F. O. Jemiseye, O. A. Ogunwole


Effects of serial dietary supplement of selenium and vitamin E on performance of laying hens, egg quality attributes and deposition of selenium and vitamin E in eggs were evaluated.  ISA brown pullets (n=192) at week 31 of age, weighing 1.38±0.11kg were assigned to six experimental diets. Basal diet (T1) was without supplemental selenium and vitamin E while diets T2, T3 and T4, contained 0.5, 1.0 and 1.5 mg/kg selenium, respectively. Other diets (T5 and T6) were supplemented with 20 and 40 mg/kg vitamin E, respectively. Each treatment comprised four replicates with eight birds per replicate allotted in a completely randomized design. Hen day egg production of hens on T2 (47.23 %) was highest. Other indices of performance were not significantly (p<0.05) affected by supplemental selenium and vitamin E. There was no effect (p>0.05) of treatment on egg length and shell thickness. However, egg weight, egg diameter, shell weight and shell ratio differed significantly (p<0.05). Hens on T6 had the highest egg weight (62.56 g) and egg diameter (44.22 mm). Eggs from hens on T1 had highest shell weight of 6.03 g and shell ratio of 10.50 among others. Supplemental selenium and vitamin E had no significant (p>0.05) effect on albumen weight, albumen diameter, yolk height, yolk colour, and yolk albumen ratio. However, albumen length and yolk weight significantly (p<0.05) increased with T2 (110.11) and T6 (15.13), respectively. Haugh unit were higher for eggs of hens on T4 (76.85) and T5 (80.04). Vitamin E deposition in eggs increased significantly (p<0.05) with dietary vitamin E from 1.08 mg/100 g in T1 to 1.26 mg/100 g in T6. Lower supplemental selenium enhanced egg production while increased supplemental vitamin E improved egg quality parameters and vitamin E deposition in egg.


Hens laying performance, Supplemental vitamin E and selenium, Vitamin deposition, Egg quality attributes

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