Table 3.
Effects of the application of colored photoperiodic light during incubation on time in hours to reach a specific percentage of hatch (set time to hatch time) in total hatched Ross 308 broilers.
| % of chicks hatch |
||||||||
|---|---|---|---|---|---|---|---|---|
| Wavelength | n1 | 5% | 10% | 25% | 50% | 75% | 90% | 95% |
| Dark | 7 | 483.2 | 486.4 | 491.0 | 495.6 | 500.0 | 504.2 | 506.8 |
| Blue | 8 | 480.8 | 484.3 | 489.6 | 494.8 | 499.8 | 504.4 | 507.0 |
| Red | 8 | 482.5 | 485.9 | 490.9 | 495.9 | 500.6 | 504.9 | 507.3 |
| White | 8 | 482.2 | 485.4 | 490.3 | 495.0 | 499.7 | 504.2 | 506.9 |
| SEM | 1.19 | 1.10 | 1.00 | 0.94 | 0.91 | 0.87 | 0.83 | |
| P-value | ||||||||
| Wavelength | 0.562 | 0.629 | 0.744 | 0.844 | 0.900 | 0.938 | 0.976 | |
| Block | 0.001 | 0.0004 | 0.0001 | <0.0001 | <0.0001 | <0.0001 | <0.0001 | |
1
Number of experimental units. Experimental unit = 1 incubator containing 238, 208, 212 and 200 eggs in trial 1, 2, 3 and 4, respectively.