Effect fo mandarin orange [Citrus reticulata] rind supplementation on egg yolk beta-cryptoxanthin and laying performance in laying hens [Gallus gallus domesticus]
2006
Sasaki, K.(Mie-ken. Science and Technology Promotion Center, Ureshino (Japan). Livestock Research Division) | Tatsumi, T. | Ichikawa, T. | Ichinokiyama, H. | Mishima, T. | Goto, M.
An experiment was conducted to determine whether dietary mandarin orange rind (MOR) added pectinase supplementation for laying hens would have an influence on beta-cryptoxanthin content of egg yolk, egg quality and laying performance. Ten hens (41-wk-old) were fed experimental diet supplemented with either 0, 2 or 5% of MOR. The beta-cryptoxanthin content of egg yolk increased and reached a plateau at 14 days, and with 2-5% added MOR it was nearly 2-4 times as high as the control. The feed efficiency showed a tendency be better in the MOR diets than in the control diets. Egg shell quality and haugh units showed a tendency be more excellent in the MOR diets than in the control diets. These results suggest that MOR added pectinase may be used as farm product of improving egg quality by which the market value of eggs is elevated.
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