Table 2. The body weight and FCR of different broiler strains during 42 days’ period.
Parameters |
Week |
Cobb 500 |
Ross |
IR |
EP |
p-value |
Body weight |
Initial |
42.33±0.33 |
42.83±0.17 |
42.67±0.33 |
42.67±0.33 |
0.10 |
1st Week |
155.27a±1.79 |
152.33ab±0.33 |
146.73b±2.90 |
136.60c±0.42 |
<0.001 |
|
2nd Week |
476.67a±7.54 |
471.33a±1.86 |
451.00b±4.58 |
441.67b±4.41 |
0.003 |
|
3rd Week |
956.33±2.40 |
944.33±8.09 |
965.33±69.84 |
909.00±6.66 |
0.699 |
|
4th Week |
1577.80±49.36 |
1446.33±28.81 |
1540.00±85.05 |
1433.00±9.07 |
0.209 |
|
5th Week |
2218.60a±43.60 |
2074.17ab±34.60 |
2116.00b±51.39 |
1990.33b±5.49 |
0.017 |
|
6th Week |
2825.33a±22.36 |
2725.00b±17.56 |
2641.67c±19.22 |
2566.67d±8.82 |
<0.001 |
|
FCR |
1st Week |
0.99c±0.02 |
1.06b±0.00 |
1.08b±0.04 |
1.24a±0.01 |
<0.001 |
2nd Week |
1.01c±0.01 |
1.11bc±0.01 |
1.17b±0.08 |
1.30a±0.02 |
0.005 |
|
3rd Week |
1.09b±0.01 |
1.13b±0.02 |
1.21ab±0.09 |
1.32a±0.01 |
0.025 |
|
4th Week |
1.16c ±0.04 |
1.41ab±0.07 |
1.28bc±0.06 |
1.52a±0.01 |
0.005 |
|
5th Week |
1.48±0.07 |
1.47±0.04 |
1.69±0.14 |
1.77±0.02 |
0.061 |
|
6th Week |
1.77c±0.07 |
1.55b±0.03 |
1.89ab±0.06 |
1.96a±0.02 |
0.002 |
|
Final FCR |
1.33c±0.96 |
1.36c±1.31 |
1.45b±0.74 |
1.60a±1.47 |
0.023 |
One-way ANOVA with Duncan multiple range test (DMRT); abcSuperscripts indicate significant variation among the group. Significance level p<0.05