بررسي اثر جايگزيني جوبه جاي ذرت در جيره هاي غذايي بر ميزان كلسترول تخم مرغ درمرغان بومي و اميخته هاي آنها با يك سويه مرغ تخمگذار تجاري

Study on the effect of replacement of corn with barley in diet on egg cholesterol in native hens and their crosses with a strain of commercial layer

This investigation was carried out to study the effects of different levels of barley and strain on egg-yolk cholesterol. Sixty laying hens, ( 30 native hens and 30 cross-breds) were used. Native hens similar to cross-breds were divided into three groups (10 hens per replication). Levels of replaced barley were zero, 15% and 30% in a corn-soybean meal basal diet. Therefore six treatments (2 strain X 3 ration) with ten replications considered in a completely randomized design for 6 weeks. The birds had free access to feed and water during experimental period. The results indicated that strain and interaction of strain and levels of substitution had a significant effect (p<0.05) on egg cholesterol. But barley inclusion had not significant effect on egg cholesterol. Yolk weight had a significant effect (p<0.001) on egg cholesterol. The results obtained showed that brley has not effect on egg cholesterol.