wheat, barley or rice meal on:. 1- Growth performance of broiler chickens.2- Histopathological changes.3- Carcass quality traits.4- Some serum parameters (total cholesterol, HDL, LDL and triglyceride).5- Mineral content of bone (bone ashing), meat (mineral tissue content).Broiler chickens in this study were allotted into seven groups in eachcontained 21 birds, they were fed on isocaloric and isonitrogenous diets were and the feed and water were provided ad-libitum along the duration of the trialThe I st experiment extended for 6 weeks and the feeding period was divided into 2 stages: