Abstract
Using White Leghorn hens which had been laying for four months from their first eggs. Feedig experiments were conducted to know whether fish meal was indispensable in laying ration for their egg production, feed conversion, body weight, mortality, hatchability and egg weight.
The results were as follows
1. When fed corn-soya laying ration contaning 14% crude protein, mortality clearly increased compared with the feeding of formulated ration containing 3-5% fish meal. But no difference was found in egg production performance.
2. When fed corn-soya laying ration containing 16% crude protein, fish meal was not indispensable as protein source in laying ration, but if B-Complex vitamin was not supplied the egg production and hatchability clearly decreased.
