ẢNH HƯỞNG CỦA VITAMIN E TRONG KHẨU PHẦN LÊN NĂNG SUẤT VÀ CHẤT LƯỢNG TRỨNG GÀ ISA BROWN
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To determine the effect of vitamin E supplementation at various concentration (0, 125 and 250 mg/kg of diet) on egg performance and egg quality of Isa Brown laying hens, a total of 90 layers at 53 weeks of age were randomly assigned into 3 treatments, 10 replicates of 3 hens each. The hens received either a basal diet (control) or basal diet supplemented with vitamin E at 125 (E125) and 250 mg/kg of diet (E250). The experiment was done in 8 weeks. The results showed that the hens fed diets supplemented with vitamin E increased laying rate (90.3-92.9%) and egg production (50.56-52 eggs) as compared to the control (89.5% and 50.12 eggs), however, there was no significantly different among treatments (p>0.05). Feed consumption of hens was significantly highest on the control diet and the lowest on E125 from 44-50 weeks of age (p<0.05). Similarly, the control diet had highest FCR as compared to the diets supplemented with vitamin E from 46 to 51 weeks (p<0.05). Egg weight, Haugh unit, yolk color and thickness of egg shell were significantly different among treatments (p<0.05). It is concluded that supplementing vitamin E improved the egg performance and some parameters of egg quality of hens.
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