Table 4.
The impact of dietary minerals (Zn-Cr and organic-Se) supplementation on broilers growth performance under heat stress conditions.
| Treatments | Live Body Weight, (g), Live BW |
Body Weight Gain, (g), BWG |
Feed Consumption, (g), FC |
Feed Conversion Ratio, FCR |
||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 7 | 21 | 35 | 8–21 | 22–35 | 8–35 | 8–21 | 22–35 | 8–35 | 8–21 | 22–35 | 8–35 | |
| (A) Effect of Zn-Cr mixture | ||||||||||||
| Without Zn-Cr | 152.70 | 827.09 b | 1824.43 b | 674.39 b | 997.34 b | 1671.73 b | 1089.04 | 2074.80 | 3163.84 | 1.62 b | 2.09 b | 1.90 b |
| With Zn-Cr | 155.48 | 913.30 a | 1967.67 a | 757.82 a | 1054.36 a | 1812.19 a | 1097.80 | 2022.76 | 3120.56 | 1.45 a | 1.92 a | 1.72 a |
| SEM | 2.73 | 12.72 | 12.01 | 10.63 | 8.90 | 10.23 | 10.87 | 19.41 | 16.68 | 0.02 | 0.02 | 0.01 |
| p-value | 0.4814 | 0.0001 | <0.0001 | <0.0001 | 0.0003 | <0.0001 | 0.5756 | 0.0742 | 0.0831 | <0.0001 | <0.0001 | <0.0001 |
| (B) Effect of organic Se levels | ||||||||||||
| Without Se | 151.74 | 852.82 | 1822.80 b | 701.08 | 969.98 b | 1671.06 b | 1094.55 | 2044.26 | 3138.81 | 1.57 | 2.12 a | 1.89 a |
| With LSe ≠ | 153.46 | 873.01 | 1921.85 a | 719.55 | 1048.85 a | 1768.40 a | 1079.75 | 2048.16 | 3127.91 | 1.51 | 1.96 b | 1.77 b |
| With HSe ≠≠ | 157.08 | 884.77 | 1943.49 a | 727.69 | 1058.72 a | 1786.41 a | 1105.96 | 2053.92 | 3159.89 | 1.53 | 1.94 b | 1.77 b |
| SEM | 3.34 | 15.58 | 14.71 | 13.01 | 10.90 | 12.53 | 13.31 | 23.78 | 20.42 | 0.02 | 0.02 | 0.02 |
| p-value | 0.5268 | 0.3619 | <0.0001 | 0.3550 | <0.0001 | <0.0001 | 0.3962 | 0.9591 | 0.5421 | 0.1926 | <0.0001 | 0.0001 |
| (A × B) Effect of interaction between Zn-Cr mixture and organic Se levels | ||||||||||||
| T1 | 149.91 | 807.77 c | 1714.22 d | 657.86 b | 906.45 c | 1564.31 e | 1080.06 | 2056.16 | 3136.22 | 1.65 a | 2.27 a | 2.01 a |
| T2 | 153.57 | 897.87 ab | 1931.38 ab | 744.30 a | 1033.51 ab | 1777.81 bc | 1109.04 | 2032.36 | 3141.40 | 1.49 b | 1.97 bc | 1.77 c |
| T3 | 152.63 | 832.50 bc | 1853.64 c | 679.87 b | 1021.14 b | 1701.01 d | 1086.53 | 2062.48 | 3149.01 | 1.60 a | 2.02 b | 1.85 b |
| T4 | 155.57 | 841.01 bc | 1905.44 bc | 685.44 b | 1064.43 ab | 1749.87 cd | 1100.52 | 2105.78 | 3206.30 | 1.61 a | 1.98 bc | 1.83 bc |
| T5 | 154.28 | 913.51 a | 1990.07 a | 759.23 a | 1076.56 a | 1835.79 a | 1072.96 | 2033.85 | 3106.81 | 1.42 b | 1.89 c | 1.69 d |
| T6 | 158.59 | 928.53 a | 1981.55 a | 769.94 a | 1053.02 ab | 1822.96 ab | 1111.40 | 2002.08 | 3113.48 | 1.45 b | 1.90 c | 1.71 cd |
| SEM | 4.73 | 22.03 | 20.81 | 18.41 | 15.42 | 17.72 | 18.82 | 33.63 | 28.88 | 0.03 | 0.03 | 0.02 |
| p-value | 0.8569 | 0.0046 | <0.0001 | 0.0012 | <0.0001 | <0.0001 | 0.6220 | 0.3992 | 0.2382 | 0.0002 | <0.0001 | <0.0001 |
a,b,c,d,e = means with different letters in the same column are significantly different at (p < 0.05). SEM, standard error of the mean. ≠ LSe = low selenium concentration, ≠≠ HSe = high selenium concentration. T1 = (basal diet, no additive), T2 = T1 + 100 mg Zn + 1.5 mg Cr/Kg diet (Zn-Cr), T3 = T1 + 0.6 mg Se/Kg, T4 = T1 + 0.9 mg Se/Kg, T5 = T1 + (100 mg Zn + 1.5 mg Cr + 0.6 mg Se) and T6 = T1 + (100 mg Zn + 1.5 mgCr + 0.9 mg Se).