Effects of supplemental ractopamine and L-carnitine on growth performance, blood biochemical parameters and carcass traits of male broiler chicks
African Journal of Biotechnology
This experiment was conducted to consider the effect of ractopamine and L-carnitine as lipolytic agent and growth promoter on broiler chicks. Nine experimental diets were fed to 675 broiler chicks at the growth periods (3 to 6 weeks of age). Three levels of ractopamine (0, 5 and 10 mg/kg) and L-carnitine (0, 60 and 120 mg/kg) were fed. A completely randomized design with a 3 × 3 factorial arrangement was used. Growth performance, blood biochemical parameters and carcass traits were measured.
... s were measured. Results indicate that daily body weight gain (DBWG), feed intake (FI) and feed conversion ratio (FCR) were not affected significantly (p>0.05) by different levels of ractopamine and L-carnitine. Ractopamine (10 mg/kg) significantly (p<0.05) increased blood serum cholesterol and albumin levels. On the other hand, triglyceride, blood urea nitrogen and globulin were reduced (p<0.05) in 10 mg/kg of ractopamine. L-Carnitine (60 mg/kg) significantly (p<0.05) reduced triglyceride, blood urea nitrogen and albumin, but increased blood serum cholesterol and glucose levels. The lowest level of triglyceride was observed by diets 5 (5 and 60 mg/kg) and diet 8 (10 and 60 mg/kg), which contained with ractopamine and Lcarnitine, respectively. Carcass traits, except thigh and liver fat percentage were not influenced by added ractopamine. A significant (p<0.05) reduction was observed in abdominal fat pad due to supplemental L-carnitine. Liver fat content was significantly (p<0.05) reduced by (10 mg/kg) ractopamine. Blood biochemical parameters and some carcass traits of broilers were responsive to supplemental ractopamine and L-carnitine.