Table 3.

Effect of feed treatments on feed conversion ratio of broiler birds

Treatments	Year	Feed conversion ratio						Means
		W1	W2	W3	W4	W5	W6
T0	2013	2.10 ± 0.05	1.76 ± 0.05	1.86 ± 0.02	1.84 ± 0.02	1.91 ± 0.01	2.18 ± 0.02	1.94 ± 0.03a
	2014	2.02 ± 0.04	1.77 ± 0.02	1.87 ± 0.01	1.81 ± 0.03	1.92 ± 0.02	2.19 ± 0.04
T1	2013	2.12 ± 0.04	1.80 ± 0.06	1.77 ± 0.02	1.78 ± 0.04	1.89 ± 0.01	2.07 ± 0.04	1.89 ± 0.03ab
	2014	1.89 ± 0.05	1.82 ± 0.03	1.80 ± 0.03	1.78 ± 0.02	1.85 ± 0.05	2.09 ± 0.06
T2	2013	1.90 ± 0.07	1.78 ± 0.07	1.76 ± 0.05	1.73 ± 0.01	1.86 ± 0.01	1.97 ± 0.03	1.84 ± 0.02bc
	2014	1.917 ± 0.05	1.77 ± 0.06	1.77 ± 0.05	1.72 ± 0.05	1.87 ± 0.04	1.98 ± 0.01
T3	2013	1.84 ± 0.01	1.783 ± 0.05	1.60 ± 0.02	1.75 ± 0.02	1.78 ± 0.03	1.79 ± 0.04	1.77 ± 0.02 cd
	2014	1.89 ± 0.02	1.787 ± 0.03	1.60 ± 0.04	1.73 ± 0.02	1.77 ± 0.04	1.81 ± 0.05
T4	2013	1.85 ± 0.02	1.77 ± 0.04	1.85 ± 0.03	1.69 ± 0.01	1.94 ± 0.02	2.03 ± 0.01	1.87 ± 0.04b
	2014	1.96 ± 0.06	1.74 ± 0.02	1.83 ± 0.06	1.44 ± 0.04	2.33 ± 0.09	2.04 ± 0.03
T5	2013	1.87 ± 0.01	1.77 ± 0.06	1.51 ± 0.01	1.76 ± 0.03	1.79 ± 0.03	1.65 ± 0.03	1.73 ± 0.02d
	2014	1.85 ± 0.02	1.80 ± 0.03	1.52 ± 0.01	1.79 ± 0.04	1.78 ± 0.01	1.64 ± 0.02
T6	2013	1.85 ± 0.08	1.79 ± 0.06	1.42 ± 0.02	1.80 ± 0.03	1.78 ± 0.01	1.67 ± 0.02	1.72 ± 0.03d
	2014	1.91 ± 0.07	1.79 ± 0.05	1.45 ± 0.02	1.78 ± 0.02	1.78 ± 0.01	1.62 ± 0.01
T7	2013	1.91 ± 0.08	1.79 ± 0.03	1.68 ± 0.02	1.75 ± 0.03	1.76 ± 0.01	1.92 ± 0.05	1.80 ± 0.02c
	2014	1.84 ± 0.08	1.78 ± 0.03	1.68 ± 0.06	1.73 ± 0.01	1.79 ± 0.02	1.90 ± 0.05
T8	2013	1.88 ± 0.06	1.75 ± 0.02	1.37 ± 0.01	1.83 ± 0.04	1.75 ± 0.01	1.58 ± 0.01	1.70 ± 0.03de
	2014	1.93 ± 0.05	1.76 ± 0.04	1.38 ± 0.01	1.81 ± 0.04	1.78 ± 0.04	1.57 ± 0.02
T9	2013	1.88 ± 0.03	1.80 ± 0.05	1.34 ± 0.01	1.81 ± 0.02	1.71 ± 0.01	1.56 ± 0.01	1.68 ± 0.04e
	2014	1.94 ± 0.07	1.78 ± 0.08	1.31 ± 0.02	1.82 ± 0.02	1.74 ± 0.04	1.53 ± 0.02
Means		1.92 ± 0.02a	1.78 ± 0.01c	1.62 ± 0.02d	1.76 ± 0.02c	1.84 ± 0.02b	1.84 ± 0.03b

Data are means ± SE. Means sharing similar letters in a column do not differ significantly from one another (p˃0.05)

T0 = control without antioxidants, T1 = 100 mg quercetin + 150 mg α-tocopherol/kg feed; T2 = 100 mg quercetin + 225 mg α-tocopherol/kg feed; T3 = 100 mg quercetin + 300 mg α-tocopherol/kg feed; T4 = 200 mg quercetin + 150 mg α-tocopherol/kg feed; T5 = 200 mg quercetin + 225 mg α-tocopherol/kg feed; T6 = 200 mg quercetin + 300 mg α-tocopherol/kg feed, T7 = 300 mg quercetin + 150 mg α-tocopherol/kg feed; T8 = 300 mg quercetin + 225 mg α-tocopherol/kg feed, T9 = 300 mg quercetin + 300 mg α-tocopherol/kg feed