Improved Productivity and Health of Broiler Chicken by Micro Green Alga Chlorella vulgaris

Background and Objective: Algae provide an alternative food source for poultry.They are considered the most important food supplement of the 21st century as a source of proteins.The aim of study was to estimate the growth performance and health of commercial broiler chicks with watering alga culture and alga culture after freezing and thawing.Materials and Methods: A total number of 135 one week broilers (Cobb breed) chicks were randomly distributed into 3 treatments with 3 replicates of 15 chicks in each in a completely randomized design.Three experimental groups were fed this diet.The 1st group as a control, 2nd and 3rd groups were treated with 5 g of alga (Chlorella vulgaris) per L of water supplemented as freezing and thawing (T 1 ) and as fresh (T 2 ) and these two groups were not treated with vaccine against lasota disease at 21 days.The data obtained were analyzed statistically using the one-way ANOVA procedure of SPSS with Duncan ʼ s multiple range test.Results: The results indicated that control group has the best means of body weights but T 1 has best feed conversion ratio (FCR) as compared to (T 2 ) and the control group.Also, the results showed that birds watering freezing alga had significantly improved performance index than birds drank fresh alga and control groups.Abdominal fat was significantly (p<0.05)lower of treated algae groups (T 1 and T 2 ) than control.Means of the relative weights of lymphoid organs for groups showed that the bursa and thymus were significantly increased (p<0.05) for (T 1 ) and (T 2 ) groups compared with the control one while, spleen had insignificant increase.In the present study there were significant (p<0.05)decrease in blood serum concentration of cholesterol, triglycerides, creatinine, AST, ALT of (T 1 ) and (T 2 ).Total protein and globulin were significantly improved for levels of serum (T 1 ) and (T 2 ) compared with the control group.Economic efficiency of birds treated with Chlorella alga was superior to that of the control group.Conclusion: The result in this study demonstrated that Chlorella alga could be safely used in broiler watering without treated with vaccine against lasota disease at 21 days.