EVALUATION OF GROWTH PERFORMANCE AND ECONOMIC ANALYSIS OFBROILER CHICKS FED PLANT DIETS SUPPLEMENTED WITH SOME FEED ADDITIVES

An experiment was inducted to determine the effects of betaine, enzyme mixture or L-carnetine as feed additives on growth performance, carcass characteristics and economic efficiency of broiler chicks. A total number of 120 one week old Hubbard broiler chicks were classified into 4 equal groups, each was subdivided into 3 replicates with 10 chicks.
The 1st group was fed basal diet without supplementation (control), while the 2nd (T1), the 3rd (T2), and the 4th groups were fed the basal diets supplemented with betaine, enzyme mixture and L-carnetime at the level of 1000 g, 500 g and 100 g/ton, respectively. Diets and water were provided ad lib. throughout the experimental period (1-5 weeks of age).
The results indicated that:
1- Body weight gain for the broiler chicks fed basal diets supplemented with enzyme mixture (T2) was significantly differences than those fed control diets at 1-3 wks and 4-5 wks of age. However, during the whole experimental period (1-5 wks), chicks fed basal diets + different feed additives (T1, T2 and T3) gave insignificantly higher live body weight gain compared to the fed control diets.
2- Feed conversion ratio (FCR), during whole experimental period, chicks fed T2 diets had significant better FCR (1.54), on contrary groups fed control basal diets or T1 and T3 diets recorded the worst FCR being 1.65, 1.63 and 1.64, respectively, due to the insignificant increased of feed consumption.
3- Carcass characteristics parameters (dressing, reading to cook and abdominal fat %) and carcass parts % (breast, thigh, drumstick and wing %) showed insignificant figures when chicks fed different dietary treatments.
4- Bone measurements (wet tibia weight, tibia length, tibia width and tibia seedor index) showed insignificant figures when broiler chicks fed different dietary treatments.
5- Blood parameters showed insignificant figures in most parameters. However total protein, globulin and triglyceride have significant difference for dietary treatments.
6- Economic evaluation the best economic efficiency value was demonstrated when broiler chicks fed 500 g/ton enzyme mixture and the value was (20%) more when compared with broiler chicks fed control diets.