The Effects of Different Levels Chlorell Microalgae on Performance and Immune Response of Laying Hens Under Heat Stress Condition

Abstract

Article InformationThis study was conducted to determine The Effects of different levels microalgae Chlorell sp. on performance of laying hens under heat stress condition. A completely randomized design experiment, with 7 replicates and 6 treatments (9 birds per replicate) was carried out by allotting 378 white Lohman strain laying hens at 65 weeks of age. Six experimental trearments were continual addition of 0, 100, 200, 300, 400 ppm microalgae Chlorell and 400 ppm toein to drinking water were fed to laying hens for 9 weeks. Egg production, egg weight, egg mass output and feed intake were determined. Antibody production against sheep red blood cells (SRBC) also was measured. Data were analyzed by ANOVA using General Linear Models procedure of SAS software and comparison of means were compared using Duncan's multiple range test. The results of this experiment showed that microalgae Chlorell had no effect on productive performance. Adding microalgae Chlorell to the drinking water improved immune response of laying hens and a more positive effect was observed when 400 ppm added to the water. It is concluded that the addition of microalgae Chlorell to the water drinking of laying hens improved immune response of laying hens.