Assessment of yeast supplementation on the onset of laying and subsequent performance of Shika brown layers fed high levels of rice bran during growing period

Abstract

The study assessed the effect of feeding grower pullets with high levels of rice bran supplemented with or without yeast (Saccharomyces cerevisiae) on sexual maturity and subsequent laying performance. The treatment groups were: treatment 1, 0% rice bran without yeast, treatment 2, 45% rice bran without yeast, treatment 3, 50% rice bran without yeast treatment 4, 45% rice bran supplemented with yeast and treatment 5, 50% rice bran supplemented with yeast. These diets were fed from the 9th to 20th week of age. Thereafter, a common layer diet was fed to all treatment groups from 20th - 40th week. Results of the study indicated that feeding rice bran at the growing phase did not affect age at point of lay. Indeed the birds fed rice bran diets without yeast reached point of lay earlier than the control group. Similarly, birds on high rice bran + yeast reached peak production earlier than the control group. However, hen-day egg production was higher for the birds fed control diet. It could be concluded therefore that feeding diets containing up to 50% rice bran with or without yeast supplementation during the growing phase did not adversely affect the onset of laying and subsequent performance of Shika brown pullets.

Keywords: Yeast, rice bran, pullets, egg