Table 3. Body weight, weight gain, feed intake, and feed conversion ratio of broiler chickens at different growth stages1
| Item | Experimental diets | SEM | P-value |
| CON | CP 1% reduced |
| OAA | HAA |
| Body weight (g) | | | | | |
| d 7 | 183 | 183 | 182 | 0.31 | 0.401 |
| d 21 | 1,037 | 1,041 | 1,005 | 14.1 | 0.196 |
| d 28 | 1,669 | 1,656 | 1,611 | 32.5 | 0.449 |
| Weight gain (g/bird) | | | | | |
| d 21 | 853 | 857 | 823 | 14.3 | 0.237 |
| d 28 | 624 | 615 | 598 | 17.9 | 0.597 |
| Overall | 1,478 | 1,472 | 1,421 | 29.3 | 0.365 |
| Feed intake (g/bird) | | | | | |
| d 21 | 1,098 | 1,116 | 1,117 | 17.0 | 0.695 |
| d 28 | 925 | 949 | 926 | 19.6 | 0.644 |
| Overall | 2,024 | 2,065 | 2,043 | 36.0 | 0.731 |
| Feed conversion ratio | | | | | |
| d 21 | 1.29b | 1.30b | 1.36a | 0.01 | 0.002 |
| d 28 | 1.49 | 1.54 | 1.55 | 0.02 | 0.092 |
| Overall | 1.37c | 1.40b | 1.44a | 0.01 | <0.0001 |
Data are means of six pens of 25 male Ross 308 chicks from 7 to 28 d post-hatch.
Means in a row with no common superscript letter differ significantly (P<0.05).