The study was conducted with sixty 36 weeks old Lohman brown hens. According to the type of lipotropic factors supplemented to the basal ration the birds were divided into three main groups, each one consisting of 20 laying hens placed in separated rooms and classified as follows: Group I: (control group), comprised 20 laying hens, they were fed on a basal diet only, used as control for all experimental groups. Group II: (Choline supplemented group) including 20 laying hens, they were fed on a basal diet supplemented with Choline, where Choline was added as double amount to the basal ration (1500 mg/kg ration). Group III: (L-Carnitine supplemented group) consisted of 20 laying hens, they were fed on a basal diet supplemented with L-carnitine, where L-carnitine was added to the basal ration at the concentration of (500 mg/kg). Random blood samples were collected six times, from each group, at biweekly intervals, from the onset of lipotropic factors supplemented to the basal ration. Blood samples for serum separation were obtained from the wing vien from all groups (control and experimental groups). We can be concluded that there was mostly, an increase in all serum lipid fractions and some lipoprotein profiles with decrease in serum NEFA and increase in serum lipase activity during supplementation of laying hens with choline, and L-carnitine. Which did increase all serum lipid and lipoprotein profiles except serum NEFA during egg production period. It can therefore, be argued that they are potential agents for reducing the incidence of metabolic disease like sudden death syndrome in laying chickens obtain a maximum rate of egg production, treatment and prevention of fatty liver. |
