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Levels of supplementation of inorganic selenium and vitamin E for meat quail aged 0 to 14 and 14 to 35 days

Zancanela, V., Furlan, A. C., Pozza, P. C., Marcato, S. M., Grieser, D. O., Stanquevis, C. E., Finco, E. M., Oliveira‐Bruxel, T. M., Ferreira, M. F. Z.
Journal of animal physiology and animal nutrition 2018 v.102 no.2 pp. e918
carcass yield, diet, feed conversion, feed intake, meat, quails, selenium, vitamin E, weight gain
Two experiments were carried out to determine the levels of supplementation of inorganic selenium (Se) and vitamin E (VE) in diets of quails aged 0–14 and 14–35 days old. A completely randomized design was used in a factorial design (Se = 0.1125; 0.2250; 0.3375 and 0.4500 mg kg⁻¹ diet⁻¹ × VE = 10; 23; 36 and 49 IU kg⁻¹ diet⁻¹). In experiment 1, quail (n = 2,400) were aged 0–14 days and were divided into 16 treatments, with three replicates of 50 birds. In experiment 2, quail (n = 1,680) were aged 14–35 days and were divided into the same treatments, with three replicates of 35 birds. At age 0–14 days, the levels of VE did not affect performance (p > .05); however, the feed conversion (FC) was influenced by a quadratic effect (p = .0515), according to the level of Se, with a higher level estimated at 0.29 mg Se kg⁻¹ diet⁻¹. At age 14–35 days, there was a linear effect with interaction (Se × VE), for FC (p = .0150) and weight gain (WG; p = .0266). FC (Se, p = .0048 and VE, p = .0019) and WG (Se, p = .0049 and VE, p = .0068) improved linearly with increasing levels of Se and VE. The feed intake (FI) decreased linearly (p = .0582) as a function of VE. The carcass yield showed a quadratic effect (p = .0056) on the levels of VE, with a higher yield estimation of 27.24 IU VE/kg of diet. It can be concluded that the optimum level of supplementation at age 0–14 days was 0.29 mg Se kg⁻¹ diet⁻¹ and 10 IU VE kg⁻¹ diet⁻¹ and at age 14–35 days, it was 0.4500 mg Se kg⁻¹ diet⁻¹ and 49 IU of VE kg⁻¹ diet⁻¹.