بررسی24 روز تغذیه ال-آرژنین بر عملکرد، کیفیت گوشت و فراسنجه‌های خونی جوجه‌های گوشتی

Background: for the reason of lower carcass quality because of geneticimprovement, finding a natural way to improve growth and meat quality is necessary. objectives: the present study was designed to investigate the effects of dietary supplementation of l-arginine on growth performance, carcass quality, and blood metabolites of female ross308 broiler chickens for 24 days. methods:in this experiment, 192- day -old female chicks were fed with 4 dietary treatments, 4 replications, and 12 observations in a completely randomized design. dietary treatments were 100%, 153%, 168% and 183% of digestible arginine, based on the ross broiler recommendation. diets were fed from 1 to 24d. on 10th and 24th days of experiment, birds weighed and feed consumption were recorded. at the end of experiment, three chickens per replication were selected; blood samples were collected and were euthanized to determine meat quantity and quality, and blood metabolites. results: results showed that diet containing 168% arginine had the highest body weight, feed efficiency, and weight of breast and thigh muscles, while diet containing 183% arginineshowed the highest meat redness index and plasma thyroid hormone concentrations (p < 0.05). on the other hand, increasing in arginine of the diet reduced plasma concentrations of triglyceride, and urea, shear force and ph of the meat. conclusions: in conclusion, the overall results of this study showed that consumption level of 168% digestible arginine, as based of ross broiler recommendation, had the best desirable results on growth, meat quality andplasma metabolites.