Abstract—An experiment was conducted to elucidate the effects
of turmeric powder supplementation on egg production performance
of old laying hens (80 weeks of age). There were 40 hens of Hysex
Brown strain used in the study. They were caged individually, and
randomly divided into 4 treatment groups of diet containing 0
(control), 1, 2 and 4 % oven dried turmeric powder for 3 periods of 4
weeks; Egg production (% hen day) and feed intake of the 4
treatment groups at the commencement of the experiment were not
significantly different. In addition to egg production performance (%
and egg weight), feed and water intakes were measured daily, and
cholesterol content of the whole egg was determined. The results
indicated that feed intakes of the hen were significantly lowered
when 4% turmeric powder supplemented, while there were no
significant changes in water intakes. Egg production were
significantly increased and maintained at a higher level by turmeric
powder supplementation up to 4% compared with the control, while
the weight of eggs were not significantly affected. The research
markedly demonstrated that supplementation of turmeric powder up
to 4% could improve and maintain egg production performance of the
old laying hen at a higher level with a lower cholesterol content.
Keywords—Curcumin, feed and water intake, old laying hen, egg
production.