Performance and Egg Quality Characteristics of Laying Birds Fed Diets Containing Rice Bran with and Without Yeast Supplementation
A total of 120 birds were divided into 5 groups of twenty four birds each. Each group was regarded as treatment. The treatment was subdivided into 3 groups of 8 birds each as replicates. Treatment 1 served as control diet with no rice bran and yeast supplementation, diet 2 and 3 contained 30 and 35% rice bran without yeast supplementation, respectively. Diets 4 and 5 were the same as diets 1 and 2 except that 2 g kg-1 of yeast was added to each. Between 45th and 50th week of age of the birds egg quality trial was conducted to assess haugh unit, shell thickness and yolk index. Results of feed intake, hen day egg production, feed conversion ratio and mortality were not significantly (p<0.05) influenced by dietary treatments. Haugh unit, yolk index and average weight of egg did not vary significantly (p<0.05) between treatments, however, shell weight and shell thickness were significantly affected by the treatments. Total cost of production was higher (p<0.05) for the control group compared to treatments 2, 3 and 5. Revenue generated from sale of eggs was higher for birds on treatment 4 compared to those on treatments 1 and 5 (p<0.05). Net farm income was higher for treatments 2, 3 and 4 compared to the control. It could be concluded from the results of this study that performance of birds was not affected by the levels of rice bran with and without yeast supplementation. However, shell thickness, shell weight and net farm income were significantly affected by the treatments.
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