Crude Glycerin (Biodiesel By-product) as an alternative energy source in poultry diets

Abstract

Abstract This study was aimed to study the possibility of using glycerin (biodiesel by product) as alternative energy source in broiler diets and effects on productive performance ,biochemical blood , Carcass traits and organ weights. Two-Hundred forty broiler chicks (Ross 308), one day old were divided to five groups (0, 2.5 , 5 , 7.5 , and 10% supplemented with crude glycerin from 1 to 42 days), with four replicates per group (12 chick/replicate). Diets were formulated Iso-nitrogenous and iso-caloric to meet the requirements of birds. Nutrition were ad libitum. Body weight gain, feed consumption were recorded weekly. Results showed no significant differences between groups in performance treatments from those fed the control diet without crude glycerin. Birds in group 3 which received crude glycerin 5% at 14 days recorded highest body weight with better feed conversion ratio during over all experimental period , while birds in group 5 (10% crude glycerin recorded lowest body weight with worst feed conversion ratio. Also, the results of biochemical traits indicated no significant differences between treatments in total protein , albumin , globulin, Glucose, HDL ,VLDL, ALP , ALT and AST Enzymes at 42 days. On the other hand, birds in group 2 (addition 2.5% crude glycerin) recorded lowest value in Triglycerides, While group 3 (addition 2.5% crude glycerin) recorded lowest value in total Cholesterol and low density lipoproteins. No significant differences between treatments in Relative weights of Hot carcass yield, liver, Kidney, proventiculus , gizzard , Heart , Pancreas, spleen and Bursa, while significant decrease were observed in Relative weights of abdominal fat of birds fed diets with crude glycerin as compared with Control Group . We conclude from this work that diets supplementation with 5% crude glycerin can be used as an alternative source of energy, especially from 0 to 21 day .