Table 1. Effects of various light emitting diodes on body weight, feed intake, and feed efficiency in broilers at 7, 21, and 49 days of age.
| Item | Age (day) | Light treatment |
|||||
|---|---|---|---|---|---|---|---|
| W | PB | BB | SB | GB | PG | ||
| Body weight(g) | 7 | 115.66±1.74 | 116.78±2.26 | 114.49±2.88 | 114.39±3.00 | 116.78±2.65 | 116.46±1.00 |
| 21 | 689.88±11.24 | 689.84±12.09 | 699.83±15.19 | 721.23±19.58 | 704.92±10.09 | 696.07±14.42 | |
| 42 | 1628.96±103.61b | 1703.81±113.78ab | 1697.51±105.02ab | 1690.70±146.63ab | 1746.71±105.54ab | 1819.80±177.90a | |
| Feed intake (g) | 7 | 118.61±3.26 | 118.50±4.26 | 118.97±6.63 | 116.15±3.91 | 118.84±4.85 | 117.63±5.56 |
| 21 | 1050.30±15.83 | 1050.67±14.74 | 1050.70±14.97 | 1092.04±48.13 | 1061.39±26.16 | 1049.40±16.12 | |
| 42 | 2970.08±157.79 | 3233.52±70.57 | 3122.42±177.13 | 3047.42±120.78 | 3031.89±108.86 | 3098.30±148.28 | |
| Feed efficiency | 7 | 1.03±0.0081 | 1.02±0.0048 | 1.04±0.0105 | 1.02±0.0048 | 1.02±0.0059 | 1.02±0.0017 |
| 21 | 1.52±0.0010 | 1.52±0.0101 | 1.51±0.0011 | 1.51±0.0023 | 1.51±0.0097 | 1.51±0.0036 | |
| 42 | 1.83±0.0038 | 1.78±0.0547 | 1.79±0.0135 | 1.80±0.0161 | 1.80±0.0145 | 1.82±0.0169 | |
a–b
Values with no common letters are significantly different (P<0.05).
Values are mean±SD (n=200/group). W, white light; PB, pure blue; BB, bright blue; SB, sky blue; GB, greenish blue; PG, pure green.