Document Type : Research Paper

Authors

1 Postgraduate of Master Science, Department of Animal Science, Faculty of Agriculture, Razi University, Kermanshah, Iran

2 Assistant Professor, Department of Animal Science, Faculty of Agriculture, Razi University, Kermanshah, Iran

3 Assistant professor, Department of Animal Science, Faculty of Agriculture, Bu-Ali Sina University, Hamedan, Iran

Abstract

This experiment was conducted to investigate the effects of various levels of cichorium intybus and
copper on performance and egg yolk cholesterol. Total of 324 layer hens (Hy-Line W-36) were used in a
randomized complete blocks with nine treatments, three replications of 12 birds in each from 38 to 50
weeks of age. Experimental diets include control, four levels of copper (150, 200, 250 and 300 mg/kg)
and four levels of cichorium intybus (15, 20, 25 and 30 percent of diet). Different levels of cichorium
intybus and copper significantly decreased serum and yolk cholesterol than control. The level of 300
mg/kg copper significantly reduced serum and yolk cholesterol but significantly decreased egg weight,
egg production and increased feed conversion ratio compared to control. Levels of 25 and 30 percent of
cichorium intybus significantly decreased egg production than control treatment. Yolk color improved by
different levels of cichorium intybus than control and copper levels. In conclusion, the best result for
lower yolk cholesterol were achieved by those laying hens fed a diet with 150 mg/kg copper of diet or 15
percent of cichorium intybus.

Keywords

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