الفهرس 
Experimental birdsOnly 14 pages are availabe for public view
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Abstract
In a trial to improve the colour of egg yolk, berseem leaf meal, squash, green pepper and curcuma were used as additives to the normal r a t i o n of laying hens. The effect of these additives on egg production, egg weight, fertility , hatchability and growth of chicks was also studied. Results of these experiments can be summarized as fol1ovis : - 1 - A l l the additives used improved the egg yolk colour by different degrees. The best colour was obtained by the addition of limited amounts of green pepper to the ration. Berseem leaf meal also gave good colours. The improvement of the yolk colour in these two cases can be explained on bases of the carotenoid content of these two materials, The addition of curcuma improved the egg yolk calour to a certain extent, and this may be due to tts colouring substance which is not of a carotenoid nature.